Unconfirmed/Unpublished Planets Catalogue

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Unconfirmed/Unpublished Planets Catalogue

Post by Edasich on 3rd June 2008, 5:31 am

I export this "Giga-topic" from previous forum, in order to have references for all those inferred and never confirmed substellar/planetary object once claimed but never confirmed. Also I post all the "add-ons" notified by Extrasolar Vision I Forum's users. So it turns to be a mere "tome" Laughing



Introduction - Better known unconfirmed objects


- CSI+06-18266 1 (in NGC 6633): A2V star with a 2.9 Jupiter radii object. Probably stellar companion.
- EXP1 J1628-52c07s18161 (Norma field): 2-3 Mj transiting planet (period 2.8 days) to confirm since 2000! (check 2003 publication)
- GM Aurigae: 1.7 Mj, 2.5 AUs - no more articles related
- HD 208487 c &d: 0.46 Mj at 1.8 AUs and a "Hot Neptune" in tight orbit (<0.1 AUs)
- Aldebaran B: brown dwarf, low mass M dwarf or superplanet?
- Arcturus B: 11.7 Mj at 1.1 AUs
- Iota Horologii c: <2 Mj 2.1 AUs
- Pi Herculis: 27 Mj 3 AUs
- Lalande 21185 b & c: 1.6 Mj 2.2 AUs, 1.1 Mj 9.5 AUs
- Epsilon Indi Ab: 1.6 Mj 6.5 AUs
- Beta Hydri b & c: 0.23 Mj 0.158 AUs, 4 Mj 7.6 AUs
- Vega b & c: 3 Mj 30 AUs, 0.053 Mj 95 AUs
- Beta Pictoris b,c & d: 3.5 Mj 12 AUs, 0.6 Mj 25 AUs, 0.2 Mj 45 AUs
- Fomalhaut: <0.3 Mj 40 AUs
- Gamma2 Delphini: 0.7 Mj 1.39 AUs
- Gj 570 Ab: 1 Mj 1.06 AUs
- HD 34445: 0.58 Mj 0.51 AUs
- HD 3346 b&c: 10 Mj 0.3 AUs, 60 Mj 2.5 AUs.
- HD 68988 c: 15 Mj 6 AUs
- OGLE-TR-109 (Carina): 14 Mj 0.016 AUs
- KR Muscae: 20 Mj 6.5 AUs
- Phi2 Pavonis: 0.7 Mj 0.25 AUs
- HD 24040: 6.9 Mj 6.8 AUs
- 14 Herculis c: 2.1 Mj 6.9 AUs
- CM Draconis: which companions??
- 23 Librae c: 0.8 Mj 9.3 AUs
- Anon-1 (Lyra field): 0.3 Mj 0.028 AUs (Why discarded??)



Hungry4info wrote:http://www.extrasolar.net/forums/viewtopic.php?t=1619
Here's 3 more.
I've heard talk of a PSR 1620-26 c (a second planet). PSR 1257+12 D... though I'm not sure if that's disproven.


Take 2 - Brown dwarfs around Red Giants from '91?

I mean to report pages 519 and 520 from DUQUENNOY A. & MAYOR M. (1991) - Multiplicity among solar-type stars in the solar neighbourhood. II - Distribution of the orbital elements in an unbiased sample.
Here a 0.03/0.036 solar masses object is thought to be likely around the field M-giant 13 Bootis (or CF Bootis). It has a putative period is 494 days and a mild eccentricity as well (e=0.21).
The HZ for the giant is about 15.4 AUs, so its inferred moons might be hellish places. What about?
On the other hand the other field giant hosted small companions (0.08 < m< 0.11 Mso)but seem likely low-mass stellar.
If I read wrond, please correct. It seems interesting to me.


Take 3 - Brown dwarfs around far away bright giants?

Another interesting fact: according to Carney, Bruce W.; Latham, David W.; Stefanik, Robert P.; Laird, John B.; Morse, Jon A. (2003) - Spectroscopic Binaries, Velocity Jitter, and Rotation in Field Metal-poor Red Giant and Red Horizontal-Branch Stars, there are reported orbital solutions for various bright giant stars, revealing the presence of low mass stellar companions with masses ranging 0.2-0.7. The most interesting case is about two bright objects, namely the K0 giant HD 3008 (or CM Ceti) and the G0 giant BD+22° 2411.
The orbital solutions give orbital periods of 172,1 and 185,9 days respectively and masses of 0.034 and 0.017 solar masses for the companions (i.e 34 and 17 Jupiter masses).
It's specified there might be large error but it seems an interesting discovery.


Erratum= orbital solutions are not robust (pseudoperiodicities, not orbital periods). More likely the stellar-jitter rather substellar companions' presence.


Take 4 - Brown dwarf around sdB eclipsing binary HW Virginis

Another interesting B subdwarf, but quite neglected. According to Kilkenny, D., van Wyk, F., & Marang, F. (2003) - The sdB eclipsing system HW Vir: a substellar companion?, there may be a third long period (subtellar) companion orbiting around the B subdwarf HW Virginis.
The star is already an eclipsing binary with a low mass M dwarf (M3/M5V and 0.18 Solar masses) and the third object seems as massive as 0.028 Solar masses (i.e about 29 Jupiter masses).
Putative period is inferred 20.7 years.

Chaos Syndrome wrote:See this paper for more discussion of the orbital solution.

Take 5 - Brown dwarf in a multiple system - A Ksi Ursae Majoris B's analogue?

Another neglected brown dwarf object? I don't know if the article is still available but once I had it (I've to search it again and host it if needed). The paper Tokovinin, A. A. (1999) - New spectroscopic components in 8 multiple systems mentions the possible presence of a brown dwarf in very tight orbit (4.6 days) around the multiple system ADS 11163 ABC in Draco.


Take 6 - Planet around young M dwarf

Meyer, Michael R.; Beckwith, S. V. W.; Herbst, T. M.; Robberto, M. (1997) - The Transitional Pre--Main-Sequence Object DI Tauri: Evidence for a Substellar Companion and Rapid Disk Evolution.
A possible brown dwarf (<70 Jupiter masses?) at 20 AUs from the young M dwarf DI Tauri.


Take 7 - Brown dwarf and Microlensing Events in M31?

This one will make your veins chill...
Two neglected Microlensing Events from M31? Both objects in low-mass brown dwarf regime (0.02-0.08 Mso)!!

Riffeser, Arno; Fliri, Jürgen; Bender, Ralf; Seitz, Stella; Gössl, Claus A. (2003) - The Wendelstein Calar Alto Pixellensing Project (WeCAPP): First MACHO Candidates.
The objects WeCAPP GL1 and GL2 host two substellar objects between 20 and 80 Jupiter masses. Low mass stellar companions are unlikely. Unfortunately no info about host stars neither average separation.


Take 8 - Still B subdwarfs and substellar companions

Still sdB stars...
Edelmann, H., Altmann, M., & Heber, U. (2006) - Discovery of Four Radial Velocity Variable Sdb Stars with Eccentric Orbits.
Brown dwarf companions for CPD-64° 481 and BPS CS 22169-0001, B subdwarfs (0.03 and 0.05 Solar masses with periods of 0.27 and 0.178 days. Mildly eccentric orbits are likely as well (e=0.02-0.06).


Take 9 - Neglected objects?

Still neglected brown dwarfs from 2000?
A low-mass stellar and substellar companion search program has been completed using the Near-Infrared Camera and Multi-Object Spectrometer (NICMOS) Camera 2 coronagraph aboard the Hubble Space Telescope (HST). Coronagraphic observations of seven targets were obtained with the F165M, F171M, F180M, and F207M filters. Of the seven IR-excess stars observed, two ( HD155826 and HD68456 ) were found to have potential companions within 4" from the parent star. We report photometric measurements of the suspected companions and compare their photometry to Gliese 229B. Support for this work was provided by NASA through grant number G0-07385.03-96A from the Space Telescope Science Institute (STScI).
No paper. Only citation here


Take 10 - Putative Brown dwarf around Alpha Circini, rapidly rotating A star

Brown dwarfs around A stars. You thought only 59 Draconis hosted a BD? Maybe not.
Checking pages 537 and 538 from Kurtz, D. W., Martinez, P., & Ashley, R. P. (1993) - Radial Pulsation and the Rotation Period of the Rapidly Oscillating Ap-Star Alpha-Circini (HR5463, HD128898), there may be the possibility of a 66 Jupiter masses (0.066 Solar masses) with a period of 524.2 days.


Take 11 - Never confirmed planet around MACHO.120.22303.5389

Marasama wrote:Radial Velocity Follow-up of Planetary Transit Candidate MACHO.120.22303.5389
http://xxx.lanl.gov/abs/astro-ph/0612214
radius >= 1.8Rj
mass ~4Mj
Orbits a K dwarf
The system either consist:
K dwarf + planet + star OR EB binary + 3rd star


Take 12 - Disproven candidates around Epsilon Indi A

Marasama wrote:Epsilon Indi system
- RV measurements gives an RV shift of +0.012±0.002ms^1, indicates a possible distant stellar companion or a Porb>20yrs planetary compaion. This is after Epsilong Indi Ba/Bb was discovered.
(man, if I only know what the shift meant...)
Also, what probably would have been Eplsilon Indi C is disproven.
Object is at 7.3±0.1" and position angle 302.9±0.8° was detected. Spectra = L5-L9.5, possibly a brown dwarf or low-mass star. M.Endl using HST/NICMOS found it to be a background object (no distance given).
Paper = A direct and differential imaging search for sub-stellar companions to epsilon Indi A.


I answered:

Edasich wrote:I noticed that paper, but since the companion is ruled out at once in the work, it's not useful to post it.
Anyway the 2002 paper about an inferred 4 Jupiter masses planet at 7.6 AUs around Beta Hydri and a 1.6 Jupiter masses one around Epsilon Indi A at 6.5 AUs remain unconfirmed or unpublished or unconstrained objects and may be posted here.
I have the paper and I need to post it somewhere as I can. Wink


Take 13 - Additional planets in Exoplanet hosts

Chaos Syndrome wrote:Quite a few systems have such RV trends, which may indicate companions (either stellar or substellar) on long-period orbits. The nature of such companions can only be constrained when enough of the orbit has been sampled.
Probing long-period companions to planetary hosts. VLT and CFHT near infrared coronographic imaging surveys lists HD 28185, HD 154857 and HD 187123 as having such trends in addition to the known planets.
The red dwarf Gliese 849, already known to host one jovian-class planet also exhibits a linear trend, see A Long-Period Jupiter-Mass Planet Orbiting the Nearby M Dwarf GJ849
Etc.


To be continued next thread (too massive message!)


Last edited by Edasich on 19th November 2008, 11:45 am; edited 2 times in total
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Edasich on 3rd June 2008, 5:31 am

Take 14 - Unconfirmed Hot Neptunes and misc


I forgot to add these ones, even if I posted in HD 177830 c confirmed? thread. Plus, I add inferred additional planets and unconfirmed ones from mentioned papers.
From Goździewski, K. & Migaszewski, C. (2006):
- HD 188015 c: M=0.07 Jupiter masses P=8.386 days a=0.08 AUs e=0.23
- HD 114729 c: M=0.065 Jupiter masses P=13.84 days a=0.11 AUs e=0.25
- HD 147513 c: M=0.115 Jupiter masses P=7.89 days a=0.08 AUs e=0.3
- HD 208487 d: M=0.12 Jupiter masses P=14.5 days a=0.11 AUs e=0.43
Plus, gotta add this paper as well: Four new exoplanets and hints of additional substellar companions to exoplanet host stars:
-HD 164922 c: M=0.06 Jupiter masses P=75.8 days a=0.35 AUs
-70 Virginis c?: M<0.1 Juputer masses? P=9.58 days a=0.088 AUs?
-HD 24040: M=10.4 Jupiter masses P=20000 days a=15.3 AUs
-HD 187123 c: M=3.96 Jupiter masses P=9188 days a=8.17 AUs e=0.35
-HD 68988 c: M=15.8 Jupiter masses P=12800 days a=11.4 AUs e=0.35
-HD 11964 d: M=0.21 Jupiter masses P=360 days a=1.13 AUs e=0.63
-HD 155358 d: M<0.1 Jupiter masses? P<10 days a<0.1 AUs?


Take 15 - Nearby Exoplanets from 2001?


I have to host the paper at a Web-File-Hosting sie because the paper link is no more available (only abstract preview without full text view):
The planet search program at the ESO Coud´e Echelle
spectrometer - III. The complete Long Camera survey results
This paper is from 2002 and talks about well-known unconfirmed or disproven systems available in Extrasolar Visions (i.e Phi2 Pavonis b and HR 5568 Ab). It talks about limits in detection of planetary companions around some notable nearby stars, but...it talks about DETECTED PLANETARY COMPANIONS IN THIS SURVEY, but not published:
Samples:
- Iota Horologii may likely host an additional jovian in 2:1 resonance with "b" and period=620 days.
- HR 5568 A has been poorly observed but the possible 1-Mj planet at 0.7 AUs is likely. It's detected a HOT NEPTUNE too!! A 0.079 Mj object at 0.036 AUs (P=3 days).
- Beta Hydri could host a 4 Mj planet at 7.6 AUs.
- Epsilon Indi A could host a 1.6 Mj planet at 6.5 AUs.
- The M dwarf GJ 433 could host a 9.8 Mj planet at 0.5 AUs.
- Probable planet around HR 7703 within 1.75 AUs.
That is very very interesting for me.

Bynaus wrote:I found the paper at arxiv.org and on the harward abstract server.
http://adsabs.harvard.edu/abs/2002A%26A...392..671E
http://arxiv.org/abs/astro-ph/0207512
Have fun! Smile


Take 16 - Disproven objects around young stars from NACO survey

Marasama wrote:2 unconfirmed, but unlikely candidates.
V 343 Nor
- V 343 Nor b, 25-30AU away, ~17mag in H band
- unlikely due to probably being a background star.
SAO 252852
- SAO 252852 b, 5Mj, ~16mag in K band
- unlikely due to probably being a background star.
A search for hot massive extrasolar planets around nearby young stars with the adaptive optics system NACO

Marasama wrote: - SAO 252852 b, 5Mj, ~16mag in K band
i.e Alpha Circini Bb.
Yeah, it seems unlikely. Thanks for the notice, anyway Wink


Take 17 - Neglected brown dwarf host

Another neglected brown dwarf candidate from 2001:
HD 127506 B (22 pc in Bootes) HZ=0.37 AUs
M=36 Mj P=2599 days e=0.72
Putative average separation=3.7 AUs
Accounting a high eccentricity (e=0.72), such object swings between 1.04 and 6.36 AUs.


Take 18 - Planets around the white dwarf RY Leonis Minoris?

Another planet orbiting a white dwarf? (I mean together the putative GD 66 b)
Paper
Measuring the evolution of the most stable optical clock G 117-B15A
The star is also known as RY Leonis Minoris
A M-dwarf stellar companion in wide orbit was claimed but subsequent measuring seems rule out this companion due to different parallax distances for both. Nevertheless a Jovian-mass planet in wide orbit may be responsible of the observed variations.
M= 1 Mj
P=223 years
a=31 AUs
There may be additional planets between 0.27-1.6 Jupiter masses with orbital periods between 6 months (180 days) and 7 years.


Take 19 - Protoplanets in HD 141569 A

Chaos Syndrome wrote:You might want to add the pre-main sequence star HD 141569: some planets inferred from disc structure.
Either a ~0.3 Mj planet at 250 AU with e=0.05,
or a ~3 Mj planet at 235 AU with e=0.2.
In addition there is tentative evidence that there might be a Saturn-mass planet at 150 AU, however the disc structure is poorly constrained in the relevant region.
Wyatt 2005: Spiral structure when setting up pericentre glow: possible giant planets at hundreds of AU in the HD 141569 disk
See also this paper about how to get planets out to such large distances.


Take 20 - Brown dwarf in Gliese 22 multiple system


A fresh unconfirmed superjovian planet or brown dwarf:
Gliese 22 b
Mass= 16 Mj
Semi major axis= ? AUs (4 AUs?)
Orbital period ~ 5500 days
This sound quite interesting. It may be a circumbinary planet or low mass brown dwarf.


Take 21 - 36 Ursae Majoris b?

36 Ursae Majoris: a never confirmed companion.
M=60 Mj
P=18 yrs
e=0.81
a=6.8 AUs


Take 22 - Altair B?

Okay, this is chilling.
A substellar companion around Altair?
According this paper from 1978, there is a 50 Jupiter masses object with orbital period of 12.5 years with e=0.39.
Spurious? Likely, but intriguing.


Take 23 - Massive planets around young M dwarfs

Chaos Syndrome wrote:You might want to add the following objects that may have planetary masses ("sub brown dwarfs"?). They have been detected by imaging.
From this paper:
CHXR 73 B - 0.012 solar masses (=12.6 Jupiter masses), 210 AU separation
DH Tau B - 0.011 solar masses (=11.5 Jupiter masses), 330 AU separation (note that the discovery paper pegs the mass at 50-60 Jupiter masses)
Mass estimates depend on evolutionary models and so are only as good as the models used, and of course the question of whether such objects are truly planets in the normal sense of the word is still open even if the masses are below 13 Jupiters.


Take 24 - Eerie object around a millisecond pulsar


This sounds interesting: a degenerated companion around a millisecond pulsar from 2001.
Orbital variability of the PSR J2051-0827 Binary System
The pulsar LY Aquarii has a companion with maximum mass around 55 Jupiter masses (average mass, around 27 Jupiter masses) in 2.4 hours orbit (with pulsar's mass=1.4 times Solar, the separation should be 0.0047 AUs). The object radius is extimated being 0.03 Solar radii (3.3 Earth radii object??? A neptune sized brown dwarf???)

Chaos Syndrome wrote:That combination of mass and radius sounds like it is a very undermassive white dwarf.


Take 25 - Sigma Orionis keeps surprising


Ok, this is strange. A brown dwarf in tight orbit around Sigma Orionis E??
Radial velocities of Sigma ORI E
A 0.04 Solar masses object (i.e 40 Jupiter masses) in 1.19 days orbit could explain the radial velocity variation. Assuming the paper is quite old and such early spectral type stars use to be intrinsically variable too, this could sound a bit naive. By the way it was worth to notify it.
If you wanna have fun to calculate average separation, Sigma Orionis E has 6 times the mass of the Sun, thus the actual orbital placement would lay within 0.04 AUs.


Take 26 - Asteroid belt around a pulsar

Chaos Syndrome wrote:Rocking the Lighthouse: Circumpulsar Asteroids and Radio Intermittency - the odd behaviour of PSR B1931+24 might be because of asteroids falling into the pulsar's light cylinder, perhaps caused by interactions with a larger asteroid on a ~40 day orbit.


Take 27 - Brown dwarfs around yellow subdwarfs?


This paper is quite interesting and not so old.
A Survey of Proper-Motion Stars. XVI. Orbital Solutions for 171 Single-lined Spectroscopic Binaries
It seems there's a horde of possible brown dwarf companions around yellow subdwarf candidates too. I'm aware the companions could turn out to be low mass stellar (as for HD 169822, which is listed to host a 0.023 Mso object *it is rather a M3 dwarf*) but I think it is an interesting paper to notify by the way.
However here I report what I've extracted from paper XII, including mass and distance from Sun. Average separations have been calculated by me, hoping they're correct:

- G 9-42 (HD 77065) (sdG5)= 0.77 Mso+0.038 Mso (i.e 38 Mj) P=120.44 d e=0.8 a=0.43 AUs D=31.95 pc
- G 62-30 (HIP 65040) (sdG0)= 0.77 Mso+0.038 Mso (i.e 38 Mj) P=305.11 d e=0.59 a=0.8 AUs D=64.8 pc
- G 165-22 (HD 118742)* (G5V)= 0.9 Mso+0.038 Mso (i.e 38 Mj) P=11.58 d e=0.084 a=0.098 AUs D=47.68 pc
*This requires a note: the system is quintuple.
Aa-Ab P=11.58 d MAa=0.9 Mso MAb=0.07 Mso
AaAb-B P=869.96 yrs MB=0.57 Mso
AB-CD P=86,080 yrs
C-D P=11,010 yrs MC=0.76 Mso MD=0.3 Mso*
- G 65-52 (?)= 0.62 Mso+0.036 Mso (i.e 36 Mj) P=150.81 d e=0.257 a=0.5 AUs D=151 pc
- G 178-27 (sdF5)= 0.68 Mso+0.051 Mso (i.e 51 Mj) P=81.18 d e=0.43 a=0.33 AUs D=151 pc
- G 15-6 (HIP 73800) (G4?V)= 0.67 Mso+0.064 Mso (i.e 64 Mj) P=265.59 d e=0.45 a=0.738 AUs D=63 pc
- G 66-65 (HD 134113) (sdF9V-VI?)= 0.7 Mso+0.043 Mso (i.e 43 Mj) P=201.715 d e=0.9 a=0.627 AUs D=64.93 pc
- G 18-35 (HD 210631) (sdG0?)= 0.75 Mso+0.072 Mso (i.e 72 Mj) P=3822 d e=0.37 a=4.38 AUs D=72.56 pc
- G 190-10 (Ross 783) (sdG1?)= 0.6 Mso+0.044 Mso (i.e 44 Mj) P=120.44 d e=0.8 a=0.432 AUs D=91 pc

If it were real, this could be like an ice cream kiosk in the...brown dwarf desert. Hoping it's not a mirage *lol*


Take 28 - Extrasolar Transiting Planet Search with Subaru Suprime-Cam


Marasama wrote:Extrasolar Transiting Planet Search with Subaru Suprime-Cam
Results:
Object-1 (G0-K5 or M0-5 dwarf)
- not a giant star, if giant, it exceeds the galactic distance
- 0.3-1.2kpc
b = (exoplanet candidate) uncertain
-- if dM2, then = 0.6-1.3Rj, Porb=2.1-6.9d, a=0.02-0.03AU, LOS i=86-89°
has picture on page 7
Object-2 (K5-M0 dwarf)
- not a giant star (late-K giant), if giant, it exceeds the galactic distance
- 1.3-2.3kpc
b = (exoplanet candidate) uncertain
-- 1.3-1.6Rj, Porb=1.5-2.5d, a=0.02-0.03AU, LOS i=84-86°
has picture on page 7
Object-3 (double star)
A = Ojbect-3-A (K0-M2)
-- 1.3-2.3kpc
b = (exoplanet candidate) uncertain
-- 0.9-1.5Rj, Porb=1.7-5.6d, a=0.03-0.05AU, LOS i=83-88°
B = Object-3-B, ρ~0.6"
has picture on page 7
Object-4 (binary)
- 2.3-4.0kpc
A = (K5-M0 probably a dwarf)
B = (late-M dwarf), a=0.02AU, e=(circular calculated), 2.5-3.0Rj, LOS i=840°
Object-5 (EB)
- very faint in B-band
A =
B = Porb=0.942d
Link 1
Link 2
FYI: Object-NN catalog is listed as [UYS2006] Object-NN in SIMBAD
Legend:
ρ = (rho), seperation from primary in arcminutes (') or arcsecond (")
a = semi-major axis
EB = Eclipsing Binary
d = day(s)
i = inclination
kpc = kiloparsec
LOS = line-of-sight
Porb = Orbital Period
Rj = Radius in Jupiter

That's all. Any further claim of uncofirmed or unpublished planetary/substellar objects needs other threads in this topic lol!
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Lazarus on 3rd July 2008, 8:21 am

In reference to CM Draconis, the most recent planet paper is this one, which suggests an object in an 18.5-year orbit.

Note that the brown dwarf candidate listed on Extrasolar Visions is regarded as disproven (see the April 1998 entry in the News section of the TEP homepage). The 750-day planet was not detected in the study I linked in the top of the post and probably does not exist.

...also this thread does not seem to fit well with the description of the "Extrasolar Planetology" forum... perhaps it would be better located in News & Discoveries (perhaps as a sticky thread there?)
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Sirius_Alpha on 3rd July 2008, 11:28 am

Lazarus wrote:...also this thread does not seem to fit well with the description of the "Extrasolar Planetology" forum... perhaps it would be better located in News & Discoveries (perhaps as a sticky thread there?)

You've a good point. The unconfirmed/unpublished planets catalogue is something that gets used a lot, and has a lot of practical uses anyway. I mean seriously, planets get unconfirmed and unpublished often. So it makes sense to have a specific thread for it.

So sure, I'll make it a sticky in the aforementioned forum.

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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Edasich on 3rd July 2008, 11:43 am

Ok. It's okay for me Wink
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Edasich on 9th July 2008, 9:55 am

Epsilon Eridani c re-examined.

Recent paper talks about again.

http://fr.arxiv.org/abs/0807.0301


Planet would always have 1/10th of Jupiter mass (0.1 Mj), putative average separation 40 AUs and eccentricity=0.3.
Period=102,270 days (i.e 280 years).
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Sirius_Alpha on 9th July 2008, 1:57 pm

I think Epsilon Eridani c is going to stay unconfirmed for a very long time... same with q1 Eri c, as well.

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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Sirius_Alpha on 9th July 2008, 6:42 pm

Okay, I went through Edasich's unconfirmed planet candidates and found some references for them.

CSI+06-18266 1 bThe UNSW Extrasolar Planet Search: Methods and First Results from a Field Centred on NGC 6633
EXP1 J1628-52c07s18161 bPossible Transiting Planet Candidates from the EXPLORE Project
GM Aurigae bConstraints on a planetary origin for the gap in GM Aurigae's protoplanetary disc
HD 208487 cA Bayesian Kepler Periodogram detects a second planet in HD 208487
HD 208487 dAbout putative Neptune-like extrasolar planetary candidates
Aldebaran bLong-period radial velocity variations in three K giants
Arcturus bLong-period radial velocity variations in three K giants
Iota Horologii cESO Press Release
Pi Herculis bUnable to find reference
Lalande 21185 b,c Lalande 21185
Epsilon Indi AbNASA Hubble Space Telescope Daily Report #3904
Vega bResonant Trapping of Planetesimals by Planet Migration: Debris Disk Clumps and Vega's Similarity to the Solar System
Beta Pictoris b, c, dPlanets of Beta Pictoris Revisited
Fomalhaut bPress Release
Gamma2 Delphini bA Program for the Analysis of Long-Period Binaries: The Case of γ Delphini (.pdf)
Gliese 570 bRetracted
HD 34445 bUnable to find reference (still...)
HD 3346 b, c?HD 3346
HD 68988 cFour New Exoplanets and Hints of Additional Substellar Companions to Exoplanet Host Stars
OGLE-TR-109 bMillimagnitude Optical Photometry for the Transiting Planetary Candidate OGLE-TR-109
KR MUscae bResolving the disk rotation of HD 97048 and HD 100546 in the [O I] 6300 Å line: evidence for a giant planet orbiting HD 100546
Phi2 PavonisUnable to find reference... considered unpublished by the original Extrasolar Visions website
HD 24040 bFour New Exoplanets and Hints of Additional Substellar Companions to Exoplanet Host Stars
14 Herculis cLong-Period Objects in the Extrasolar Planetary Systems 47 Ursae Majoris and 14 Herculis
CM Draconis bA search for Jovian-mass planets around CM Draconis using eclipse minima timing
23 Librae cUnable to find reference
Anon-1 bPlanets of young stars: the TLS radial velocity survey

Why is HD 208487 c still considered "unconfirmed"? It looks pretty conclusive to me...
The authors of the paper wrote: The results of our Bayesian model selection analysis indicate that a two planet model is greater than 100 times more probable than a one planet model with the previously estimated jitter.

The paper that discusses a Neptune-mass planet around HD 208487 also describes possible Neptune-mass planets around HD 188015, HD 114729, HD 147513, and HD 190360... which is Gliese 777 A, and has already been confirmed.

For Beta Hydri, the only thing relevant I found was a vague reference from Wikipedia... which in my opinion doesn't count. As far as a paper goes, I was unable to find anything.

The link for HD 3346 is pretty lame... I'm sure there's a better one out there somewhere.

Four New Exoplanets and Hints of Additional Substellar Companions to Exoplanet Host Stars, which reported about HD 24040 b, also reported on HD 154345 b.


Last edited by Sirius_Alpha on 13th July 2008, 8:08 pm; edited 1 time in total (Reason for editing : Severe spelling issues.)

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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Lazarus on 9th July 2008, 7:46 pm

Sirius_Alpha wrote:The link for HD 3346 is pretty lame... I'm sure there's a better one out there somewhere.
In the reference you gave it mentions this paper, which gives a spectroscopic orbit for the outer companion:

Period576.2 ± 3.5 days
Eccentricity0.30 ± 0.06
Time of periastronMJD 43787 ± 22
Argument of periastron279 ± 15 degrees
Velocity amplitude0.69 ± 0.08 km s-1
Mass function(17 ± 5) × 10-6 solar masses
The mass function f(m) = [M2 sin(i)]3 / [M1 + M2]2

Then again...

As the periodogram for HR 152 shows, there are marginally significant peaks of order two weeks, 200 days, and >2500 days, but none corresponding to the ~600-dy period detected by the other groups. From the sparse sampling of these data, and perhaps from the use of an oversimplified parent function, we are unable to add any definitive statements about periodicity in the radial velocities of this star.
Very weak "not there" on the ~600 day companion...
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Sirius_Alpha on 9th July 2008, 8:01 pm

Edasich, don't forget the SWEEPS planets under "unconfirmed".

And Thank-you, Lazarus for the link.

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Re: Unconfirmed/Unpublished Planets Catalogue

Post by marasama on 13th August 2008, 5:38 pm

The Nebula around EGB 6/PG 0950+139: Evidence for Ablation of a Jovian Planet?
http://adsabs.harvard.edu/abs/1989ApJ...347..910D

Planetary Nebula = EGB 6
- central star is "PG 0950+139"
- the planetary nebula is abnormally large and has a plasma torus.
- inner edge of the plasma toroid is ~0.5AU
Possibly explaination is a Jovian-type highly ionised planet companion.
- location: If at ~2-3AU, then the planet's radius is ~0.6Rs (super ablation)
- mass of planet is roughly Saturn mass. Atmosphere will be super ionized.

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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Edasich on 14th August 2008, 6:52 am

marasama wrote:The Nebula around EGB 6/PG 0950+139: Evidence for Ablation of a Jovian Planet?
http://adsabs.harvard.edu/abs/1989ApJ...347..910D

Planetary Nebula = EGB 6
- central star is "PG 0950+139"
- the planetary nebula is abnormally large and has a plasma torus.
- inner edge of the plasma toroid is ~0.5AU
Possibly explaination is a Jovian-type highly ionised planet companion.
- location: If at ~2-3AU, then the planet's radius is ~0.6Rs (super ablation)
- mass of planet is roughly Saturn mass. Atmosphere will be super ionized.

This is something REALLY interesting! alien
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by marasama on 21st August 2008, 5:07 pm

Activity and Kinematics of Ultracool Dwarfs Including An Amazing Flare Observation
This paper states that two ultracool dwarfs could have VLM companions, though none detected. Stated on page 11. No thorough or detailed data. Just mentions it.

Exhibit variability in Hα emission that could be interpreted by a VLM companion.
PC 0025+0447 / PC 0025 (dM9.5)
2MASS J10224821+5825453 / 2M1022+58 (variable dL1)

* Red text is a short-hand version of the name. Short-hand versions of the name is not searchable in SIMBAD.
* The "d" stands for dwarf.

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Re: Unconfirmed/Unpublished Planets Catalogue

Post by tesh90 on 22nd August 2008, 7:53 am

Cannot wait for the official results to come out!!!


http://scienceblogs.com/catdynamics/2008/08/rocky_mountain_high.php#more

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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Sirius_Alpha on 22nd August 2008, 9:11 am

tesh90 wrote:Cannot wait for the official results to come out!!!
http://scienceblogs.com/catdynamics/2008/08/rocky_mountain_high.php#more

Yeah, there's been rumors of something interesting in the CoRoT pipeline for a long time now... It looks like waiting is something we'll continue to do plenty of. If they are talking about the 1.7 Earth-radius object, that's going to be a hard one to confirm, so expect the most interesting results to take a while.

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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Lazarus on 28th August 2008, 11:10 am

CARMA Millimeter-Wave Aperture Synthesis Imaging of the HD 32297 Debris Disk
There is a possibility that asymmetries seen in the debris disc of the A-type star HD 32297 are caused by resonances with an orbiting planet.

...and since I mentioned it elsewhere...

How Observations of Circumstellar Disk Asymmetries Can Reveal Hidden Planets: Pericenter Glow and its Application to the HR 4796 Disk
Structures in the circumstellar disc around HR 4796A might be caused by an unseen planet, but the companion star HR 4796B might be responsible instead.
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Sirius_Alpha on 3rd September 2008, 6:46 pm

First Results From The SDSS-III Multi-object APO Radial-velocity Exoplanet Large-area Survey (MARVELS)
Link


Abstract wrote:We present the first light results from the Multi-object APO Radial-Velocity Exoplanet Large-area Survey (MARVELS). MARVELS is part of the on-going Sloan Digital Sky Survey (SDSS) III survey which started in July 2008 and will end in July 2014. The data are taken with a multi-object fixed delay interferometer coupled to a R=11,000 spectrograph capable of acquiring precision radial velocities (3-20 m/s depending on V magnitudes) for ~60 objects simultaneously in the 3 degree field of view of the SDSS telescope. MARVELS is to monitor a total of 11,000 V=8-12 relatively bright survey stars over ~800 square degrees over the 6 years. The survey stars include about 90% F8 and later type main sequence stars and subgiants, and 10% G and K giants with V=7.6-12. MARVELS will produce the largest statistically well defined sample of giant planets drawn from a large of host stars with a diverse set of masses, compositions, and ages which will be used to study exoplanet diversity and planet formation, migration & dynamical evolution. It will also possibly discover rare planet systems and identify signposts for lower-mass or more distant planets. The first two year survey data will be released to the public in 2011. A new planet in a spectroscopic binary system discovered in the MARVELS pilot program will also be reported..

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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Lazarus on 4th September 2008, 7:33 am

Photometric Follow-up of 6 OGLE Transiting Planets Candidates
Period variations in OGLE-TR-111 may indicate a second planet in the system. Plus another unconfirmed planet-host, OGLE-TR-142.
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Edasich on 4th September 2008, 7:47 am

Abstractsonline uses to give only vague references.
Never a solid full text article
Often such news are quickly forgotten
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Lazarus on 5th September 2008, 10:12 am

Judging by a few papers that appeared on the arXiv in the last couple of weeks, there's an upcoming microlensing planet detection, see e.g. Microlensing Zone of Planets Detectable through the Channel of High-Magnification Events

MOA-2007-BLG-400Lb. See this thread.


Last edited by Lazarus on 19th September 2008, 7:39 am; edited 1 time in total (Reason for editing : planet is no longer unpublished)
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Sirius_Alpha on 9th September 2008, 7:31 pm

Three possible new planets from dust disk morphology.

http://www.space.com/scienceastronomy/080909-st-planet-gaps.html

Perhaps a jovian planet at 3.5 AU around SR 21,
Perhaps a jovian planet 10-20 AU around HD 135344 B.
Perhaps one or two jovian planets around TW Hydrae.

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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Lazarus on 10th September 2008, 5:43 am

Sirius_Alpha wrote:Three possible new planets from dust disk morphology.

http://www.space.com/scienceastronomy/080909-st-planet-gaps.html

Perhaps a jovian planet at 3.5 AU around SR 21,
Perhaps a jovian planet 10-20 AU around HD 135344 B.
Perhaps one or two jovian planets around TW Hydrae.
The paper is available on arXiv here (it dates back to May). Interestingly they found that the inner disc of TW Hya is orientated at roughly 4 degrees to the line of sight. If the inner disc represents the inclination of the planets, it would make the RV companion (if it exists) about 16 Jupiter masses (brown dwarf range).
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Edasich on 10th September 2008, 7:38 am

Three possible new planets from dust disk morphology.

If really existing, they could make my day cheers
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Sirius_Alpha on 12th September 2008, 11:25 pm

According to SIMBAD, TYC 7190-2111-1 (TWA 7) may have a planet.

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Re: Unconfirmed/Unpublished Planets Catalogue

Post by marasama on 18th September 2008, 11:01 am

WD 1847-223J (white dwarf)
Man, I cannot find this puppy in SIMBAD.
Detected faint objects around it in 2004.
Objects are still present in 2006, but the positions did not move.
Then the objects are background stars/objects.

Search for Giant Planets around White Dwarfs with HST, Spitzer, and VLT
Same paper, different links.
Abstract
Harvard paper

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Re: Unconfirmed/Unpublished Planets Catalogue

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