Unconfirmed/Unpublished Planets Catalogue

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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Lazarus on 9th February 2011, 2:01 pm

The Extrasolar Planets Encyclopaedia has added several circumbinary planets to the unconfirmed list:

DQ Herculis (ab) c (20 Jupiter masses)
HU Aquarii (ab) c (5 Jupiter masses)
UZ Fornacis (ab) c (14 Jupiter masses)
Z Chamaeleontis (ab) c (20 Jupiter masses)
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Edasich on 9th February 2011, 2:16 pm

Lazarus wrote:The Extrasolar Planets Encyclopaedia has added several circumbinary planets to the unconfirmed list:

DQ Herculis (ab) c (20 Jupiter masses)
HU Aquarii (ab) c (5 Jupiter masses)
UZ Fornacis (ab) c (14 Jupiter masses)
Z Chamaeleontis (ab) c (20 Jupiter masses)

Guess who's suggested?? Rolling Eyes Wink
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Sirius_Alpha on 18th February 2011, 2:22 pm

T Cha b.
"Co-motion with the parent star not checked yet and no precise mass value given (Huelamo et al. 2011)."

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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Lazarus on 24th February 2011, 3:50 pm

The ESO website has a press release about the T Chamaeleontis detections, links to the discovery papers are available there as well.
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Sirius_Alpha on 6th March 2011, 9:19 pm

http://arxiv.org/abs/1103.0911
5σ detection of transit-like events at the bright (V = 7.2) star HD 213597 with STEREO. RV followup required.

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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Daniel on 11th March 2011, 10:37 pm

I never hear again about the Planet around LHS 288 a M dwarf star at 15.6 light years than was detect by astrometry, but not confirm yet...

http://en.wikipedia.org/wiki/LHS_288

http://www.astro.virginia.edu/~jlb2j/Dissertation/SStarsFinal.pdf
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Edasich on 12th March 2011, 5:20 am

Thank you to remember us this one Wink
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Lazarus on 6th April 2011, 6:50 pm

Constraining the structure of the planet-forming region in the disk of the Herbig Be star HD 100546

Disc morphology can be explained by a 1-8 Jupiter masses planet at ~8 AU from HD 100546.
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Lazarus on 7th April 2011, 3:57 am

From Astronomy and Astrophysics "Forthcoming" list...

A likely exoplanet orbiting the oscillating K-giant alpha Arietis
B.-C. Lee, D. E. Mkrtichian, I. Han, K.-M. Kim, M.-G. Park
Received: 10 December 2010 / Accepted: 10 March 2011
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Lazarus on 11th April 2011, 2:58 am

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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Edasich on 12th April 2011, 6:10 am


Once again astrometry finds something that actually does not exist. However there are still some possibilities...
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Lazarus on 12th April 2011, 4:56 pm

Sirius is a difficult target, not really ideal for precision astrometry as it is too bright.

Amusing contrast with the various planets detected by the space-based transit surveys, which are hard to follow up because the stars are so dim.
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Sirius_Alpha on 10th May 2011, 10:13 am

The EPE has added an unconfirmed microlensing planet, OGLE-2008-BLG-513/MOA-2008-BLG-401, from this paper.

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Re: Unconfirmed/Unpublished Planets Catalogue

Post by tommi59 on 10th May 2011, 11:45 am

Discovered by microlensing planet is unconfirmed??strange?
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Lazarus on 10th May 2011, 3:24 pm

Probably because no paper is available yet.

(Although EPE is not consistent in this... how are those 32 HARPS planets announced back in October 2009 coming along?)
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Lazarus on 11th July 2011, 2:15 pm

Something to bear in mind when considering the case of the claimed companion of Epsilon Ursae Majoris (Alioth):

Modelling the light variability of the Ap star ɛ Ursae Majoris

The star has light variability arising from varying concentrations of various chemical elements across its surface and it has a rotation period of 5.1 days, the same as the claimed orbital period of the substellar companion. I therefore have to wonder whether the radial velocity variations might be arising due to processes intrinsic to the star, something which was only briefly addressed in Sokolov's paper.
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Edasich on 12th July 2011, 4:32 am

Noticed that. But curiously the paper does not mention Sokolov's paper, neither rejects the proposed substellar companion...

And neither a further research paper has been so far provided
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Edasich on 9th August 2011, 8:57 am

Here some cases of substellar objects with mass around or below the 25 Jupiter masses thresold established for the Extrasolar Planet Encyclopaedia. I hope these ones may be listed in the planet counter of EPE soon:

1) 17-20 Jupiter masses companion 1,400 AUs away from WL 13 (or VSSG 25), binary system with two M4 dwarfs. To be eventually labelled as WL 13 (AB)b or VSSG 25 (AB)b.

http://arxiv.org/abs/1106.0574


2) GSC 08047-00232 B, confirmed as 20 Mj object in Chauvin et al. (2010)

http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2010A%26A...509A..52C&db_key=AST&nosetcookie=1

3) WISEPC J045853.90+643451.9 AB, a T8.5+T9 system. Total mass 25 Jupiter masses and secondary equivalent to 10 Mj.

http://adsabs.harvard.edu/abs/2011AJ....142...57G

http://arxiv.org/abs/1106.3142

4) 2MASS J0041353-562112 - 30 Mj brown dwarf with low-mass companion (15 Jupiter masses) in Phoenix field.

http://www.aanda.org/index.php?option=com_article&access=doi&doi=10.1051/0004-6361/201014206&Itemid=129

5) LOri 167 - low mass binary with 17 and 5 Jupiter masses components in Orion

http://www.aanda.org/index.php?option=com_article&access=standard&Itemid=129&url=/articles/aa/pdf/2007/22/aa7258-07.pdf

6) HD 203030 B - optically imaged, mass 23 Jupiter masses

http://cdsbib.u-strasbg.fr/cgi-bin/cdsbib?2006ApJ...651.1166M

7) G 196-3 B - Latest mass estimate for G 196-3 provides range between 12 and 25 Jupiter masses (Zapatero-Osorio et al. 2010)

http://cdsbib.u-strasbg.fr/cgi-bin/cdsbib?2010ApJ...715.1408Z

Cool SDSS J224953.47+004404.6 A & B - Binary brown dwarf with secondary at 22 Jupiter masses (Allers et al. 2010)

http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2010ApJ...715..561A&db_key=AST&nosetcookie=1

9) ScoPMS 214 or V2505 Oph B - 25 Mj companion 450 AUs away.

http://arxiv.org/abs/0808.2982
http://www.astro.sunysb.edu/metchev/PUBLICATIONS/thesis.pdf
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Edasich on 11th August 2011, 2:55 pm

According to this IOP paper (free access, hopefully), there are some late T-type object whose masses would well fall within 20-25 Jupiter masses upper limit set for EPE:

THE BROWN DWARF KINEMATICS PROJECT. II. DETAILS ON NINE WIDE COMMON PROPER MOTION VERY LOW MASS COMPANIONS TO NEARBY STARS

Here some interesting cases:


- CD-33░ 7795 (or TWA 5) B: Who remembers this young M dwarf? It was featuring in Whatmough's EV Brown Dwarf section. The substellar companion also seems itself binary

- GSC 08047-00232 B, in Horologium-Tucana Association, I think. It would add to AB Pictoris b, wouldn't it?

- LP 261-75 B, in Leo Minor

- HD 203030 B in Vulpecula

Schneider has just added this paper to Bibliography section on August 11. Who knows if in fall August, these are going to feature in the list?

As I am, I add these young objects whose mass equates or is less than 20 Jupiter masses:

- 2MASS J11103481-7722053 B in Chamaeleo. Primary a dM4 (0.27 Solar masses) + secondary 20 Jupiter masses 1,535 AUs away.

I also have got the paper of Kraus & Hillenbrand (2007) with a full table of young stars with widely separated stellar and substellar companions. Oddly the same full table is not viewable in current fulltext of this paper. I don't know if there has been an embargo risk and original draft withdrawn.

http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2007ApJ...662..413K&db_key=AST&nosetcookie=1

It gives, say, star ˛˛ Tau with a 20 Mj companion and XXYY n with 10 Jupiter masses (Stellar objects intentionally hidden).
And many other cases very similar to 1RXS 1609 B.

You can PM me for details btw.

EDIT

Oddly arXiv preprint has the full table. Take a look

http://arxiv.org/abs/astro-ph/0702545
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Edasich on 15th August 2011, 5:50 am

Always accounting new upper mass limit of EPE, so would this B subdwarf (EC 2210-1916) host a massive planetary companion, unless classed as Helium-WD (though inferred radius appears large enough to be planetary)

http://arxiv.org/abs/1104.4202

Adopting the upper limits for P and K, the companion would have to be a brown dwarfwith ≃ 20MJ and a radius of ≃ 0.1R⊙. For inclinations lower than 90◦ the orbital periodof the putative binary must be shorter, because the absolute rotational velocity of the sdBhas to be higher to keep vrot sin i fixed at the observed value.
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Lazarus on 15th August 2011, 12:11 pm

From slightly later in the EC 2210-1916 paper from where you quoted...
These simple calculations show that the possible parameter space of a close and synchronised binary would be extremely narrow (P ≃ 0.1−0.15 d, K ≃ 4−12 km s−1). Furthermore, all possible configurations would lead to photometric variabilities easily visible in the light curve. Close sdB+dM or BD systems are not only often eclipsing, but also show sinusoidal variations due to light from the irradiated surface of the cool companion (e.g. ěstensen et al. 2010; For et al. 2010; Geier et al. 2011a). Due to its high temperature and low surface gravity EC 22018−1916 has a very high luminosity compared to other sdBs, which should lead to a very strong reflection effect at inclinations of ≃ 50░ or higher. Since no variations were found in the ASAS and NSVS light curves (Figure 4), a nearby low-mass companion can be excluded as well.
(emphasis mine)

This would appear to be an exclusion of the planetary hypothesis...
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Edasich on 1st December 2011, 7:22 am

Here some low-mass, imaged substellar companions whose mass should be now classed as "planetary". I think they should be included in Extrasolar Planet Encyclopaedia:

Imaged companions with masses between 8-25 Mj:

- WISEPC J045853.90+643451.9 B: m=10 Mj, a=5 AUs

- 2MASS J13153094-2649513 B: m>16 Mj, a=6.6 AUs

- DENIS-P J185950.9-370632 B: m=13 Mj, a=7.8 AUs

- 2MASS J00413538-5621127 B: m=15 Mj, a=8.9 AUs

- SDSS J224953.47+004404.6 B: m=22 Mj, a=19 AUs

- CD -33 7795 (or TWA 5) B: m=20 Mj, a=100 AUs (itself binary?)

- GSC 08047-00232 B: m=25 Mj, a=200 AUs

- 2MASS J11011926-7732383 B: m=25 Mj, a=240 AUs

- G 196-3 B: m=12-25 Mj, a=320 AUs

- HD 203030 B: m=23 Mj, a=487 AUs

- LP 261-75 B: m=20 Mj, a=820 AUs

- WL 13 (or VSSG 25) C (or (AB)b?): m=17-20 Mj, a=1,400 AUs

- LOri167 B: m=8 Mj, a=2,000 AUs


Others with mass around 25-30 Mj:

- 2MASS J15344984-2952274 B: m=26.9 Mj, a=2.3 AUs

- 2MASS J12255432-2739466 B: m=29 Mj, a=3.17 AUs

- 2MASS J22244381-0158521 B: m=27 Mj, a=75 AUs

- Wolf 940 B: m=28-30 Mj, a=395 AUs


Non-imaged, RV-detected:

- TYC 1240-945-1 B= m=26 Mj, a=0.068 AUs

- MARVELS-1 b: m=28 Mj, a=0.071 *transiting*

- HD 189310 B: m=25.6 Mj, a=0.107 AUs e=0.359

- 59 Draconis B: m=25 Mj, a=0.22 AUs, e=0.2


Substellar degenerates or planets?

- PSR B1957+20 (QX Sge) B: m=22 Mj, a=0.01388 AUs


If somebody wishes to e-mail this list to the EPE website, it's just welcome.
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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Stalker on 14th December 2011, 4:40 am

Hi

I find this on EPE. Have you more information about this star/planet?

http://exoplanet.eu/star.php?st=anonymous#a_publi

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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Sirius_Alpha on 14th December 2011, 1:59 pm

The only reference to that planet I know of is in this paper.

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Re: Unconfirmed/Unpublished Planets Catalogue

Post by Sirius_Alpha on 15th December 2011, 1:04 pm

While reading this paper I came across an interesting paragraph.

A complex two-month-long eclipse observed for the star 1SWASP J140747.93-394542.6 may have been due to a disk surrounding an otherwise-unknown planet, though it is also possible that the occulting disk instead adorns a low-mass stellar companion (Mamajek et al. 2011).

Anyone know anything more?
Edit: found reference to it here.

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Re: Unconfirmed/Unpublished Planets Catalogue

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