32 planets from HARPS

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Re: 32 planets from HARPS

Post by Edasich on 30th March 2010, 4:30 am

A second (unconfirmed) planet pops up around HIP 5158:

http://exoplanet.eu/star.php?st=HIP+5158

I ignore why Schneider types "third planet". Rolling Eyes
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Re: 32 planets from HARPS

Post by Lazarus on 30th March 2010, 11:58 am

The paper for HIP 5158 (and HD 125612, HD 215497) is currently freely available from A&A under the Latest Articles Free scheme.

Link
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Eight new Jovians from HARPS

Post by Sirius_Alpha on 29th August 2010, 8:07 pm

The HARPS search for southern extrasolar planets. XXIII. 8 planetary companions to low-activity solar-type stars
http://arxiv.org/abs/1008.4600

Abstract wrote:In this paper, we present our HARPS radial-velocity data for eight low-activity solar-type stars belonging to the HARPS volume-limited sample: HD6718, HD8535, HD28254, HD290327, HD43197, HD44219, HD148156, and HD156411. Keplerian fits to these data reveal the presence of low-mass companions around these targets. With minimum masses ranging from 0.58 to 2.54 MJup, these companions are in the planetary mass domain. The orbital periods of these planets range from slightly less than one to almost seven years. The eight orbits presented in this paper exhibit a wide variety of eccentricities: from 0.08 to above 0.8.

HD 28254 and HD 44219 are reported to have an RV drift.

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Re: 32 planets from HARPS

Post by Mongo on 29th August 2010, 9:52 pm

From the above report:

PLANET -- MASS (MJ sin i) -- PERIOD (days) -- ECCENTRICITY

HD6718 b -- 1.56 -- 2496 -- 0.1
HD8535 b -- 0.68 -- 1313 -- 0.15
HD28254 b -- 1.16 -- 1116 -- 0.81 (additional long-term RV drift, possibly from known stellar companion)
HD43197 b -- 0.60 -- 327 -- 0.83
HD44219 b -- 0.58 -- 272 -- 0.61 (additional long-term RV drift)
HD148156 b -- 0.65 -- 1027 -- 0.52
HD156411 b -- 0.74 -- 842 -- 0.22
HD290327 b -- 2.54 -- 2442 -- 0.08
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Re: 32 planets from HARPS

Post by Edasich on 30th August 2010, 3:59 am

There are the M dwarf planet hosts left to be officially released.
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Re: 32 planets from HARPS

Post by tommi59 on 30th August 2010, 4:43 am

Eccentricity of HD43197 b,HD44219 b are so high that this rules out possibility existence of any planet(especially earthlike) on stable orbit in HZ of these 2 stars
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Re: 32 planets from HARPS

Post by Sirius_Alpha on 5th October 2010, 8:24 pm

The HARPS search for southern extra-solar planets. XXIV. Companions to HD 85390, HD 90156 and HD 103197: A Neptune analogue and two intermediate mass planets
http://arxiv.org/abs/1010.0856

We report the detection of three new extrasolar planets orbiting the solar type stars HD 85390, HD 90156 and HD 103197 with the HARPS spectrograph mounted on the ESO 3.6-m telescope at La Silla observatory. HD 85390 has a planetary companion with a projected intermediate mass (42.0 Earth masses) on a 788-day orbit (a=1.52 AU) with an eccentricity of 0.41, for which there is no analogue in the solar system. A drift in the data indicates the presence of another companion on a long period orbit, which is however not covered by our measurements. HD 90156 is orbited by a warm Neptune analogue with a minimum mass of 17.98 Earth masses (1.05 Neptune masses), a period of 49.8 days (a=0.25 AU) and an eccentricity of 0.31. HD 103197 has an intermediate mass planet on a circular orbit (P=47.8 d, Msini=31.2 Earth masses). We discuss the formation of planets of intermediate mass (about 30-100 Earth masses) which should be rare inside a few AU according to core accretion formation models.

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Re: 32 planets from HARPS

Post by Edasich on 6th October 2010, 7:39 am

Eccentric low-mass planets. Interesting HD 103197 b is the only one with circular orbit.
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Re: 32 planets from HARPS

Post by Lazarus on 6th October 2010, 1:44 pm

Well it's been nearly a year since the original press release, I'm starting to lose track of which planets have and haven't been published. Taking the list from this post, I get the following list...
StarPlanetStatusDateLink
HD5388bPublishedMarch 2010(link)
HD181720bPublishedMarch 2010(link)
HD190984bPublishedMarch 2010(link)
HD6718bPublishedNovember 2010(link)
HD8535bPublishedNovember 2010(link)
HD28254bPublishedNovember 2010(link)
HD290327bPublishedNovember 2010(link)
HD43197bPublishedNovember 2010(link)
HD44219bPublishedNovember 2010(link)
HD148156bPublishedNovember 2010(link)
HD156411bPublishedNovember 2010(link)
HIP103019b?!
HIP5158bPublishedMarch 2010(link)
HD125612cPublishedMarch 2010(link)
HD125612dPublishedMarch 2010(link)
HD215497bPublishedMarch 2010(link)
HD215497cPublishedMarch 2010(link)
BD-08 2823bPublishedMarch 2010(link)
BD-08 2823cPublishedMarch 2010(link)
HD85390bPublishedFebruary 2011(link)
HD90156bPublishedFebruary 2011(link)
HD103197bPublishedFebruary 2011(link)
HD103197c?!
HD9578b?!
HD63765bPreprintJuly 2011(link)
HD104067bPreprintJuly 2011(link)
HD125595bPreprintJuly 2011(link)
HIP70849bPreprintJuly 2011(link)
GJ433b
GJ667Cb
HIP12961bPublishedFebruary 2011(link)
GJ676AbPublishedFebruary 2011(link)
If I've missed any, let me know.

(Also, what happened to HD 103197c?)


Last edited by Lazarus on 5th July 2011, 1:07 am; edited 5 times in total (Reason for editing : Added preprint for HD63765 to HIP 70849)
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Re: 32 planets from HARPS

Post by Edasich on 6th October 2010, 3:36 pm

Good idea. It's likely there are still three or four paper left to be released. Forveille, Delfosse and maybe two of Segransan, I suppose.

Surely the most tantalizing is that about Gj 433 b and GJ 676 Cb, pals.
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Re: 32 planets from HARPS

Post by Lazarus on 6th October 2010, 7:18 pm

Also to point out is HIP 103019, that was initially listed as being part of the Naef et al. paper (along with the planets listed in rows HD 6718b to HD 156411b), but it isn't there. I've flagged this one with ?! as well.
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Re: 32 planets from HARPS

Post by Sirius_Alpha on 15th October 2010, 6:35 am

They stab us deeper.

Gliese 433 b is now uconfirmed as listed by the EPE.

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Re: 32 planets from HARPS

Post by Edasich on 15th October 2010, 7:18 am

And with no reason too
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Re: 32 planets from HARPS

Post by Borislav on 15th October 2010, 7:29 am

The same fate to comprehend and GJ 667С b.

But we caught up now 2009 year the number of discoveries - 81 new planets in 2010!

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Re: 32 planets from HARPS

Post by tommi59 on 15th October 2010, 8:49 am

Anyway this is not good sign gliese 581g,f gliese433b ,gliese667Cb going to be unconfirmed or retracted-what is going on -all of them are low mass planets
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Re: 32 planets from HARPS

Post by Edasich on 15th October 2010, 9:00 am

Usually there is a footnote explaining the reason for retraction. In this case not. Question
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Re: 32 planets from HARPS

Post by Lazarus on 15th October 2010, 11:21 am

I guess it was something presented at the IAU Symposium. These low-mass planets are really pushing the capabilities of the detectors, quite low signal-to-noise ratios. Plus the tendency for low-mass planets to be found in multi-planet systems cannot help.

Moral of the story: finding low-mass planets is difficult.
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Re: 32 planets from HARPS

Post by Edasich on 6th December 2010, 1:28 pm

Guess who's back? Back again?

http://exoplanet.eu/star.php?st=GJ+667C

http://exoplanet.eu/star.php?st=GJ+433
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Re: 32 planets from HARPS

Post by Daniel on 6th December 2010, 1:45 pm

why ? i don't understand,is there any publish paper about this planets? anything that would explain this?
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Re: 32 planets from HARPS

Post by Sirius_Alpha on 6th December 2010, 2:39 pm

YAY Very Happy

Daniel wrote:why ? i don't understand,is there any publish paper about this planets? anything that would explain this?
Their discovery papers are not published. Best I can give is they double-checked something, suddenly became less sure, then later became more sure. We'll know more when their papers come out.

But we might be able to expect the data soon..
From
http://tamise.ujf-grenoble.fr/wws/arc/exoplanets/2009-10/msg00002.html
Data from Bonfils (papers by Forveille et al. and Delfosse et al., submitted):

GJ 433 b M = 0.019 M_Jup P = 7 days
GJ 667C b 0.018 7
HIP 12961 b 0.47 57
GJ 676A b 4 1000

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Re: 32 planets from HARPS

Post by lodp on 6th December 2010, 9:43 pm

The HARPS search for southern extra-solar planets: XXVIII. Two giant planets around M0 dwarfs http://arxiv.org/PS_cache/arxiv/pdf/1012/1012.1168v1.pdf
GJ 676A & HIP12961


Last edited by Sirius_Alpha on 6th December 2010, 9:50 pm; edited 1 time in total (Reason for editing : Corrected link -- Sirius_Alpha)

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Re: 32 planets from HARPS

Post by Lazarus on 7th December 2010, 2:12 pm

Added to the table
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Re: 32 planets from HARPS

Post by Borislav on 17th December 2010, 11:56 am

http://arxiv.org/abs/1012.3640
Interesting article. Of the 23 red dwarfs "high resolution spectra which span around six years, from 2003 to 2009" there are 11 planetary systems.

with giant planets
Gl832 (2008)
Gl849 (2006)
Gl876 (1998)
HIP12961 (2009)
HIP85647 (2009)

without giant planets
Gl176 (2008)
Gl433 (2009)
Gl436 (2004)
Gl581 (2005)
Gl667C (2009)
Gl674 (2007)

This gives a more higher frequency planets around red dwarf stars, even than this figure.
http://online.kitp.ucsb.edu/online/exoplanets_c10/mayor/oh/17.html

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Re: 32 planets from HARPS

Post by Edasich on 16th February 2011, 5:53 am

HARPS finds planets, other like discard them

http://exoplanet.eu/star.php?st=HD+5388

Brown dwarf. From 1.96 Mj to 69 Mj object seems quite an enormous bounce...
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Re: 32 planets from HARPS

Post by matthew24 on 16th February 2011, 6:42 pm

Edasich wrote:HARPS finds planets, other like discard them

http://exoplanet.eu/star.php?st=HD+5388

Brown dwarf. From 1.96 Mj to 69 Mj object seems quite an enormous bounce...

69 mj would put it within red dwarf range

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Re: 32 planets from HARPS

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