2011A&A...526A.141F


C.D.S. - SIMBAD4 rel 1.7 - 2019.09.21CEST16:07:23

2011A&A...526A.141F - Astronomy and Astrophysics, volume 526A, 141-141 (2011/2-1)

The HARPS search for southern extra-solar planets. XXVI. Two giant planets around M0 dwarfs.

FORVEILLE T., BONFILS X., LO CURTO G., DELFOSSE X., UDRY S., BOUCHY F., LOVIS C., MAYOR M., MOUTOU C., NAEF D., PEPE F., PERRIER C., QUELOZ D. and SANTOS N.

Abstract (from CDS):

Fewer giants planets are found around M dwarfs than around more massive stars, and this dependence of planetary characteristics on the mass of the central star is an important observational diagnostic of planetary formation theories. In part to improve on those statistics, we are monitoring the radial velocities of nearby M dwarfs with the HARPS spectrograph on the ESO 3.6m telescope. We present here the detection of giant planets around two nearby M0 dwarfs: planets, with minimum masses of respectively 5 Jupiter masses and 1 Saturn mass, orbit around Gl 676A and HIP 12961. The latter is, by over a factor of two, the most massive planet found by radial velocity monitoring of an M dwarf, but its being found around an early M-dwarf is in approximate line with the upper envelope of the planetary vs stellar mass diagram. HIP 12961 ([Fe/H]=-0.07) is slightly more metal-rich than the average solar neighborhood ([Fe/H]=-0.17), and Gl 676A ([Fe/H]=0.18) significantly so. The two stars together therefore reinforce the growing trend for giant planets being more frequent around more metal-rich M dwarfs, and the 5 Jupiter mass Gl 676Ab being found around a metal-rich star is consistent with the expectation that the most massive planets preferentially form in disks with large condensate masses.

Abstract Copyright:

Journal keyword(s): stars: individual: Gl 676A - stars: individual: HIP 12961 - planetary systems - stars: late-type - techniques: radial velocities - stars: low-mass

VizieR on-line data: <Available at CDS (J/A+A/526/A141): table3.dat table4.dat>

Simbad objects: 9

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Number of rows : 9

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 HD 236362 * 00 16 10.8868307753 +55 52 04.891994912 9.430 9.430 9.010     F5 8 0
2 CD-23 1056 PM* 02 46 42.8866903919 -23 05 11.802472662 12.911 11.651 10.237 9.36 8.544 K5V 40 1
3 NAME LP 804-27b Pl 16 12 41.7802216507 -18 52 31.811210360           ~ 13 1
4 LP 804-27 PM* 16 12 41.7802216507 -18 52 31.811210360 14.015 12.88 11.372 10.289 9.37 M3V 48 1
5 CD-51 10924 PM* 17 30 11.2030058822 -51 38 13.139736838 12.317 11.028 9.585 8.675 8.60 M0V 70 1
6 L 269-24 PM* 17 30 16.2383509908 -51 38 22.594848168   15.05 13.37 13.03 10.49 M3 18 0
7 NAME EWS 2005-BUL-071b Pl 17 50 09.77 -34 40 23.5           ~ 36 1
8 BD-15 6290 BY* 22 53 16.7323107416 -14 15 49.303409936 12.928 11.749 10.192 9.013 7.462 M3.5V 824 1
9 BD-15 6290b Pl 22 53 16.73352 -14 15 49.3186           ~ 215 1

    Equat.    Gal    SGal    Ecl

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2019.09.21-16:07:23

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