2015A&A...573A...3J


Query : 2015A&A...573A...3J

2015A&A...573A...3J - Astronomy and Astrophysics, volume 573A, 3-3 (2015/1-1)

A planetary system and a highly eccentric brown dwarf around the giant stars HIP 67851 and HIP 97233.

JONES M.I., JENKINS J.S., ROJO P., MELO C.H.F. and BLUHM P.

Abstract (from CDS):

So far more than 60 substellar companions have been discovered around giant stars. These systems present physical and orbital properties that contrast with those detected orbiting less evolved stars. We are conducting a radial velocity survey of 166 bright giant stars in the southern hemisphere. The main goals of our project are to detect and characterize planets in close-in orbits around giant stars in order to study the effects of the host star evolution on their orbital and physical properties. We have obtained precision radial velocities for the giant stars HIP67851 and HIP97233 that have revealed periodic signals, which are most likely induced by the presence of substellar companions. We present the discovery of a planetary system and an eccentric brown dwarf orbiting the giant stars HIP67851 and HIP97233, respectively. The inner planet around HIP67851 has a period of 88.8-days, a projected mass of 1.4MJ and an eccentricity of 0.09. HIP67851b is one the few known planets orbiting a giant star interior to 0.5AU. Although the orbit of the outer object is not fully constrained, it is likely a super-Jupiter. The brown dwarf around HIP97233 has an orbital period of 1058.8-days, a minimum mass of 20.0MJ and an eccentricity of 0.61. This is the most eccentric known brown dwarf around a giant star.

Abstract Copyright:

Journal keyword(s): techniques: radial velocities - brown dwarfs - planet-star interactions

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 - 2021
#notes
1 CD-36 1052b Pl? 02 47 37.4431031917 -36 06 27.032237736           ~ 7 1
2 HD 121056 RG* 13 53 52.0609887338 -35 18 51.680937317   7.21 6.19     K0III 62 0
3 HD 121056b Pl 13 53 52.0609887338 -35 18 51.680937317           ~ 5 0
4 Kepler-91b Pl 19 02 41.4979092591 +44 07 00.239792240           ~ 66 1
5 Kepler-432b Pl 19 33 07.7292128625 +48 17 09.145380998           ~ 44 0
6 Kepler-56c Pl 19 35 02.0013983772 +41 52 18.691751459           ~ 40 1
7 Kepler-56b Pl 19 35 02.0013983772 +41 52 18.691751459           ~ 48 1
8 HD 186641b Pl 19 45 41.2747019107 -00 41 47.924937458           ~ 4 0
9 HD 186641 RG* 19 45 41.2747019107 -00 41 47.924937458   8.34 7.34     K0/1III 18 0

    Equat.    Gal    SGal    Ecl

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2021.07.29-23:57:47

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