Sirius_Alpha
Admin
Number of posts : 4320
Location : Earth
Registration date : 2008-04-06
 | | Subject: Substellar companions to Evolved stars HD 145457 and HD 180314 17th May 2010, 8:09 pm | |
| Substellar Companions to Evolved Intermediate-Mass Stars: HD 145457 and HD 180314 http://arxiv.org/abs/1005.2860 - Abstract wrote:
- We report the detections of two substellar companions orbiting around evolved intermediate-mass stars from precise Doppler measurements at Subaru Telescope and Okayama Astrophysical Observatory. HD 145457 is a K0 giant with a mass of 1.9 M_sun and has a planet of minimum mass m_2sini=2.9 M_J orbiting with period of P=176 d and eccentricity of e=0.11. HD 180314 is also a K0 giant with 2.6 M_sun and hosts a substellar companion of m_2sin i=22 M_J, which falls in brown-dwarf mass regime, in an orbit with P=396 d and e=0.26. HD 145457 b is one of the innermost planets and HD 180314 b is the seventh candidate of brown-dwarf-mass companion found around intermediate-mass evolved stars.
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Edasich
dK star
Number of posts : 2285
Location : Tau Ceti g - Mid Latitudes
Registration date : 2008-06-02
| | Subject: Re: Substellar companions to Evolved stars HD 145457 and HD 180314 18th May 2010, 11:29 am | |
| More planets and BD from Okayama Planet Search. Still waiting for an orbital solution for star 109 Tauri.  | |
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Planet Table 