Substellar companions to Evolved stars HD 145457 and HD 180314

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Substellar companions to Evolved stars HD 145457 and HD 180314

Post by Sirius_Alpha on 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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Re: Substellar companions to Evolved stars HD 145457 and HD 180314

Post by Edasich on 18th May 2010, 11:29 am

More planets and BD from Okayama Planet Search. Still waiting for an orbital solution for star 109 Tauri. Very Happy
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