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BIBTEX RIS

DETECTION OF A LOW-ECCENTRICITY AND SUPER-MASSIVE PLANET TO THE SUBGIANT HD 38801

2010; IOP Publishing; Volume: 715; Issue: 1 Linguagem: Inglês

10.1088/0004-637x/715/1/550

ISSN

1538-4357

Autores

Hiroki Harakawa, Bun’ei Sato, Debra A. Fischer, Shigeru Ida, Masashi Omiya, John Asher Johnson, Geoffrey W. Marcy, Eri Toyota, Yasunori Hori, Andrew W. Howard,

Tópico(s)

Astronomy and Astrophysical Research

Resumo

We report the detection of a large mass planet orbiting around the K0 metal-rich subgiant HD38801 ($V=8.26$) by precise radial velocity (RV) measurements from the Subaru Telescope and the Keck Telescope. The star has a mass of $1.36M_{\odot}$ and metallicity of [Fe/H]= +0.26. The RV variations are consistent with a circular orbit with a period of 696.0 days and a velocity semiamplitude of 200.0\mps, which yield a minimum-mass for the companion of $10.7\mjup$ and semimajor axis of 1.71 AU. Such super-massive objects with very low-eccentricities and hundreds of days period are uncommon among the ensemble of known exoplanets.

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