A Planetary Mass Companion to the K0 Giant HD 17092

1); 2); (2) The Pennsylvania State University; (3) Nicolaus Copernicus Astronomical Center; (4) Spitzer Science Center; (5) Jet Propulsion Laboratory; (6) McDonald Observatory; A. Niedzielski (1; A. Wolszczan (2; California Institute of Technology

arxiv: 0705.0935 · v1 · submitted 2007-05-07 · 🌌 astro-ph

A Planetary Mass Companion to the K0 Giant HD 17092

A. Niedzielski (1 , 2) , M. Konacki (3) , A. Wolszczan (2 , 1) , G. Nowak (1) , G. Maciejewski (1) , R.C. Gelino (4)

show 11 more authors

M. Shao (5) M. Shetrone (6) L.W. Ramsey (2) ((1) Torun Centre for Astronomy Poland (2) The Pennsylvania State University (3) Nicolaus Copernicus Astronomical Center (4) Spitzer Science Center (5) Jet Propulsion Laboratory California Institute of Technology (6) McDonald Observatory University of Texas)

This is my paper

classification 🌌 astro-ph

keywords aroundcompanionmassplanetplanetarygiantobservedstar

0 comments

read the original abstract

We report the discovery of a substellar-mass companion to the K0-giant HD 17092 with the Hobby-Eberly Telescope. In the absence of any correlation of the observed 360-day periodicity with the standard indicators of stellar activity, the observed radial velocity variations are most plausibly explained in terms of a Keplerian motion of a planetary-mass body around the star. With the estimated stellar mass of 2.3Msun, the minimum mass of the planet is 4.6MJ. The planet's orbit is characterized by a mild eccentricity of e=0.17 and a semi-major axis of 1.3 AU. This is the tenth published detection of a planetary companion around a red giant star. Such discoveries add to our understanding of planet formation around intermediate-mass stars and they provide dynamical information on the evolution of planetary systems around post-main sequence stars.

This paper has not been read by Pith yet.

A Planetary Mass Companion to the K0 Giant HD 17092

discussion (0)