A Double Planetary System around the Evolved Intermediate-Mass Star HD 4732

Bun'ei Sato , Masashi Omiya , Robert A. Wittenmyer , Hiroki Harakawa , Makiko Nagasawa , Hideyuki Izumiura , Eiji Kambe , Yoichi Takeda

show 5 more authors

Michitoshi Yoshida Yoichi Itoh Hiroyasu Ando Eiichiro Kokubo Shigeru Ida

Authors on Pith no claims yet

classification 🌌 astro-ph.EP

keywords systemmassplanetarystararounddoubleevolvedintermediate-mass

0 comments

read the original abstract

We report the detection of a double planetary system orbiting around the evolved intermediate-mass star HD 4732 from precise Doppler measurements at Okayama Astrophysical Observatory (OAO) and Anglo-Australian Observatory (AAO). The star is a K0 subgiant with a mass of 1.7 M_sun and solar metallicity. The planetary system is composed of two giant planets with minimum mass of msini=2.4 M_J, orbital period of 360.2 d and 2732 d, and eccentricity of 0.13 and 0.23, respectively. Based on dynamical stability analysis for the system, we set the upper limit on the mass of the planets to be about 28 M_J (i>5 deg) in the case of coplanar prograde configuration.

This paper has not been read by Pith yet.

A Double Planetary System around the Evolved Intermediate-Mass Star HD 4732

discussion (0)