A DOUBLE PLANETARY SYSTEM AROUND THE EVOLVED INTERMEDIATE-MASS STAR HD 4732

作者：Sato Bun' ei^*; Omiya Masashi; Wittenmyer Robert A; Harakawa Hiroki; Nagasawa Makiko; Izumiura Hideyuki; Kambe Eiji; Takeda Yoichi; Yoshida Michitoshi; Itoh Yoichi; Ando Hiroyasu; Kokubo Eiichiro; Ida Shigeru

来源：Astrophysical Journal, 2013, 762(1): 9.

DOI：10.1088/0004-637X/762/1/9

• planetary systems
• stars: individual (HD 4732)
• techniques: radial velocities

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 and Australian Astronomical Observatory. The star is a K0 subgiant with a mass of 1.7M(circle dot) and solar metallicity. The planetary system is composed of two giant planets with minimum mass of m sin i = 2.4M(J), orbital period of 360.2 days and 2732 days, 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 %26gt; 5 degrees) in the case of coplanar prograde configuration.

• 出版日期2013-1-1
• 单位中国科学院国家天文台