A double planetary system around the evolved intermediate-mass star HD 4732

Sato, Bun'Ei and Omiya, Masashi and Wittenmyer, Robert A. and Harakawa, Hiroki and Nagasawa, Makiko and Izumiura, Hideyuki and Kambe, Eiji and Takeda, Yoichi and Yoshida, Michitoshi and Itoh, Yoichi and Ando, Hiroyasu and Kokubo, Eiichiro and Ida, Shigeru (2013) A double planetary system around the evolved intermediate-mass star HD 4732. The Astrophysical Journal, 762 (1). ISSN 0004-637X

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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 1.7 M⊙ and solar metallicity. The planetary system is composed of two giant planets with minimum mass of m sin i = 2.4 MJ, 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 MJ (i greater than 5°) in the case of coplanar prograde configuration.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Access to Published version allowed due to publisher copyright policy.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 19 May 2017 05:48
Last Modified: 02 Nov 2017 04:41
Uncontrolled Keywords: planetary systems; individual stars(HD 4732); techniques - radial velocities;
Fields of Research (2008): 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510109 Stellar astronomy and planetary systems
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: https://doi.org/10.1088/0004-637X/762/1/9
URI: http://eprints.usq.edu.au/id/eprint/31773

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