A Double Planetary System around the Evolved Intermediate-mass Star HD 4732
A Double Planetary System around the Evolved Intermediate-mass Star HD 4732
复制标题
围绕演化的中等质量恒星 HD 4732 的双行星系统
DOI：
10.1088/0004-637x/762/1/9
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
et al.
中科院分区：
文献类型：
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作者：
Sato;et al.
本文报道了冈山天体物理观测站和澳大利亚天文观测站通过精确的多普勒测量探测到一个围绕演化中质量星星HD 4732运行的双行星系统。这颗星星是一颗K0次巨星，质量为1.7 M，金属丰度为太阳。该行星系统由两颗巨行星组成，最小质量为msin i= 2.4 M J，轨道周期分别为360.2天和2732天，离心率分别为0.13和0.23。基于对系统动力学稳定性的分析，我们将共面行星构型下行星的质量上限设定为28 M J（i> 5）。
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 msin i= 2.4 M 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> 5) in the case of coplanar prograde configuration.