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arXiv 0902.0667astro-ph.EP
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HD60532,处于3:1平均运动共振的行星系

HD60532, a planetary system in a 3:1 mean motion resonance

J. Laskar, A. C. M. Correia

摘要:

在最近的一篇论文中,报道了一个围绕恒星HD 60532的行星系,由两颗巨行星组成,可能是3:1的平均运动共振,这应该在未来十年内得到证实。在这里,我们表明,系统的全球动态分析可以确认这种共振。目前的最佳拟合数据已经对应于这种谐振配置,并且该系统稳定至少5Gry。3:1共振是如此鲁棒,以至于对于围绕最佳拟合解的各种各样的轨道参数,以及如果系统轨道平面相对于天空平面的倾角小至15度,稳定性仍然是可能的。此外,如果把倾角作为一个自由参数,对观测值进行平差,我们发现倾角约为20 °,对应于伴星的M_b =3.1 M_Jup和M_c = 7.4 M_Jup。

英文摘要:

In a recent paper it was reported a planetary system around the star HD60532, composed by two giant planets in a possible 3:1 mean motion resonance, that should be confirmed within the next decade. Here we show that the analysis of the global dynamics of the system allows to confirm this resonance. The present best fit to data already corresponds to this resonant configuration and the system is stable for at least 5Gry. The 3:1 resonance is so robust that stability is still possible for a wide variety of orbital parameters around the best fit solution and also if the inclination of the system orbital plane with respect to the plane of the sky is as small as 15 deg. Moreover, if the inclination is taken as a free parameter in the adjustment to the observations, we find an inclination ~ 20 deg, which corresponds to M_b =3.1 M_Jup and M_c = 7.4 M_Jup for the planetary companions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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