arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0708.0832astro-ph
收藏

类地轨道上的两颗类木行星

Two Jovian-Mass Planets in Earthlike Orbits

Sarah E. Robinson, Gregory Laughlin, Steven S. Vogt, Debra A. Fischer, R. Paul Butler, Geoffrey W. Marcy, Gregory W. Henry, Peter Driscoll, Genya Takeda, John A. Johnson

摘要:

我们报告发现了两颗新的行星:一颗1.94 M_Jup的行星在HD 5319的1.8年轨道上,另一颗2.51 M_Jup的行星在HD 75898的1.1年轨道上。HD 5319 b和HD 75898 b的测量偏心率分别为0.12和0.10,基于导出的轨道参数的马尔可夫链蒙特卡罗模拟表明,这两颗恒星的径向速度与圆形行星轨道一致。由于离心率低,1 < a < 2 AU,我们的新行星的轨道与太阳系中的类地行星相似。这两颗恒星的径向速度残差有显着的趋势,可能是由亚恒星或低质量的恒星同伴。

英文摘要:

We report the discovery of two new planets: a 1.94 M_Jup planet in a 1.8-year orbit of HD 5319, and a 2.51 M_Jup planet in a 1.1-year orbit of HD 75898. The measured eccentricities are 0.12 for HD 5319 b and 0.10 for HD 75898 b, and Markov Chain Monte Carlo simulations based on derived orbital parameters indicate that the radial velocities of both stars are consistent with circular planet orbits. With low eccentricity and 1 < a < 2 AU, our new planets have orbits similar to terrestrial planets in the solar system. The radial velocity residuals of both stars have significant trends, likely arising from substellar or low-mass stellar 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。

↑