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arXiv 2502.04436astro-ph.EPastro-ph.IMastro-ph.SR
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来自NASA K2任务的行星质量、半径与轨道

Planet Masses, Radii, and Orbits from NASA's K2 Mission

Andrew W. Howard, Evan Sinukoff, Sarah Blunt, Erik A. Petigura, Ian J. M. Crossfield, Howard Isaacson, Molly Kosiarek, Ryan A. Rubenzahl, John M. Brewer, Benjam… 展开作者

Andrew W. Howard, Evan Sinukoff, Sarah Blunt, Erik A. Petigura, Ian J. M. Crossfield, Howard Isaacson, Molly Kosiarek, Ryan A. Rubenzahl, John M. Brewer, Benjamin J. Fulton, Courtney D. Dressing, Lea A. Hirsch, Heather Knutson, John H. Livingston, Sean M. Mills, Arpita Roy, Lauren M. Weiss, Bjorn Benneke, David R. Ciardi, Jessie L. Christiansen, William D. Cochran, Justin R. Crepp, Erica Gonzales, Brad M. S. Hansen, Kevin Hardegree-Ullman, Steve B. Howell, Sébastien Lépine, Arturo O. Martinez, Leslie A. Rogers, Joshua E. Schlieder, Michael Werner, Alex S. Polanski, Isabel Angelo, Corey Beard, Aida Behmard, Luke G. Bouma, Casey L. Brinkman, Ashley Chontos, Fei Dai, Paul A. Dalba, Steven Giacalone, Samuel K. Grunblatt, Michelle L. Hill, Stephen R. Kane, Jack Lubin, Andrew W. Mayo, Teo Mocnik, Joseph M. Akana Murphy, Malena Rice, Lee J. Rosenthal, Dakotah Tyler, Judah Van Zandt, Samuel W. Yee

AI总结:

本文基于NASA K2测光与地面多普勒后续观测,统一分析并发布了55颗恒星周围86颗行星的质量、半径和轨道参数,为系外行星系统统计研究提供一致化星表。

摘要:

我们报告了NASA K2任务观测的55颗恒星周围86颗行星的质量、大小和轨道性质,并利用W. M. Keck天文台的HIRES光谱仪和Lick天文台的Automated Planet Finder进行了后续多普勒测量。其中81颗行星是通过K2测光数据中的凌星现象发现的,另外5颗则是基于对凌星行星宿主恒星的后续多普勒测量发现的。这些凌星行星的大小范围从地球大小到大于木星(1-3个地球半径较为典型),轨道周期从不到一天到几个月不等。对于其中32颗行星,多普勒信号的探测显著性超过5-sigma(51颗以超过3-sigma的显著性被探测到)。该星表的一个重要特点是采用统一的分析程序来确定恒星和行星性质,包括应用于K2测光数据的凌星搜索与拟合程序、应用于视向速度的多普勒拟合技术,以及用于确定恒星整体参数的能谱建模。这种统一的处理方式将使该星表有助于对系外行星系统的质量、密度和系统结构进行统计研究。本工作还作为我们团队为这些系统获得的所有先前未发表的视向速度数据及相关恒星活动指标的数据发布,同时提供推导得到的恒星和行星参数。

英文摘要:

We report the masses, sizes, and orbital properties of 86 planets orbiting 55 stars observed by NASA's K2 Mission with follow-up Doppler measurements by the HIRES spectrometer at the W. M. Keck Observatory and the Automated Planet Finder at Lick Observatory. Eighty-one of the planets were discovered from their transits in the K2 photometry, while five were found based on subsequent Doppler measurements of transiting planet host stars. The sizes of the transiting planets range from Earth-size to larger than Jupiter (1-3 REarth is typical), while the orbital periods range from less than a day to a few months. For 32 of the planets, the Doppler signal was detected with significance greater than 5-sigma (51 were detected with >3-sigma significance). An important characteristic of this catalog is the use of uniform analysis procedures to determine stellar and planetary properties. This includes the transit search and fitting procedures applied to the K2 photometry, the Doppler fitting techniques applied to the radial velocities, and the spectral modeling to determine bulk stellar parameters. Such a uniform treatment will make the catalog useful for statistical studies of the masses, densities, and system architectures of exoplanetary systems. This work also serves as a data release for all previously unpublished RVs and associated stellar activity indicators obtained by our team for these systems, along with derived stellar and planet parameters.

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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