arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.06725astro-ph.EPastro-ph.IMastro-ph.SR
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一颗宜居带地球大小的行星从假阳性状态中获救

A Habitable-Zone Earth-Sized Planet Rescued from False Positive Status

Andrew Vanderburg, Pamela Rowden, Steve Bryson, Jeffrey Coughlin, Natalie Batalha, Karen A. Collins, David W. Latham, Susan E. Mullally, Knicole D. Colón, Chris… 展开作者

Andrew Vanderburg, Pamela Rowden, Steve Bryson, Jeffrey Coughlin, Natalie Batalha, Karen A. Collins, David W. Latham, Susan E. Mullally, Knicole D. Colón, Chris Henze, Chelsea X. Huang, Samuel N. Quinn

摘要:

我们报告在一颗名为开普勒-1649的低质量恒星的宜居带发现了一颗地球大小的行星。开普勒1649 c的大小是地球的1.06 $^{+0.15}_{-0.10}$倍,每19.5天经过0.1977 +/- 0.0051 Msun的中M矮星。它接收到地球74 +/-3%的入射通量,使它的平衡温度为234 +/-20 K,并将其牢牢地置于星周宜居带内。开普勒-1649还拥有一颗以前已知的内行星,每8.7天绕一圈,其大小和入射通量大致相当于金星。开普勒-1649 c最初被开普勒管道归类为假阳性,但作为对所有自动处置的开普勒假阳性的系统性目视检查的一部分而被拯救。这一发现突出了人类对行星候选者进行检查的价值,即使自动化技术得到了改进,并暗示围绕中晚期M矮星的类地行星可能比围绕更大质量恒星的行星更常见。

英文摘要:

We report the discovery of an Earth-sized planet in the habitable zone of a low-mass star called Kepler-1649. The planet, Kepler-1649 c, is 1.06$^{+0.15}_{-0.10}$ times the size of Earth and transits its 0.1977 +/- 0.0051 Msun mid M-dwarf host star every 19.5 days. It receives 74 +/- 3 % the incident flux of Earth, giving it an equilibrium temperature of 234 +/- 20K and placing it firmly inside the circumstellar habitable zone. Kepler-1649 also hosts a previously-known inner planet that orbits every 8.7 days and is roughly equivalent to Venus in size and incident flux. Kepler-1649 c was originally classified as a false positive by the Kepler pipeline, but was rescued as part of a systematic visual inspection of all automatically dispositioned Kepler false positives. This discovery highlights the value of human inspection of planet candidates even as automated techniques improve, and hints that terrestrial planets around mid to late M-dwarfs may be more common than those around more massive stars.

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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