论文标题
从假积极地位救出的宜居区域大小的行星
A Habitable-Zone Earth-Sized Planet Rescued from False Positive Status
论文作者
论文摘要
我们报告了在一个名为Kepler-1649的低质量恒星的宜居区中发现了一个地球大小的行星。行星是开普勒-1649 C，为1.06 $^{ +0.15} _ { - 0.10} $乘以地球的大小，并每19.5天过渡其0.1977 +/- 0.0051 MSUN MID M-DWARF主机恒星。它接收到74 +/- 3％的地球入射通量，使其平衡温度为234 +/- 20K，并将其牢固地放置在偶尔宜居区域内。 Kepler-1649还拥有一个以前知名的内部行星，该行星每8.7天绕一次绕，大小和入射通量大致相当于金星。开普勒1649 C最初被开普勒管道归类为假阳性，但作为对所有自动处置开普勒误报的系统视觉检查的一部分而被救出。这一发现突出了人类对行星候选者检查的价值，即使自动化技术有所改善，也暗示，M-dwarfs左右的地球行星可能比更庞大的恒星周围更普遍。
We report the discovery of an Earth-sized planet in the habitable zone of a low-mass star called Kepler-1649. The planet, Kepler-1649 c, is 1.06$^{+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.
