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arXiv 2112.02414astro-ph.EPastro-ph.GA
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系统的KMTNet行星Anomaly搜索,论文III:一颗宽轨道行星和两颗恒星双星

Systematic KMTNet Planetary Anomaly Search, Paper III: One Wide-Orbit Planet And Two Stellar Binaries

Hanyue Wang, Weicheng Zang, Wei Zhu, Kyu-Ha Hwang, Andrzej Udalski, Andrew Gould, Cheongho Han, Michael D. Albrow, Sun-Ju Chung, Youn Kil Jung, Doeon Kim, Yoon-… 展开作者

Hanyue Wang, Weicheng Zang, Wei Zhu, Kyu-Ha Hwang, Andrzej Udalski, Andrew Gould, Cheongho Han, Michael D. Albrow, Sun-Ju Chung, Youn Kil Jung, Doeon Kim, Yoon-Hyun Ryu, In-Gu Shin, Yossi Shvartzvald, Jennifer C. Yee, Sang-Mok Cha, Dong-Jin Kim, Hyoun-Woo Kim, Seung-Lee Kim, Chung-Uk Lee, Dong-Joo Lee, Yongseok Lee, Byeong-Gon Park, Richard W. Pogge, Radoslaw Poleski, Przemek Mróz, Jan Skowron, Michał K. Szymański, Igor Soszyński, Paweł Pietrukowicz, Szymon Kozłowski, Krzysztof Ulaczyk, Krzysztof A. Rybicki, Patryk Iwanek, Marcin Wrona, Mariusz Gromadzki, Hongjing Yang, Shude Mao, Xiangyu Zhang

摘要:

只有少数围绕古老恒星的宽轨道行星被发现,这限制了我们对这颗行星人口的统计理解。继韩国微透镜望远镜网络(KMTNet)发现的微透镜事件中的行星异常的系统搜索之后,我们提出了三个最初被认为包含宽轨道行星的事件的发现和分析。OGLE-2018-BLG-0383光变曲线的异常特征是由质量比为$q=2.1\times 10^{-4}$的行星和投影分离$s=2.45$造成的。这使其成为如此宽轨道上质量比最低的微透镜行星。另外两个事件,KMT-2018-BLG-0998和OGLE-2018-BLG-0271,被证明是恒星双星($q>0.1$),具有相当接近的($s<1$)分离。我们简要地讨论了已知的宽轨道微透镜行星的性质,并表明,调查观察是至关重要的发现和进一步统计约束这样的行星人口。

英文摘要:

Only a few wide-orbit planets around old stars have been detected, which limits our statistical understanding of this planet population. Following the systematic search for planetary anomalies in microlensing events found by the Korea Microlensing Telescope Network (KMTNet), we present the discovery and analysis of three events that were initially thought to contain wide-orbit planets. The anomalous feature in the light curve of OGLE-2018-BLG-0383 is caused by a planet with mass ratio $q=2.1\times 10^{-4}$ and a projected separation $s=2.45$. This makes it the lowest mass-ratio microlensing planet at such wide orbits. The other two events, KMT-2018-BLG-0998 and OGLE-2018-BLG-0271, are shown to be stellar binaries ($q>0.1$) with rather close ($s<1$) separations. We briefly discuss the properties of known wide-orbit microlensing planets and show that the survey observations are crucial in discovering and further statistically constraining such a planet population.

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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