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arXiv 2203.02087astro-ph.EPastro-ph.SR
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缩放K2。五、K2活动中60颗新系外行星的统计验证2-18

Scaling K2. V. Statistical Validation of 60 New Exoplanets From K2 Campaigns 2-18

Jessie L. Christiansen, Sakhee Bhure, Jon K. Zink, Kevin K. Hardegree-Ullman, Britt Duffy Adkins, Christina Hedges, Timothy D. Morton, Allyson Bieryla, David R.… 展开作者

Jessie L. Christiansen, Sakhee Bhure, Jon K. Zink, Kevin K. Hardegree-Ullman, Britt Duffy Adkins, Christina Hedges, Timothy D. Morton, Allyson Bieryla, David R. Ciardi, William D. Cochran, Courtney D. Dressing, Mark E. Everett, Howard Isaacson, John H. Livingston, Carl Ziegler, Perry Berlind, Michael L. Calkins, Gilbert A. Esquerdo, David W. Latham, Michael Endl, Phillip J. MacQueen, Benjamin J. Fulton, Lea A. Hirsch, Andrew W. Howard, Lauren M. Weiss, Bridgette E. Allen, Arthur Berberyann, Krys N. Ciardi, Ava Dunlavy, Sofia H. Glassford, Fei Dai, Teruyuki Hirano, Motohide Tamura, Charles Beichman, Erica J. Gonzales, Joshua E. Schlieder, Thomas Barclay, Ian J. M. Crossfield, Emily A. Gilbert, Elisabeth C. Matthews, Steven Giacalone, Erik A. Petigura

摘要:

从开普勒望远镜硬件故障中抢救出来的NASA K2任务继续了开普勒的行星搜索成功。它已经揭示了近500个围绕黄道面的凌日行星,其中许多是进一步研究的主题,以及超过1000个额外的候选者。在这里,我们介绍了一个正在进行的项目的结果,以跟踪和统计验证新的K2行星,特别是确定有前途的新目标,以进一步表征。通过分析侦察光谱,高分辨率成像,质心变化和91个候选者信号的统计可能性,我们在46个系统中验证了60个新行星。其中包括:许多行星都可以用透射光谱仪(K2-384 f、K2-387 b、K2-390 b、K2-403 b和K2-398 c),发射光谱(K2-371 b、K2-370 b和K2-399 b),以及两者(K2-405 b和K2-406 b);几个行星处于或接近平均运动共振的系统(K2-381,K2-398)包括一个紧凑的,TRAPPIST-1类似的五颗小行星系统,围绕一颗中M矮星(K2-384)运行;在炎热的土星沙漠中的超短周期子土星(K2-399 b);以及一颗围绕中等亮度(V=11.93)、贫金属([Fe/H]=-0.579+/-0.080)的主星(K2-408 b)运行的超级地球。我们总共验证了4颗F星,26颗G星,13颗K星和3颗M矮星周围的行星。此外,我们还提供了37个经过审查的行星候选者名单,这些候选者应该优先考虑未来的后续观测,以便得到确认或验证。

英文摘要:

The NASA K2 mission, salvaged from the hardware failures of the Kepler telescope, has continued Kepler's planet-hunting success. It has revealed nearly 500 transiting planets around the ecliptic plane, many of which are the subject of further study, and over 1000 additional candidates. Here we present the results of an ongoing project to follow-up and statistically validate new K2 planets, in particular to identify promising new targets for further characterization. By analyzing the reconnaissance spectra, high-resolution imaging, centroid variations, and statistical likelihood of the signals of 91 candidates, we validate 60 new planets in 46 systems. These include: a number of planets amenable to transmission spectroscopy (K2-384 f, K2-387 b, K2-390 b, K2-403 b, and K2-398 c), emission spectroscopy (K2-371 b, K2-370 b, and K2-399 b), and both (K2-405 b and K2-406 b); several systems with planets in or close to mean motion resonances (K2-381, K2-398) including a compact, TRAPPIST-1-like system of five small planets orbiting a mid-M dwarf (K2-384); an ultra-short period sub-Saturn in the hot Saturn desert (K2-399 b); and a super-Earth orbiting a moderately bright (V=11.93), metal-poor ([Fe/H]=-0.579+/-0.080) host star (K2-408 b). In total we validate planets around 4 F stars, 26 G stars, 13 K stars, and 3 M dwarfs. In addition, we provide a list of 37 vetted planet candidates that should be prioritized for future follow-up observation in order to be confirmed or validated.

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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