文章基本信息

标题：An Estimate of the Yield of Single-transit Planetary Events from the Transiting Exoplanet Survey Satellite
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作者：Steven Villanueva ; Diana Dragomir ; B. Scott Gaudi 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2019
卷号：157
期号：2
页码：1-11
DOI：10.3847/1538-3881/aaf85e
语种：English
出版社：American Institute of Physics
摘要：We present a semianalytic estimate of the expected yield of single-transit planets from the Transiting Exoplanet Survey Satellite (TESS). We use the TESS Candidate Target List-6 (CTL-6) as an input catalog of over four million sources. We predict that from the 200,000 stars selected to be observed with the high-cadence postage stamps (PSs) with the highest CTL-6 priority, there will be 241 single-transit events caused by planets detectable at a signal-to-noise ratio of S/N7.3. We find a lower limit of an additional 977 events caused by single-transit planets in the full frame images (FFIs); this is a lower limit because the CTL-6 is incomplete below a TESS magnitude of > T 12 . Of the single-transit events from the PSs and FFIs, 1091/1218 will have transit depths deeper than 0.1% and will thus be amenable for photometric follow-up from the ground, and 1195/1218 will have radial velocity signals greater than 1m s −1 . We estimate that the periods of 146 single transits will be constrained to better than 10% using the TESS photometry assuming circular orbits. We find that the number of planets detected by TESS in the PSs with periods > P 25 days can be doubled by including single-transiting planets, while the number of planets with > P 250 days can be increased by an order of magnitude. We predict 79 habitable zone planets in the TESS light curves from single transits, with 18 orbiting FGK stars.
关键词：catalogs;planetary systems;surveys