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Occurrence Rate of Hot Jupiters Around Early-type M Dwarfs Based on Transiting Exoplanet Survey Satellite Dataстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Gan Tianjun, Wang Sharon X., Wang Songhu, Mao Shude, Huang Chelsea X., Collins Karen A., Stassun Keivan G., Shporer Avi, Zhu Wei, Ricker George R., Vanderspek Roland, Latham David W., Seager Sara, Winn Joshua N., Jenkins Jon M., Barkaoui Khalid, Belinski Alexander A., Ciardi David R., Evans Phil, Girardin Eric, Maslennikova Nataliia A., Mazeh Tsevi, Panahi Aviad, Pozuelos Francisco J., Radford Don J., Schwarz Richard P., Twicken Joseph D., Wünsche Anaël, Zucker Shay
- Журнал: Astronomical Journal
- Том: 165
- Номер: 1
- Год издания: 2023
- Издательство: American Astronomical Society
- Местоположение издательства: United States
- Первая страница: 17
- DOI: 10.3847/1538-3881/ac9b12
- Аннотация: We present an estimate of the occurrence rate of hot Jupiters (7 R ⊕ ≤ R p ≤ 2 R J, 0.8 ≤ P b ≤ 10 days) around early-type M dwarfs based on stars observed by the Transiting Exoplanet Survey Satellite (TESS) during its primary mission. We adopt stellar parameters from the TESS Input Catalog and construct a sample of 60,819 M dwarfs with 10.5 ≤ T mag ≤ 13.5, effective temperatures 2900 ≤ T eff ≤ 4000 K, and stellar masses 0.45 ≤ M * ≤ 0.65 M ⊙. We conduct a uninformed transit search using a detection pipeline based on the box least square search and characterize the searching completeness through an injection and recovery experiment. We combine a series of vetting steps including light centroid measurement, odd/even and secondary eclipse analysis, rotation and transit period synchronization tests as well as inspecting the ground-based photometric, spectroscopic, and imaging observations. Finally, we find a total of nine planet candidates, all of which are known TESS objects of interest. We obtain an occurrence rate of 0.27% ± 0.09% for hot Jupiters around early-type M dwarfs that satisfy our selection criteria. Compared with previous studies, the occurrence rate of hot Jupiters around early-type M dwarfs is smaller than all measurements for FGK stars, although they are consistent within 1σ-2σ. There is a trend that the occurrence rate of hot Jupiters has a peak at G dwarfs and falls toward both hotter and cooler stars. Combining results from transit, radial velocity, and microlensing surveys, we find that hot Jupiters around early-type M dwarfs possibly show a steeper decrease in the occurrence rate per logarithmic semimajor axis bin (dN/dlog10a) when compared with FGK stars.
- Добавил в систему: Белинский Александр Александрович