Planet Hunters TESS III: two transiting planets around the bright G dwarf HD 152843
| العنوان: | Planet Hunters TESS III: two transiting planets around the bright G dwarf HD 152843 |
|---|---|
| المؤلفون: | Jonathan Horner, N. Zicher, M. Hof, Jon M. Jenkins, Belinda A. Nicholson, A. Sporer, Joshua N. Winn, Nora L. Eisner, Grant Miller, K. Peltsch, George R. Ricker, Annelies Mortier, C. Rubio-Alfaro, T. Hoffman, R. Ferstenou, Chris Lintott, D. M. Bundy, S. Alhassan, G. M. Wilson, Andrew Tkachenko, Oscar Barragán, A. Hubert, Lars A. Buchhave, S. Lee, D. Maetschke, Keivan G. Stassun, Suzanne Aigrain, Sara Seager, D. A. Caldwell, Vinesh M. Rajpaul, L. Kaye, Baptiste Klein, James E. Taylor, L. Lau, V. Efremov, Elisabeth Baeten, Joe Llama, D. W. Latham, B. L. Goodwin, S. J. Bean |
| المساهمون: | Apollo-University Of Cambridge Repository, Mortier, Annelies [0000-0001-7254-4363], Rajpaul, Vinesh [0000-0001-7576-6703], Apollo - University of Cambridge Repository |
| المصدر: | arXiv Eisner, N L, Nicholson, B A, Barragán, O, Aigrain, S, Lintott, C, Kaye, L, Klein, B, Miller, G, Taylor, J, Zicher, N, Buchhave, L A, Caldwell, D A, Horner, J, Llama, J, Mortier, A, Rajpaul, V M, Stassun, K, Sporer, A, Tkachenko, A, Jenkins, J M, Latham, D, Ricker, G, Seager, S, Winn, J, Alhassan, S, Baeten, E M L, Bean, S J, Bundy, D M, Efremov, V, Ferstenou, R, Goodwin, B L, Hof, M, Hoffman, T, Hubert, A, Lau, L, Lee, S, Maetschke, D, Peltsch, K, Rubio-Alfaro, C & Wilson, G M 2021, ' Planet Hunters TESS III: Two transiting planets around the bright G dwarf HD 152843 ', Monthly Notices of the Royal Astronomical Society, vol. 505, no. 2, pp. 1827–1840 . https://doi.org/10.1093/mnras/stab1253 |
| بيانات النشر: | Oxford University Press (OUP), 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | planets and satellites: detection, Star (game theory), statistical [methods], FOS: Physical sciences, SUPER-EARTH, Astrophysics, Astronomy & Astrophysics, EARTH-SIZED PLANET, MASS PLANETS, 01 natural sciences, fundamental parameters [Stars], individual: TIC 349488688, HD152843 [Stars], Planet, 0103 physical sciences, Methods, GALAXY ZOO, Transit (astronomy), 010303 astronomy & astrophysics, CANDIDATES, Earth and Planetary Astrophysics (astro-ph.EP), Physics, methods: statistical, Science & Technology, RADIAL-VELOCITY, 010308 nuclear & particles physics, Astronomy and Astrophysics, Radius, Statistical, Light curve, Orbital period, EXOPLANETS, Exoplanet, detection [Planets and satellites], Planetary science, 13. Climate action, Space and Planetary Science, DISCOVERY, stars: individual: TIC 349488688, HD152843, Physical Sciences, ROTATION, stars: fundamental parameters, SYSTEM, Astrophysics - Earth and Planetary Astrophysics |
| الوصف: | We report on the discovery and validation of a two-planet system around a bright (V = 8.85 mag) early G dwarf (1.43 $R_{\odot}$, 1.15 $M_{\odot}$, TOI 2319) using data from NASA's Transiting Exoplanet Survey Satellite (TESS). Three transit events from two planets were detected by citizen scientists in the month-long TESS light curve (sector 25), as part of the Planet Hunters TESS project. Modelling of the transits yields an orbital period of \Pb\ and radius of $3.41 _{ - 0.12 } ^ { + 0.14 }$ $R_{\oplus}$ for the inner planet, and a period in the range 19.26-35 days and a radius of $5.83 _{ - 0.14 } ^ { + 0.14 }$ $R_{\oplus}$ for the outer planet, which was only seen to transit once. Each signal was independently statistically validated, taking into consideration the TESS light curve as well as the ground-based spectroscopic follow-up observations. Radial velocities from HARPS-N and EXPRES yield a tentative detection of planet b, whose mass we estimate to be $11.56 _{ - 6.14 } ^ { + 6.58 }$ $M_{\oplus}$, and allow us to place an upper limit of $27.5$ $M_{\oplus}$ (99 per cent confidence) on the mass of planet c. Due to the brightness of the host star and the strong likelihood of an extended H/He atmosphere on both planets, this system offers excellent prospects for atmospheric characterisation and comparative planetology. Accepted for publication in MNRAS (15 pages, 10 figures, 3 tables) |
| وصف الملف: | application/pdf |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::43a83065248b6a3d4e69b2ab7a44960f https://hdl.handle.net/1721.1/135642 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....43a83065248b6a3d4e69b2ab7a44960f |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |