1. π Earth: A 3.14 day Earth-sized Planet from K2's Kitchen Served Warm by the SPECULOOS Team
- Author
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Howard Issacson, Julien de Wit, Roi Alonso, Francisco J. Pozuelos, Sairam Lalitha, Andrew W. Howard, Valérie Van Grootel, Michaël Gillon, Lionel Garcia, Daniel Sebastian, Ian Crossfield, Emmanuel Jehin, Maximilian N. Günther, Didier Queloz, Samantha Thompson, Prajwal Niraula, Corey Beard, Amaury H. M. J. Triaud, Yilen Gómez Maqueo Chew, Laetitia Delrez, A. Burdanov, Benjamin V. Rackham, P. P. Pedersen, Rafael Rebolo-López, Benjamin J. Fulton, Brice-Olivier Demory, C. Murray, Elsa Ducrot, Niraula, P [0000-0002-8052-3893], Wit, JD [0000-0003-2415-2191], Rackham, BV [0000-0002-3627-1676], Ducrot, E [0000-0002-7008-6888], Burdanov, A [0000-0001-9892-2406], Grootel, VV [0000-0003-2144-4316], Alonso, R [0000-0001-8462-8126], Beard, C [0000-0001-7708-2364], Demory, BO [0000-0002-9355-5165], Fulton, BJ [0000-0003-3504-5316], Gillon, M [0000-0003-1462-7739], Günther, MN [0000-0002-3164-9086], Howard, AW [0000-0001-8638-0320], Issacson, H [0000-0002-0531-1073], Jehin, E [0000-0001-8923-488X], Pedersen, PP [0000-0002-5220-609X], Pozuelos, FJ [0000-0003-1572-7707], Queloz, D [0000-0002-3012-0316], Rebolo-López, R [0000-0003-3767-7085], Lalitha, S [0000-0001-8102-3033], Sebastian, D [0000-0002-2214-9258], Thompson, S [0000-0002-8039-194X], Triaud, AHMJ [0000-0002-5510-8751], and Apollo - University of Cambridge Repository
- Subjects
Dwarf star ,010504 meteorology & atmospheric sciences ,530 Physics ,Exoplanetology ,Astrophysics::Cosmology and Extragalactic Astrophysics ,EPIC ,01 natural sciences ,Planet ,0103 physical sciences ,Exoplanet detection methods ,Astrophysics::Solar and Stellar Astrophysics ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics ,0105 earth and related environmental sciences ,Physics ,520 Astronomy ,James Webb Space Telescope ,Astrophysics::Instrumentation and Methods for Astrophysics ,Astronomy ,Astronomy and Astrophysics ,500 Science ,Exoplanet ,Space and Planetary Science ,Astrophysics::Earth and Planetary Astrophysics ,Transit photometry ,Astrophysics - Earth and Planetary Astrophysics - Abstract
We report on the discovery of a transiting Earth-sized (0.95R ⊕) planet around an M3.5 dwarf star at 57 pc, EPIC 249631677. The planet has a period of ∼3.14 days, i.e., ∼π, with an installation of 7.45 S⊕. The detection was made using publicly available data from K2's Campaign 15. We observed three additional transits with SPECULOOS Southern and Northern Observatories, and a stellar spectrum from Keck/HIRES, which allowed us to validate the planetary nature of the signal. The confirmed planet is well suited for comparative terrestrial exoplanetology. While exoplanets transiting ultracool dwarfs present the best opportunity for atmospheric studies of terrestrial exoplanets with the James Webb Space Telescope, those orbiting mid-M dwarfs within 100 pc such as EPIC 249631677b will become increasingly accessible with the next generation of observatories.
- Published
- 2020