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  • Hirano, T.The Graduate University for Advanced Studies (SOKENDAI),National Institutes of Natural Sciences (NINS),National Astronomical Observatory of Japan (author)

An Earth-sized Planet around an M5 Dwarf Star at 22 pc

  • Article/chapterEnglish2023

Publisher, publication year, extent ...

  • 2023-02-27
  • American Astronomical Society,2023
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:3c5092ed-6138-40b3-8d96-17a26e045dd5
  • https://research.chalmers.se/publication/534940URI
  • https://doi.org/10.3847/1538-3881/acb7e1DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • We report on the discovery of an Earth-sized transiting planet (R p = 1.015 ± 0.051 R ⊕) in a P = 4.02 day orbit around K2-415 (EPIC 211414619), an M5V star at 22 pc. The planet candidate was first identified by analyzing the light-curve data obtained by the K2 mission, and it is here shown to exist in the most recent data from TESS. Combining the light curves with the data secured by our follow-up observations, including high-resolution imaging and near-infrared spectroscopy with IRD, we rule out false-positive scenarios, finding a low false-positive probability of 2 × 10−4. Based on IRD’s radial velocities of K2-415, which were sparsely taken over three years, we obtain a planet mass of 3.0 ± 2.7 M ⊕ (M p < 7.5 M ⊕ at 95% confidence) for K2-415b. Being one of the lowest-mass stars (≈0.16 M ⊙) known to host an Earth-sized transiting planet, K2-415 will be an interesting target for further follow-up observations, including additional radial velocity monitoring and transit spectroscopy.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Dai, FeiCalifornia Institute of Technology (Caltech) (author)
  • Livingston, J.National Institutes of Natural Sciences (NINS),The Graduate University for Advanced Studies (SOKENDAI),National Astronomical Observatory of Japan (author)
  • Grziwa, S.Universität zu Köln,University of Cologne (author)
  • Lam, K. W.F.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Kasagi, YuiNational Astronomical Observatory of Japan,The Graduate University for Advanced Studies (SOKENDAI) (author)
  • Narita, N.University of Tokyo, Japan,Instituto de Astrofísica de Canarias,National Institutes of Natural Sciences (NINS) (author)
  • Ishikawa, Hiroyuki TakoNational Astronomical Observatory of Japan,National Institutes of Natural Sciences (NINS) (author)
  • Miyakawa, KoheiNational Astronomical Observatory of Japan (author)
  • Serrano, L. M.Universita degli Studi di Torino,University of Turin (author)
  • Matsumoto, YujiNational Astronomical Observatory of Japan (author)
  • Kokubo, EiichiroNational Astronomical Observatory of Japan (author)
  • Kimura, TadahiroUniversity of Tokyo, Japan (author)
  • Ikoma, MasahiroUniversity of Tokyo, Japan,National Astronomical Observatory of Japan (author)
  • Winn, J. N.Princeton University (author)
  • Wisniewski, John P.George Mason University (author)
  • Harakawa, HirokiNational Astronomical Observatory of Japan (author)
  • Teng, Huan YuTokyo Institute of Technology (author)
  • Cochran, W. D.The University of Texas at Austin, USA (author)
  • Fukui, A.University of Tokyo, Japan,Instituto de Astrofísica de Canarias (author)
  • Gandolfi, D.Universita degli Studi di Torino,University of Turin (author)
  • Guenther, Eike W.Thüringer Landessternwarte Tautenburg (author)
  • Hori, YasunoriThe Graduate University for Advanced Studies (SOKENDAI),National Astronomical Observatory of Japan,National Institutes of Natural Sciences (NINS) (author)
  • Ikuta, KaiUniversity of Tokyo, Japan (author)
  • Kawauchi, KiyoeUniversity of Tokyo, Japan (author)
  • Knudstrup, E.Århus Universitet,Aarhus University (author)
  • Korth, Judith,1987Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)korth (author)
  • Kotani, TakayukiNational Astronomical Observatory of Japan,National Institutes of Natural Sciences (NINS),The Graduate University for Advanced Studies (SOKENDAI) (author)
  • Krishnamurthy, VigneshwaranNational Astronomical Observatory of Japan,National Institutes of Natural Sciences (NINS) (author)
  • Kudo, TomoyukiNational Astronomical Observatory of Japan (author)
  • Kurokawa, TakashiTokyo University of Agriculture and Technology,National Institutes of Natural Sciences (NINS) (author)
  • Kuzuhara, M.National Institutes of Natural Sciences (NINS),National Astronomical Observatory of Japan (author)
  • Luque, R.University of Chicago (author)
  • Mori, MayukoUniversity of Tokyo, Japan (author)
  • Nishikawa, JunNational Institutes of Natural Sciences (NINS),National Astronomical Observatory of Japan,The Graduate University for Advanced Studies (SOKENDAI) (author)
  • Omiya, MasashiNational Astronomical Observatory of Japan,National Institutes of Natural Sciences (NINS) (author)
  • Orell-Miquel, J.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
  • Palle, E.Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
  • Persson, C. M. (author)
  • Redfield, S.Wesleyan University (author)
  • Serabyn, E. (author)
  • Smith, Alexis M.S. (author)
  • Takahashi, AoiNational Institutes of Natural Sciences (NINS),National Astronomical Observatory of Japan (author)
  • Takarada, TakuyaNational Institutes of Natural Sciences (NINS),National Astronomical Observatory of Japan (author)
  • Ueda, AkitoshiNational Astronomical Observatory of Japan (author)
  • Van Eylen, Vincent (author)
  • Vievard, SébastienNational Astronomical Observatory of Japan,National Institutes of Natural Sciences (NINS) (author)
  • Tamura, MotohideUniversity of Tokyo, Japan,National Astronomical Observatory of Japan,National Institutes of Natural Sciences (NINS) (author)
  • Sato, Bun’eiTokyo Institute of Technology (author)
  • The Graduate University for Advanced Studies (SOKENDAI)National Institutes of Natural Sciences (NINS) (creator_code:org_t)

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  • In:Astronomical Journal: American Astronomical Society165:31538-38810004-6256

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