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Validation and atmo...
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Kawauchi, K.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
(author)
Validation and atmospheric exploration of the sub-Neptune TOI-2136b around a nearby M3 dwarf
- Article/chapterEnglish2022
Publisher, publication year, extent ...
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2022-09-27
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EDP Sciences,2022
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electronicrdacarrier
Numbers
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LIBRIS-ID:oai:research.chalmers.se:885a9d8e-8d43-4ece-873c-5ac598d50a7c
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https://doi.org/10.1051/0004-6361/202243381DOI
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https://research.chalmers.se/publication/532484URI
Supplementary language notes
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Language:English
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Summary in:English
Part of subdatabase
Classification
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Subject category:art swepub-publicationtype
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Subject category:ref swepub-contenttype
Notes
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Context. The NASA space telescope TESS is currently in the extended mission of its all-sky search for new transiting planets. Of the thousands of candidates that TESS is expected to deliver, transiting planets orbiting nearby M dwarfs are particularly interesting targets since they provide a great opportunity to characterize their atmospheres by transmission spectroscopy. Aims. We aim to validate and characterize the new sub-Neptune-sized planet candidate TOI-2136.01 orbiting a nearby M dwarf (d = 33.36 +/- 0.02 pc, T-eff = 3373 +/- 108 K) with an orbital period of 7.852 days. Methods. We use TESS data, ground-based multicolor photometry, and radial velocity measurements with the InfraRed Doppler (IRD) instrument on the Subaru Telescope to validate the planetary nature of TOI-2136.01, and estimate the stellar and planetary parameters. We also conduct high-resolution transmission spectroscopy to search for helium in its atmosphere. Results. We confirm that TOI-2136.01 (now named TOI-2136b) is a bona fide planet with a planetary radius of R-p = 2.20 +/- 0.07 R-circle plus and a mass of M-p = 4.7(-2.6)(+3.1) M-circle plus. We also search for helium 10830 angstrom absorption lines and place an upper limit on the equivalent width of <7.8 m angstrom and on the absorption signal of <1.44% with 95% confidence. Conclusions. TOI-2136b is a sub-Neptune transiting a nearby and bright star (J = 10.8 mag), and is a potentially hycean planet, which is a new class of habitable planets with large oceans under a H-2-rich atmosphere, making it an excellent target for atmospheric studies to understand the formation, evolution, and habitability of the small planets.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
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Murgas, F.Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
(author)
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Palle, E.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
(author)
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Narita, N.University of Tokyo, Japan,Astrobiology Center, Japan,Instituto de Astrofísica de Canarias,Japan Science and Technology Agency (JST)
(author)
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Fukui, A.University of Tokyo, Japan,Instituto de Astrofísica de Canarias
(author)
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Hirano, T.National Astronomical Observatory of Japan,Astrobiology Center, Japan
(author)
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Parviainen, H.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
(author)
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Ishikawa, H. T.National Astronomical Observatory of Japan,Astrobiology Center, Japan
(author)
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Watanabe, N.University of Tokyo, Japan
(author)
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Esparaza-Borges, E.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
(author)
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Kuzuhara, M.Astrobiology Center, Japan,National Astronomical Observatory of Japan
(author)
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Orell-Miquel, J.Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
(author)
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Krishnamurthy, VAstrobiology Center, Japan,National Astronomical Observatory of Japan
(author)
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Mori, M.University of Tokyo, Japan
(author)
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Kagetani, T.University of Tokyo, Japan
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Zou, Y.University of Tokyo, Japan
(author)
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Isogai, K.University of Tokyo, Japan,Kyoto University
(author)
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Livingston, J. H.University of Tokyo, Japan,Astrobiology Center, Japan,National Astronomical Observatory of Japan
(author)
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Howell, S. B.NASA Ames Research Center
(author)
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Crouzet, N.European Space Agency (ESA)
(author)
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de Leon, J. P.University of Tokyo, Japan
(author)
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Kimura, T.University of Tokyo, Japan
(author)
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Kodama, T.University of Tokyo, Japan
(author)
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Korth, Judith,1987Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)korth
(author)
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Kurita, S.University of Tokyo, Japan
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Laza-Ramos, A.Instituto de Astrofísica de Canarias
(author)
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Luque, R.Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
(author)
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Madrigal-Aguado, A.Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
(author)
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Miyakawa, K.Tokyo Institute of Technology
(author)
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Morello, G.Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
(author)
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Nishiumi, T.University of Tokyo, Japan,The Graduate University for Advanced Studies (SOKENDAI),Astrobiology Center, Japan
(author)
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Rodriguez, G. E. F.Instituto de Astrofísica de Canarias
(author)
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Sanchez-Benavente, M.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
(author)
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Stangret, M.Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
(author)
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Teng, H.Tokyo Institute of Technology
(author)
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Terada, Y.Academia Sinica Taiwan,National Taiwan University
(author)
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Gnilka, C. L.NASA Ames Research Center,California Institute of Technology (Caltech)
(author)
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Guerrero, N.Massachusetts Institute of Technology (MIT),University of Florida
(author)
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Harakawa, H.National Astronomical Observatory of Japan
(author)
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Hodapp, K.University of Hawaii
(author)
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Hori, Y.National Astronomical Observatory of Japan,Astrobiology Center, Japan
(author)
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Ikoma, M.National Astronomical Observatory of Japan
(author)
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Jacobson, S.University of Hawaii
(author)
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Konishi, M.Oita University
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Kotani, T.Astrobiology Center, Japan,The Graduate University for Advanced Studies (SOKENDAI),National Astronomical Observatory of Japan
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Kudo, T.National Astronomical Observatory of Japan
(author)
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Kurokowa, T.Tokyo University of Agriculture and Technology,Astrobiology Center, Japan
(author)
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Kusakabe, N.Astrobiology Center, Japan,National Astronomical Observatory of Japan
(author)
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Nishikawa, J.Astrobiology Center, Japan,National Astronomical Observatory of Japan,The Graduate University for Advanced Studies (SOKENDAI)
(author)
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Omiya, M.National Astronomical Observatory of Japan,Astrobiology Center, Japan
(author)
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Serizawa, T.Tokyo University of Agriculture and Technology,National Astronomical Observatory of Japan
(author)
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Tamura, M.University of Tokyo, Japan,National Astronomical Observatory of Japan,Astrobiology Center, Japan
(author)
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Ueda, A.The Graduate University for Advanced Studies (SOKENDAI),National Astronomical Observatory of Japan,Astrobiology Center, Japan
(author)
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Vievard, S.Astrobiology Center, Japan,National Astronomical Observatory of Japan
(author)
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Instituto de Astrofísica de CanariasUniversidad de la Laguna
(creator_code:org_t)
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In:Astronomy and Astrophysics: EDP Sciences6660004-63611432-0746
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- By the author/editor
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Kawauchi, K.
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Murgas, F.
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Palle, E.
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Narita, N.
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Fukui, A.
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Hirano, T.
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show more...
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Parviainen, H.
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Ishikawa, H. T.
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Watanabe, N.
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Esparaza-Borges, ...
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Kuzuhara, M.
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Orell-Miquel, J.
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Krishnamurthy, V
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Mori, M.
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Kagetani, T.
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Zou, Y.
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Isogai, K.
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Livingston, J. H ...
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Howell, S. B.
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Crouzet, N.
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de Leon, J. P.
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Kimura, T.
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Kodama, T.
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Korth, Judith, 1 ...
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Kurita, S.
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Laza-Ramos, A.
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Luque, R.
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Madrigal-Aguado, ...
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Miyakawa, K.
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Morello, G.
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Nishiumi, T.
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Rodriguez, G. E. ...
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Sanchez-Benavent ...
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Stangret, M.
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Teng, H.
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Terada, Y.
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Gnilka, C. L.
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Guerrero, N.
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Harakawa, H.
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Hodapp, K.
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Hori, Y.
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Ikoma, M.
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Jacobson, S.
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Konishi, M.
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Kotani, T.
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Kudo, T.
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Kurokowa, T.
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Kusakabe, N.
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Nishikawa, J.
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Omiya, M.
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Serizawa, T.
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Tamura, M.
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Ueda, A.
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Vievard, S.
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