TOI-2285b: A 1.7 Earth-radius planet near the habitable zone around a nearby M dwarf

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Fukui, AkihikoUniversity of Tokyo, Japan,Instituto de Astrofísica de Canarias (author)

TOI-2285b: A 1.7 Earth-radius planet near the habitable zone around a nearby M dwarf

Article/chapterEnglish2022

Publisher, publication year, extent ...

2021-12-05
Oxford University Press (OUP),2022
electronicrdacarrier

Numbers

LIBRIS-ID:oai:research.chalmers.se:4907deb5-c69c-476b-936c-6d8a49a1e32e
https://doi.org/10.1093/pasj/psab106DOI
https://research.chalmers.se/publication/528915URI

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Language:English
Summary in:English

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

Notes

We report the discovery of TO1-2285b, a sub-Neptune-sized planet transiting a nearby (42 pc) M dwarf with a period of 27.3 d. We identified the transit signal from the Transiting Exoplanet Survey Satellite photometric data, which we confirmed with ground-based photometric observations using the multiband imagers MuSCAT2 and MuSCAT3. Combining these data with other follow-up observations including high-resolution spectroscopy with the Tillinghast Reflector Echelle Spectrograph, high-resolution imaging with the SPeckle Polarimeter, and radial velocity (RV) measurements with the InfraRed Doppler instrument, we find that the planet has a radius of 1.74 +/- 0.08 R-circle plus, a mass of <19.5 M-circle plus + (95% c.I.), and an insolation flux of 1.54 +/- 0.14 times that of the Earth. Although the planet resides just outside the habitable zone for a rocky planet, if the planet harbors an H2O layer under a hydrogen-rich atmosphere, then liquid water could exist on the surface of the H2O layer depending on the planetary mass and water mass fraction. The bright host star in the near-infrared (K-s = 9.0) makes this planet an excellent target for further RV and atmospheric observations to improve our understanding of the composition, formation, and habitability of sub-Neptune-sized planets.

Subject headings and genre

NATURVETENSKAP Geovetenskap och miljövetenskap Meteorologi och atmosfärforskning hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Meteorology and Atmospheric Sciences hsv//eng
NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
NATURVETENSKAP Geovetenskap och miljövetenskap Geofysik hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Geophysics hsv//eng
planets and satellites:detection
planets and satellites: interiors
planets and satellites: individual (TOI-2285b)
techniques: radial velocities
techniques: photometric

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

Kimura, TadahiroUniversity of Tokyo, Japan (author)
Hirano, TeruyukiAstrobiology Center, Japan (author)
Narita, NorioUniversity of Tokyo, Japan,Astrobiology Center, Japan,Japan Science and Technology Agency (JST),Instituto de Astrofísica de Canarias (author)
Kodama, TakanoriUniversity of Tokyo, Japan (author)
Hori, YasunoriNational Astronomical Observatory of Japan,Astrobiology Center, Japan (author)
Ikoma, MasahiroNational Astronomical Observatory of Japan (author)
Palle, EnricUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
Murgas, FelipeInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
Parviainen, HannuInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
Kawauchi, KiyoeInstituto de Astrofísica de Canarias (author)
Mori, MayukoUniversity of Tokyo, Japan (author)
Esparza-Borges, EmmaInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
Bieryla, AllysonHarvard-Smithsonian Center for Astrophysics (author)
Irwin, JonathanHarvard-Smithsonian Center for Astrophysics (author)
Safonov, Boris S.M. V. Lomonosov Moscow State University (author)
Stassun, Keivan G.Fisk University,Vanderbilt University (author)
Alvarez-Hernandez, LeticiaUniversidad de la Laguna,University of La Laguna (author)
Bejar, Victor J. S.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
Casasayas-Barris, NuriaUniversiteit Leiden (UL),Leiden University (UL) (author)
Chen, GuoChinese Academy of Sciences (author)
Crouzet, NicolasEuropean Space Research and Technology Centre (ESA ESTEC) (author)
de Leon, Jerome P.University of Tokyo, Japan (author)
Isogai, KeisukeUniversity of Tokyo, Japan,Kyoto University (author)
Kagetani, TaikiUniversity of Tokyo, Japan (author)
Klagyivik, PeterDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
Korth, Judith,1987Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)korth (author)
Kurita, SeiyaUniversity of Tokyo, Japan (author)
Kusakabe, NobuhikoAstrobiology Center, Japan (author)
Livingston, JohnUniversity of Tokyo, Japan (author)
Luque, RafaelInstituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA) (author)
Madrigal-Aguado, AlbertoInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
Morello, GiuseppeInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
Nishiumi, TakuThe Graduate University for Advanced Studies (SOKENDAI),Astrobiology Center, Japan (author)
Orell-Miquel, JaumeInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
Oshagh, MahmoudrezaInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
Sanchez-Benavente, ManuelUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
Stangret, MonikaUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
Terada, YukaAcademia Sinica Taiwan,National Taiwan University (author)
Watanabe, NoriharuUniversity of Tokyo, Japan (author)
Zou, YujieUniversity of Tokyo, Japan (author)
Tamura, MotohideUniversity of Tokyo, Japan,National Astronomical Observatory of Japan,Astrobiology Center, Japan (author)
Kurokawa, TakashiTokyo University of Agriculture and Technology,Astrobiology Center, Japan (author)
Kuzuhara, MasayukiNational Astronomical Observatory of Japan,Astrobiology Center, Japan (author)
Nishikawa, JunAstrobiology Center, Japan,The Graduate University for Advanced Studies (SOKENDAI),National Astronomical Observatory of Japan (author)
Omiya, MasashiAstrobiology Center, Japan,National Astronomical Observatory of Japan (author)
Vievard, SebastienNational Astronomical Observatory of Japan (author)
Ueda, AkitoshiThe Graduate University for Advanced Studies (SOKENDAI),Astrobiology Center, Japan,National Astronomical Observatory of Japan (author)
Latham, David W.Harvard-Smithsonian Center for Astrophysics (author)
Quinn, Samuel N.Harvard-Smithsonian Center for Astrophysics (author)
Strakhov, Ivan S.M. V. Lomonosov Moscow State University (author)
Belinski, Alexandr A.M. V. Lomonosov Moscow State University (author)
Jenkins, Jon M.NASA Ames Research Center (author)
Ricker, George R.Massachusetts Institute of Technology (MIT) (author)
Seager, SaraMassachusetts Institute of Technology (MIT) (author)
Vanderspek, RolandMassachusetts Institute of Technology (MIT) (author)
Winn, Joshua N.Princeton University (author)
Charbonneau, DavidHarvard-Smithsonian Center for Astrophysics (author)
Ciardi, David R.California Institute of Technology (Caltech) (author)
Collins, Karen A.Harvard-Smithsonian Center for Astrophysics (author)
Doty, John P. (author)
Bachelet, EtienneLas Cumbres Observatory Global Telescope Network, Inc (author)
Harbeck, DanielLas Cumbres Observatory Global Telescope Network, Inc (author)
University of Tokyo, JapanInstituto de Astrofísica de Canarias (creator_code:org_t)

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In:Publication of the Astronomical Society of Japan: Oxford University Press (OUP)74:1, s. L1-L82053-051X0004-6264

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By the author/editor: Fukui, Akihiko; Kimura, Tadahiro; Hirano, Teruyuki; Narita, Norio; Kodama, Takanori; Hori, Yasunori; show more...; Ikoma, Masahiro; Palle, Enric; Murgas, Felipe; Parviainen, Hann ...; Kawauchi, Kiyoe; Mori, Mayuko; Esparza-Borges, ...; Bieryla, Allyson; Irwin, Jonathan; Safonov, Boris S ...; Stassun, Keivan ...; Alvarez-Hernande ...; Bejar, Victor J. ...; Casasayas-Barris ...; Chen, Guo; Crouzet, Nicolas; de Leon, Jerome ...; Isogai, Keisuke; Kagetani, Taiki; Klagyivik, Peter; Korth, Judith, 1 ...; Kurita, Seiya; Kusakabe, Nobuhi ...; Livingston, John; Luque, Rafael; Madrigal-Aguado, ...; Morello, Giusepp ...; Nishiumi, Taku; Orell-Miquel, Ja ...; Oshagh, Mahmoudr ...; Sanchez-Benavent ...; Stangret, Monika; Terada, Yuka; Watanabe, Noriha ...; Zou, Yujie; Tamura, Motohide; Kurokawa, Takash ...; Kuzuhara, Masayu ...; Nishikawa, Jun; Omiya, Masashi; Vievard, Sebasti ...; Ueda, Akitoshi; Latham, David W.; Quinn, Samuel N.; Strakhov, Ivan S ...; Belinski, Alexan ...; Jenkins, Jon M.; Ricker, George R ...; Seager, Sara; Vanderspek, Rola ...; Winn, Joshua N.; Charbonneau, Dav ...; Ciardi, David R.; Collins, Karen A ...; Doty, John P.; Bachelet, Etienn ...; Harbeck, Daniel; show less...

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NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Meteorology and ...

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Astronomy Astrop ...

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Geophysics

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