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

Fukui, Akihiko and Kimura, Tadahiro and Hirano, Teruyuki and Narita, Norio and Kodama, Takanori and Hori, Yasunori and Ikoma, Masahiro and Palle, Enric and Murgas, Felipe and Parviainen, Hannu and Kawauchi, Kiyoe and Mori, Mayuko and Esparza-Borges, Emma and Bieryla, Allyson and Irwin, Jonathan and Safonov, Boris S. and Stassun, Keivan G. and Alvarez-Hernandez, Leticia and Béjar, Victor J. S. and Casasayas-Barris, Núria and Chen, Guo and Crouzet, Nicolas and de Leon, Jerome P. and Isogai, Keisuke and Kagetani, Taiki and Klagyivik, Peter and Korth, Judith and Kurita, Seiya and Kusakabe, Nobuhiko and Livingston, John H. and Luque, Rafael and Madrigal-Aguado, Alberto and Morello, Giuseppe and Nishiumi, Taku and Orell-Miquel, Jaume and Oshagh, Mahmoudreza and Sánchez-Benavente, Manuel and Stangret, Monika and Terada, Yuka and Watanabe, Noriharu and Zou, Yujie and Tamura, Motohide and Kurokawa, Takashi and Kuzuhara, Masayuki and Nishikawa, Jun and Omiya, Masashi and Vievard, Sébastien and Ueda, Akitoshi and Latham, David W. and Quinn, Samuel N. and Strakhov, Ivan S. and Belinski, Alexandr A. and Jenkins, Jon M. and Ricker, George R. and Seager, Sara and Vanderspek, Roland and Winn, Joshua N. and Charbonneau, David and Ciardi, David R. and Collins, Karen A. and Doty, John P. and Bachelet, Etienne and Harbeck, Daniel (2022) TOI-2285b: A 1.7 Earth-radius planet near the habitable zone around a nearby M dwarf. Publications of the Astronomical Society of Japan, 74 (1), L1-L8. Oxford University Press. doi: 10.1093/pasj/psab106. ISSN 0004-6264.

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Official URL: https://academic.oup.com/pasj/article/74/1/L1/6449104

Abstract

We report the discovery of TOI-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±0.08R⊕, a mass of <19.5M⊕ (95% c.l.), 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 (Ks = 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.

Item URL in elib:https://elib.dlr.de/189193/
Document Type:Article
Title:TOI-2285b: A 1.7 Earth-radius planet near the habitable zone around a nearby M dwarf
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Fukui, AkihikoKomaba Institute for Science, The University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo 153-8902, Japan; Instituto de Astrofísica de Canarias (IAC), E-38205 La Laguna, Tenerife, Spainhttps://orcid.org/0000-0002-4909-5763
Kimura, TadahiroThe University of Tokyo, JapanUNSPECIFIED
Hirano, TeruyukiAstrobiology Center, 2-21-1 Osawa, Mitaka, TokyoUNSPECIFIED
Narita, NorioKomaba Institute for Science, The University of Tokyo, Tokyo, Japan; PRESTO, JST, Tokyo, Japan; Astrobiology Center, Tokyo, Japan; National Astronomical Observatory of Japan, Tokyo, Japan; Instituto de Astrofísica de Canarias (IAC), Tenerife, SpainUNSPECIFIED
Kodama, TakanoriKomaba Institute for Science, The University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo 153-8902, Japanhttps://orcid.org/0000-0001-9032-5826
Hori, YasunoriAstrobiology Center, 2-21-1 Osawa, Mitaka, TokyoUNSPECIFIED
Ikoma, MasahiroNational Astronomical Observatory of JapanUNSPECIFIED
Palle, EnricInstituto de Astrofísica de Canarias, C. Vía Láctea, s/n, E-38205, Spainhttps://orcid.org/0000-0003-0987-1593
Murgas, FelipeInstituto de Astrof ́ısica de Canarias (IAC), E-38205 La Laguna, Tenerife,Spainhttps://orcid.org/0000-0001-9087-1245
Parviainen, HannuInstituto de Astrofísica de Canarias (IAC), E-38200 La Laguna, Tenerife, Spain; Dept. Astrofísica, Universidad de La Laguna (ULL), E-38206 La Laguna, Tenerife, Spainhttps://orcid.org/0000-0001-5519-1391
Kawauchi, KiyoeInstituto de Astrofísica de Canarias, C. Vía Láctea, s/n, E-38205, SpainUNSPECIFIED
Mori, MayukoThe University of Tokyo, JapanUNSPECIFIED
Esparza-Borges, EmmaInstituto de Astrofísica de Canarias (IAC), E-38200 La Laguna, Tenerife, Spain; Dept. Astrofísica, Universidad de La Laguna (ULL), E-38206 La Laguna, Tenerife, Spainhttps://orcid.org/0000-0002-2341-3233
Bieryla, AllysonCenter for Astrophysics, Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USAhttps://orcid.org/0000-0001-6637-5401
Irwin, JonathanCenter for Astrophysics, Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USAUNSPECIFIED
Safonov, Boris S.Sternberg Astronomical Institute, M.V. Lomonosov Moscow UniversityUNSPECIFIED
Stassun, Keivan G.Vanderbilt University, Department of Physics &#38; Astronomy, 6301 Stevenson Center Lane, Nashville, TN 37235, US ; Fisk University, Department of Physics, 1000 17th Avenue North, Nashville, TN 37208, US 0000-0002-3481-9052UNSPECIFIED
Alvarez-Hernandez, LeticiaDepartamento de Astrofisica, Universidad de La Laguna, Tenerife, SpainUNSPECIFIED
Béjar, Victor J. S.Instituto de Astrofísica de Canarias, C. Vía Láctea, s/n, E-38205, SpainUNSPECIFIED
Casasayas-Barris, NúriaLeiden Observatory, Leiden UniversityUNSPECIFIED
Chen, GuoCAS Key Laboratory of Planetary Sciences, Chinese Academy of SciencesUNSPECIFIED
Crouzet, NicolasEuropean Space Agency (ESA), European Space Research and Technology Centre (ESTEC), Keplerlaan 1, NL-2201 AZ Noordwijk, the NetherlandsUNSPECIFIED
de Leon, Jerome P.The University of Tokyo, JapanUNSPECIFIED
Isogai, KeisukeOkayama Observatory, Kyoto University, JapanUNSPECIFIED
Kagetani, TaikiThe University of Tokyo, JapanUNSPECIFIED
Klagyivik, PeterPeter.Klagyivik (at) dlr.dehttps://orcid.org/0000-0003-0700-6176
Korth, JudithDepartment of Space, Earth and Environment, Astronomy and Plasma Physics, Chalmers University of Technology, SE-41296 Gothenburg, SwedenUNSPECIFIED
Kurita, SeiyaThe University of TokyoUNSPECIFIED
Kusakabe, NobuhikoAstrobiology Center, 2-21-1 Osawa, Mitaka, TokyoUNSPECIFIED
Livingston, John H.Department of Astronomy, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan 0000-0002-4881-3620https://orcid.org/0000-0002-4881-3620
Luque, RafaelInstituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía s/n, E-18008 Granada, Spainhttps://orcid.org/0000-0002-4671-2957
Madrigal-Aguado, AlbertoInstituto de Astrofísica de Canarias, C. Vía Láctea, s/n, E-38205, SpainUNSPECIFIED
Morello, GiuseppeInstituto de Astrofísica de Canarias, C. Vía Láctea, s/n, E-38205, SpainUNSPECIFIED
Nishiumi, TakuDepartment of Astronomical Science, The Graduated University for Advanced Studies, Tokyo, JapanUNSPECIFIED
Orell-Miquel, JaumeInstituto de Astrofísica de Canarias, C. Vía Láctea, s/n, E-38205, SpainUNSPECIFIED
Oshagh, MahmoudrezaInstituto de Astrofísica de Canarias, C. Vía Láctea, s/n, E-38205, SpainUNSPECIFIED
Sánchez-Benavente, ManuelInstituto de Astrofísica de Canarias, C. Vía Láctea, s/n, E-38205, SpainUNSPECIFIED
Stangret, MonikaInstituto de Astrofísica de Canarias, C. Vía Láctea, s/n, E-38205, SpainUNSPECIFIED
Terada, YukaInstitute of Astronomy and Astrophysics, Academia Sinica, TaiwanUNSPECIFIED
Watanabe, NoriharuDepartment of Multi-Disciplinary Sciences, The University of Tokyo, JapanUNSPECIFIED
Zou, YujieDepartment of Multi-Disciplinary Sciences, The University of Tokyo, JapanUNSPECIFIED
Tamura, MotohideDepartment of Astronomy, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan; Astrobiology Center, NINS, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan ; National Astronomical Observatory of Japan, NINS, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, JUNSPECIFIED
Kurokawa, TakashiAstrobiology Center, 2-21-1 Osawa, Mitaka, TokyoUNSPECIFIED
Kuzuhara, MasayukiAstrobiology Center, 2-21-1 Osawa, Mitaka, TokyoUNSPECIFIED
Nishikawa, JunNational Astronomical Observatory of Japan, Tokyo, JapanUNSPECIFIED
Omiya, MasashiAstrobiology Center, 2-21-1 Osawa, Mitaka, TokyoUNSPECIFIED
Vievard, SébastienSubaru Telescope, Hilo, USAUNSPECIFIED
Ueda, AkitoshiAstrobiology Center, 2-21-1 Osawa, Mitaka, TokyoUNSPECIFIED
Latham, David W.Center for Astrophysics, Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USAhttps://orcid.org/0000-0001-9911-7388
Quinn, Samuel N.Center for Astrophysics | Harvard and Smithsonian, Cambridge, MA, USAhttps://orcid.org/0000-0002-8964-8377
Strakhov, Ivan S.Sternberg Astronomical Institute, M.V. Lomonosov Moscow UniversityUNSPECIFIED
Belinski, Alexandr A.Sternberg Astronomical Institute, M.V. Lomonosov Moscow UniversityUNSPECIFIED
Jenkins, Jon M.NASA Ames Research Center, Moffett Field, CA 94035, USAhttps://orcid.org/0000-0002-4715-9460
Ricker, George R.Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USAUNSPECIFIED
Seager, SaraDepartment of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USA; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA; DUNSPECIFIED
Vanderspek, RolandDepartment of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USAUNSPECIFIED
Winn, Joshua N.Department of Astrophysics Sciences, Princeton University, 4 Ivy Lane, Priceton, NJ 08544, USAUNSPECIFIED
Charbonneau, DavidCenter for Astrophysics, Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USAUNSPECIFIED
Ciardi, David R.Caltech/IPAC-NASA Exoplanet Science Institute, Pasadena, CA, USAUNSPECIFIED
Collins, Karen A.Center for Astrophysics, Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USAhttps://orcid.org/0000-0001-6588-9574
Doty, John P.Noqsi Aerospace Ltd., Billerica, USAUNSPECIFIED
Bachelet, EtienneLas Cumbres Observatory, Goleta, USAUNSPECIFIED
Harbeck, DanielLas Cumbres Observatory, Goleta, USAUNSPECIFIED
Date:2022
Journal or Publication Title:Publications of the Astronomical Society of Japan
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:74
DOI:10.1093/pasj/psab106
Page Range:L1-L8
Publisher:Oxford University Press
ISSN:0004-6264
Status:Published
Keywords:planets and satellites: detection, planets and satellites: individual (TOI-2285b), planets and satellites: interiors, techniques: photometric, techniques: radial velocities, Astrophysics - Earth and Planetary Astrophysics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - QS-Project_04 Big-Data-Plattform
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Deposited By: Klagyivik, Peter
Deposited On:07 Nov 2022 10:59
Last Modified:07 Nov 2022 10:59

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