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Discovery of a hot, transiting, Earth-sized planet and a second temperate, non-transiting planet around the M4 dwarf GJ 3473 (TOI-488)

Kemmer, J. and Stock, S. and Kossakowski, D. and Kaminski, A. and Molaverdikhani, K. and Schlecker, M. and Caballero, J. A. and Amado, P. J. and Astudillo-Defru, N. and Bonfils, X. and Ciardi, David R. and Collins, K. A. and Espinoza, N. and Fukui, A. and Hirano, T. and Jenkins, J.M. and Latham, D.W. and Matthews, Elisabeth and Narita, Norio and Palle, E. and Parviainen, H. and Quirrenbach, A. and Reiners, A. and Ribas, I. and Ricker, G. and Schlieder, Joshua and Seager, Sara and Vanderspek, R. and Winn, J.N. and Almenara, J. M. and Bejar, V. and Bluhm, P. and Bouchy, F. and Boyd, P. and Christiansen, Jessie L. and Cifuentes, C. and Cloutier, R. and Collins, K.I. and Cortés-Contreras, M. and Crossfield, Ian J.M. and Crouzet, N. and de Leon, J.P. and Della-Rose, D.D. and Delfosse, X. and Dreizler, S. and Esparza-Borges, E. and Essack, Z. and Forveille, Th. and Figueira, P. and Galadí-Enríquez, D. and Gan, T. and Glidden, A. and Gonzales, Erica J. and Guerra, P. and Harakawa, H. and Hatzes, A.P. and Henning, Thomas and Herrero, E. and Hodapp, K. and Hori, Y. and Howell, S. and Ikoma, M. and Isogai, K. and Jeffers, S. V. and Kurster, M. and Kawauchi, K. and Kimura, T. and Klagyivik, Peter and Kotani, T. and Kurokawa, T. and Kusakabe, N. and Kuzuhara, M. and Lafarga, M. and Livingston, J.H. and Luque, R. and Matson, R. and Morales, J. C. and Mori, Mayuko and Muirhead, P.S. and Murgas, F. and Nishikawa, J. and Nishiumi, T. and Omiya, M. and Reffert, S. and Rodríguez López, C. and Santos, N.C. and Schöfer, P. and Schwarz, R.P. and Shiao, B. and Tamura, M. and Terada, Y. and Twicken, J.D. and Ueda, A. and Vievard, S. and Watanabe, N. and Zechmeister, M. (2020) Discovery of a hot, transiting, Earth-sized planet and a second temperate, non-transiting planet around the M4 dwarf GJ 3473 (TOI-488). Astronomy and Astrophysics, 642, A236. EDP Sciences. doi: 10.1051/0004-6361/202038967. ISSN 0004-6361.

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Official URL: https://www.aanda.org/articles/aa/abs/2020/10/aa38967-20/aa38967-20.html

Abstract

We present the confirmation and characterisation of GJ 3473 b (G 50-16, TOI-488.01), a hot Earth-sized planet orbiting an M4 dwarf star, whose transiting signal (P = 1.1980035 ± 0.0000018 d) was first detected by the Transiting Exoplanet Survey Satellite (TESS). Through a joint modelling of follow-up radial velocity observations with CARMENES, IRD, and HARPS together with extensive ground-based photometric follow-up observations with LCOGT, MuSCAT, and MuSCAT2, we determined a precise planetary mass, Mb = 1.86 ± 0.30 M⊕, and radius, Rb = 1.264 ± 0.050 R⊕. Additionally, we report the discovery of a second, temperate, non-transiting planet in the system, GJ 3473 c, which has a minimum mass, Mc sin i = 7.41 ± 0.91 M⊕, and orbital period, Pc = 15.509 ± 0.033 d. The inner planet of the system, GJ 3473 b, is one of the hottest transiting Earth-sized planets known thus far, accompanied by a dynamical mass measurement, which makes it a particularly attractive target for thermal emission spectroscopy.

Item URL in elib:https://elib.dlr.de/137212/
Document Type:Article
Title:Discovery of a hot, transiting, Earth-sized planet and a second temperate, non-transiting planet around the M4 dwarf GJ 3473 (TOI-488)
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Kemmer, J.Landessternwarte, Zentrum für Astronomie der Universität Heidelberg, Königstuhl 12, 69117 Heidelberg, GermanyUNSPECIFIED
Stock, S.Landessternwarte, Zentrum für Astronomie der Universität Heidelberg, Königstuhl 12, 69117 Heidelberg, GermanyUNSPECIFIED
Kossakowski, D.Max-Planck-Institut für Astronomie, Königstuhl 17, Heidelberg, 69117, GermanyUNSPECIFIED
Kaminski, A.Landessternwarte, Zentrum für Astronomie der Universität Heidelberg, Königstuhl 12, 69117 Heidelberg, GermanyUNSPECIFIED
Molaverdikhani, K.Landessternwarte, Zentrum für Astronomie der Universität Heidelberg, Königstuhl 12, 69117 Heidelberg, Germany; Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, GermanyUNSPECIFIED
Schlecker, M.Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, GermanyUNSPECIFIED
Caballero, J. A.Centro de Astrobiologia (CSIC-INTA), ESAC Campus, Camino Bajo del Castillo s/n, 28692, Villanueva de la Canada, Madrid, SpainUNSPECIFIED
Amado, P. J.Instituto de Astrofisica de Andalucia (IAA-CSIC), Glorieta de la Astronomia s/n, 18008, Granada, SpainUNSPECIFIED
Astudillo-Defru, N.Departamento de Matemática y Físíca Aplicadas, Universidad Católica de la Santísima Concepción, Alonso de Rivera 2850, Concepción, ChileUNSPECIFIED
Bonfils, X.Université Grenoble Alpes, FranceUNSPECIFIED
Ciardi, David R.Caltech/IPAC-NASA Exoplanet Science Institute, Pasadena, CA, USAUNSPECIFIED
Collins, K. A.Center for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USAUNSPECIFIED
Espinoza, N.Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD, 21218, USAUNSPECIFIED
Fukui, A.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku,Tokyo 113-0033, Japan; Instituto de Astrofísica de Canarias (IAC), 38205 La Laguna, Tenerife, SpainUNSPECIFIED
Hirano, T.Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, JapanUNSPECIFIED
Jenkins, J.M.NASA Ames Research Center, Moffett Field, CA, 94035, USAUNSPECIFIED
Latham, D.W.Center for Astrophysics ∣ Harvard & Smithsonian, 60 Garden Street, Cambridge, MA, 02138, USAUNSPECIFIED
Matthews, ElisabethDepartment of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USAUNSPECIFIED
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
Palle, E.Instituto de Astrofísica de Canarias (IAC), 38205 La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206 La Laguna, Tenerife, SpainUNSPECIFIED
Parviainen, H.Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna, 38206, La Laguna, Tenerife, SpainUNSPECIFIED
Quirrenbach, A.Landessternwarte, Zentrum fur Astronomie der Universtat Heidelberg, Konigstuhl 12, 69117, Heidelberg, GermanyUNSPECIFIED
Reiners, A.Institut fur Astrophysik, Georg-August-Universitat, Friedrich-Hund-Platz 1, 37077, Gottingen, GermanyUNSPECIFIED
Ribas, I.Institut de Ciencies de l'Espai (ICE, CSIC), C/Can Magrans, s/n, Campus UAB, 08193, Bellaterra, Spain; Institut d'Estudis Espacials de Catalunya (IEEC), 08034, Barcelona, SpainUNSPECIFIED
Ricker, G.Department of Physics and Kavli Institute for Astrophysics and Space Research, MIT, Cambridge, MA, 02139, USAUNSPECIFIED
Schlieder, JoshuaNASA Goddard Space Flight Center, 8800 Greenbelt Road, MD, 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, USAUNSPECIFIED
Vanderspek, R.Department of Physics and Kavli Institute for Astrophysics and Space Research, MIT, Cambridge, MA, 02139, USAUNSPECIFIED
Winn, J.N.Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ, 08544, USAUNSPECIFIED
Almenara, J. M.Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, FranceUNSPECIFIED
Bejar, V.Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain | Departamento de Astrofisica, Universidad de La Laguna, 38206 La Laguna, SpainUNSPECIFIED
Bluhm, P.Landessternwarte, Zentrum für Astronomie der Universität Heidelberg, Königstuhl 12, 69117 Heidelberg, GermanyUNSPECIFIED
Bouchy, F.Observatoire de Genève, Sauverny, SwitzerlandUNSPECIFIED
Boyd, P.NASA Goddard Space Flight Center, 8800 Greenbelt Road, Greenbelt, MD 20771, USAUNSPECIFIED
Christiansen, Jessie L.NASA Exoplanet Science Institute, Caltech, Pasadena, CA, USAUNSPECIFIED
Cifuentes, C.Centro de Astrobiología (CSIC-INTA), ESAC, Camino bajo del castillo s/n, 28692 Villanueva de la Cañada, Madrid, SpainUNSPECIFIED
Cloutier, R.Center for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USAUNSPECIFIED
Collins, K.I.George Mason University, 4400 University Drive, Fairfax, VA, 22030, USAUNSPECIFIED
Cortés-Contreras, M.Centro de Astrobiología (CSIC-INTA), ESAC, Camino bajo del castillo s/n, 28692 Villanueva de la Cañada, Madrid, SpainUNSPECIFIED
Crossfield, Ian J.M.Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USAUNSPECIFIED
Crouzet, N.European Space Agency, ESTEC, Keplerlaan 1, 2201 AZ Noordwijk, The NetherlandsUNSPECIFIED
de Leon, J.P.Department of Astronomy, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, JapanUNSPECIFIED
Della-Rose, D.D.Department of Physics, United States Air Force Academy, Colorado, CO 80840, USAUNSPECIFIED
Delfosse, X.Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, FranceUNSPECIFIED
Dreizler, S.Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, 37077 Göttingen, GermanyUNSPECIFIED
Esparza-Borges, E.Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206, La Laguna Tenerife, SpainUNSPECIFIED
Essack, Z.Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139,USA; Department of Aeronautics and Astronautics, MIT, Cambridge, MA 02139, USAUNSPECIFIED
Forveille, Th.Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, FranceUNSPECIFIED
Figueira, P.European Southern Observatory, Alonso de Cordova 3107, Vitacura, Santiago, Chile; Instituto de Astrofisica e Ciencias do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, PortugalUNSPECIFIED
Galadí-Enríquez, D.Centro Astronómico Hispano-Alemán, Observatorio de Calar Alto,Sierra de los Filabres, 04550 Gérgal, SpainUNSPECIFIED
Gan, T.Department of Astronomy, Tsinghua University, Beijing 100084, PR ChinaUNSPECIFIED
Glidden, A.Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía s/n, 18008 Granada, SpainUNSPECIFIED
Gonzales, Erica J.Department of Astronomy and Astrophysics, University of California at Santa Cruz, Santa Cruz, CA, USAUNSPECIFIED
Guerra, P.Observatori Astronómic Albanyá, Camí de Bassegoda s/n, Albanyá 17733, Girona, SpainUNSPECIFIED
Harakawa, H.Subaru Telescope, 650 N. Aohoku Place, Hilo, HI 96720, USAUNSPECIFIED
Hatzes, A.P.Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, GermanyUNSPECIFIED
Henning, ThomasMax-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, GermanyUNSPECIFIED
Herrero, E.Institut d'Estudis Espacials de Catalunya (IEEC), 08034, Barcelona, SpainUNSPECIFIED
Hodapp, K.University of Hawaii, Institute for Astronomy, 640 N. Aohoku Place, Hilo, HI 96720, USAUNSPECIFIED
Hori, Y.Astrobiology Center, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, JapanUNSPECIFIED
Howell, S.NASA Ames Research Center, Moffett Field, CA 94035, USAUNSPECIFIED
Ikoma, M.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo113-0033, JapanUNSPECIFIED
Isogai, K.Okayama Observatory, Kyoto University, 3037-5 Honjo, Kamogata-cho, Asakuchi, Okayama 719-0232, JapanUNSPECIFIED
Jeffers, S. V.Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, 37077 Göttingen, GermanyUNSPECIFIED
Kurster, M.Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, GermanyUNSPECIFIED
Kawauchi, K.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku,Tokyo 113-0033, JapanUNSPECIFIED
Kimura, T.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo113-0033, JapanUNSPECIFIED
Klagyivik, PeterPeter.Klagyivik (at) dlr.dehttps://orcid.org/0000-0003-0700-6176
Kotani, T.Astrobiology Center, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; Department of Astronomical Science, The Graduated University for Advanced Studies, SOKENDAI, 2-21-1,UNSPECIFIED
Kurokawa, T.National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; Tokyo University of Agriculture and Technology, 3-8-1, Saiwai-cho, Fuchu, Tokyo 183-0054, JapanUNSPECIFIED
Kusakabe, N.National Astronomical Observatory of Japan, NINS, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan; Astrobiology Center, NINS, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, JapanUNSPECIFIED
Kuzuhara, M.National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; Tokyo University of Agriculture and Technology, 3-8-1, Saiwai-cho, Fuchu, Tokyo 183-0054, JapanUNSPECIFIED
Lafarga, M.Institut de Ciencies de l' Espai (ICE, CSIC), C/Can Magrans, s/n, Campus UAB, 08193, Bellaterra, Spain; Institut d'Estudis Espacials de Catalunya (IEEC), 08034, Barcelona, SpainUNSPECIFIED
Livingston, J.H.Department of Astronomy, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, JapanUNSPECIFIED
Luque, R.Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna, 38206, La Laguna, Tenerife, SpainUNSPECIFIED
Matson, R.U.S. Naval Observatory, 3450 Massachusetts Avenue NW, Washington, D.C. 20392, USAUNSPECIFIED
Morales, J. C.Institut de Ciencies de l'Espai (ICE, CSIC), C/Can Magrans, s/n, Campus UAB, 08193, Bellaterra, Spain; Institut d'Estudis Espacials de Catalunya (IEEC), 08034, Barcelona, SpainUNSPECIFIED
Mori, MayukoDepartment of Astronomy, The University of Tokyo, Tokyo, JapanUNSPECIFIED
Muirhead, P.S.Department of Astronomy, Institute for Astrophysical Research, Boston University, 725 Commonwealth Ave. Room 514, Boston, MA02215, USAUNSPECIFIED
Murgas, F.Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, SpainUNSPECIFIED
Nishikawa, J.National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; Astrobiology Center, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; Department of Astronomical Science, The Graduated University for Advanced Studies, SOKENDAI, 2-21-1,UNSPECIFIED
Nishiumi, T.Department of Astronomical Science, The Graduated University for Advanced Studies, SOKENDAI, 2-21-1, Osawa, Mitaka,Tokyo 181-8588 Japan; National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, JapanUNSPECIFIED
Omiya, M.Astrobiology Center, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, JapanUNSPECIFIED
Reffert, S.Landessternwarte, Zentrum für Astronomie der Universität Heidelberg, Königstuhl 12, 69117 Heidelberg, GermanyUNSPECIFIED
Rodríguez López, C.Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía s/n, 18008 Granada, SpainUNSPECIFIED
Santos, N.C.instituto de astrofísica e ciências do espaço, universidade de porto, caup, rua das estrelas, 4150-762 porto, portugal; Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 4169-007 Porto, PortugalUNSPECIFIED
Schöfer, P.Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, 37077 Göttingen, GermanyUNSPECIFIED
Schwarz, R.P.Patashnick Voorheesville Observatory, Voorheesville, NY 12186, USAUNSPECIFIED
Shiao, B.Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USAUNSPECIFIED
Tamura, M.Department of Astronomy, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan; National Astronomical Observatory of Japan, NINS, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan; Astrobiology Center, NINS, 2-21-1 Osawa, Mitaka, Tokyo, 181-8UNSPECIFIED
Terada, Y.Department of Astronomy, The University of Tokyo 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-0033, JapanUNSPECIFIED
Twicken, J.D.NASA Ames Research Center, Moffett Field, CA 94035, USA; SETI Institute, Mountain View, CA 94043, USAUNSPECIFIED
Ueda, A.National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; Astrobiology Center, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; Department of Astronomical Science, The Graduated University for Advanced Studies, SOKENDAI, 2-21-1,UNSPECIFIED
Vievard, S.Subaru Telescope, 650 N. Aohoku Place, Hilo, HI 96720, USAUNSPECIFIED
Watanabe, N.Department of Astronomical Science, The Graduated University for Advanced Studies, SOKENDAI, 2-21-1, Osawa, Mitaka,Tokyo 181-8588 Japan; Astrobiology Center of NINS, 2-21-1, Osawa, Mitaka, Tokyo 181-8588, Japan; National Astronomical Observatory of Japan,UNSPECIFIED
Zechmeister, M.Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, 37077 Göttingen, GermanyUNSPECIFIED
Date:October 2020
Journal or Publication Title:Astronomy and Astrophysics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:642
DOI:10.1051/0004-6361/202038967
Page Range:A236
Publisher:EDP Sciences
ISSN:0004-6361
Status:Published
Keywords:planetary systems, planets and satellites: detection, techniques: radial velocities, techniques: photometric, stars: late-type, stars: individual: G 50-16, 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 - Exploration of the Solar System
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Deposited By: Klagyivik, Peter
Deposited On:06 Nov 2020 13:18
Last Modified:06 Nov 2020 13:18

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