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.

PDF - Published version
6MB

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:

Authors	Institution or Email of Authors	Author's ORCID iD
Kemmer, J.	Landessternwarte, Zentrum für Astronomie der Universität Heidelberg, Königstuhl 12, 69117 Heidelberg, Germany	UNSPECIFIED
Stock, S.	Landessternwarte, Zentrum für Astronomie der Universität Heidelberg, Königstuhl 12, 69117 Heidelberg, Germany	UNSPECIFIED
Kossakowski, D.	Max-Planck-Institut für Astronomie, Königstuhl 17, Heidelberg, 69117, Germany	UNSPECIFIED
Kaminski, A.	Landessternwarte, Zentrum für Astronomie der Universität Heidelberg, Königstuhl 12, 69117 Heidelberg, Germany	UNSPECIFIED
Molaverdikhani, K.	Landessternwarte, Zentrum für Astronomie der Universität Heidelberg, Königstuhl 12, 69117 Heidelberg, Germany; Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany	UNSPECIFIED
Schlecker, M.	Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany	UNSPECIFIED
Caballero, J. A.	Centro de Astrobiologia (CSIC-INTA), ESAC Campus, Camino Bajo del Castillo s/n, 28692, Villanueva de la Canada, Madrid, Spain	UNSPECIFIED
Amado, P. J.	Instituto de Astrofisica de Andalucia (IAA-CSIC), Glorieta de la Astronomia s/n, 18008, Granada, Spain	UNSPECIFIED
Astudillo-Defru, N.	Departamento de Matemática y Físíca Aplicadas, Universidad Católica de la Santísima Concepción, Alonso de Rivera 2850, Concepción, Chile	UNSPECIFIED
Bonfils, X.	Université Grenoble Alpes, France	UNSPECIFIED
Ciardi, David R.	Caltech/IPAC-NASA Exoplanet Science Institute, Pasadena, CA, USA	UNSPECIFIED
Collins, K. A.	Center for Astrophysics \| Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA	UNSPECIFIED
Espinoza, N.	Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD, 21218, USA	UNSPECIFIED
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, Spain	UNSPECIFIED
Hirano, T.	Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan	UNSPECIFIED
Jenkins, J.M.	NASA Ames Research Center, Moffett Field, CA, 94035, USA	UNSPECIFIED
Latham, D.W.	Center for Astrophysics ∣ Harvard & Smithsonian, 60 Garden Street, Cambridge, MA, 02138, USA	UNSPECIFIED
Matthews, Elisabeth	Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USA	UNSPECIFIED
Narita, Norio	Komaba 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, Spain	UNSPECIFIED
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, Spain	UNSPECIFIED
Parviainen, H.	Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna, 38206, La Laguna, Tenerife, Spain	UNSPECIFIED
Quirrenbach, A.	Landessternwarte, Zentrum fur Astronomie der Universtat Heidelberg, Konigstuhl 12, 69117, Heidelberg, Germany	UNSPECIFIED
Reiners, A.	Institut fur Astrophysik, Georg-August-Universitat, Friedrich-Hund-Platz 1, 37077, Gottingen, Germany	UNSPECIFIED
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, Spain	UNSPECIFIED
Ricker, G.	Department of Physics and Kavli Institute for Astrophysics and Space Research, MIT, Cambridge, MA, 02139, USA	UNSPECIFIED
Schlieder, Joshua	NASA Goddard Space Flight Center, 8800 Greenbelt Road, MD, USA	UNSPECIFIED
Seager, Sara	Department 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	UNSPECIFIED
Vanderspek, R.	Department of Physics and Kavli Institute for Astrophysics and Space Research, MIT, Cambridge, MA, 02139, USA	UNSPECIFIED
Winn, J.N.	Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ, 08544, USA	UNSPECIFIED
Almenara, J. M.	Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, France	UNSPECIFIED
Bejar, V.	Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain \| Departamento de Astrofisica, Universidad de La Laguna, 38206 La Laguna, Spain	UNSPECIFIED
Bluhm, P.	Landessternwarte, Zentrum für Astronomie der Universität Heidelberg, Königstuhl 12, 69117 Heidelberg, Germany	UNSPECIFIED
Bouchy, F.	Observatoire de Genève, Sauverny, Switzerland	UNSPECIFIED
Boyd, P.	NASA Goddard Space Flight Center, 8800 Greenbelt Road, Greenbelt, MD 20771, USA	UNSPECIFIED
Christiansen, Jessie L.	NASA Exoplanet Science Institute, Caltech, Pasadena, CA, USA	UNSPECIFIED
Cifuentes, C.	Centro de Astrobiología (CSIC-INTA), ESAC, Camino bajo del castillo s/n, 28692 Villanueva de la Cañada, Madrid, Spain	UNSPECIFIED
Cloutier, R.	Center for Astrophysics \| Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA	UNSPECIFIED
Collins, K.I.	George Mason University, 4400 University Drive, Fairfax, VA, 22030, USA	UNSPECIFIED
Cortés-Contreras, M.	Centro de Astrobiología (CSIC-INTA), ESAC, Camino bajo del castillo s/n, 28692 Villanueva de la Cañada, Madrid, Spain	UNSPECIFIED
Crossfield, Ian J.M.	Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USA	UNSPECIFIED
Crouzet, N.	European Space Agency, ESTEC, Keplerlaan 1, 2201 AZ Noordwijk, The Netherlands	UNSPECIFIED
de Leon, J.P.	Department of Astronomy, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan	UNSPECIFIED
Della-Rose, D.D.	Department of Physics, United States Air Force Academy, Colorado, CO 80840, USA	UNSPECIFIED
Delfosse, X.	Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, France	UNSPECIFIED
Dreizler, S.	Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany	UNSPECIFIED
Esparza-Borges, E.	Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206, La Laguna Tenerife, Spain	UNSPECIFIED
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, USA	UNSPECIFIED
Forveille, Th.	Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, France	UNSPECIFIED
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, Portugal	UNSPECIFIED
Galadí-Enríquez, D.	Centro Astronómico Hispano-Alemán, Observatorio de Calar Alto,Sierra de los Filabres, 04550 Gérgal, Spain	UNSPECIFIED
Gan, T.	Department of Astronomy, Tsinghua University, Beijing 100084, PR China	UNSPECIFIED
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, Spain	UNSPECIFIED
Gonzales, Erica J.	Department of Astronomy and Astrophysics, University of California at Santa Cruz, Santa Cruz, CA, USA	UNSPECIFIED
Guerra, P.	Observatori Astronómic Albanyá, Camí de Bassegoda s/n, Albanyá 17733, Girona, Spain	UNSPECIFIED
Harakawa, H.	Subaru Telescope, 650 N. Aohoku Place, Hilo, HI 96720, USA	UNSPECIFIED
Hatzes, A.P.	Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, Germany	UNSPECIFIED
Henning, Thomas	Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany	UNSPECIFIED
Herrero, E.	Institut d'Estudis Espacials de Catalunya (IEEC), 08034, Barcelona, Spain	UNSPECIFIED
Hodapp, K.	University of Hawaii, Institute for Astronomy, 640 N. Aohoku Place, Hilo, HI 96720, USA	UNSPECIFIED
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, Japan	UNSPECIFIED
Howell, S.	NASA Ames Research Center, Moffett Field, CA 94035, USA	UNSPECIFIED
Ikoma, M.	Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo113-0033, Japan	UNSPECIFIED
Isogai, K.	Okayama Observatory, Kyoto University, 3037-5 Honjo, Kamogata-cho, Asakuchi, Okayama 719-0232, Japan	UNSPECIFIED
Jeffers, S. V.	Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany	UNSPECIFIED
Kurster, M.	Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany	UNSPECIFIED
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, Japan	UNSPECIFIED
Kimura, T.	Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo113-0033, Japan	UNSPECIFIED
Klagyivik, Peter	Peter.Klagyivik (at) dlr.de	https://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, Japan	UNSPECIFIED
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, Japan	UNSPECIFIED
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, Japan	UNSPECIFIED
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, Spain	UNSPECIFIED
Livingston, J.H.	Department of Astronomy, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan	UNSPECIFIED
Luque, R.	Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna, 38206, La Laguna, Tenerife, Spain	UNSPECIFIED
Matson, R.	U.S. Naval Observatory, 3450 Massachusetts Avenue NW, Washington, D.C. 20392, USA	UNSPECIFIED
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, Spain	UNSPECIFIED
Mori, Mayuko	Department of Astronomy, The University of Tokyo, Tokyo, Japan	UNSPECIFIED
Muirhead, P.S.	Department of Astronomy, Institute for Astrophysical Research, Boston University, 725 Commonwealth Ave. Room 514, Boston, MA02215, USA	UNSPECIFIED
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, Spain	UNSPECIFIED
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, Japan	UNSPECIFIED
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, Japan	UNSPECIFIED
Reffert, S.	Landessternwarte, Zentrum für Astronomie der Universität Heidelberg, Königstuhl 12, 69117 Heidelberg, Germany	UNSPECIFIED
Rodríguez López, C.	Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía s/n, 18008 Granada, Spain	UNSPECIFIED
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, Portugal	UNSPECIFIED
Schöfer, P.	Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany	UNSPECIFIED
Schwarz, R.P.	Patashnick Voorheesville Observatory, Voorheesville, NY 12186, USA	UNSPECIFIED
Shiao, B.	Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA	UNSPECIFIED
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, 181-8	UNSPECIFIED
Terada, Y.	Department of Astronomy, The University of Tokyo 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan	UNSPECIFIED
Twicken, J.D.	NASA Ames Research Center, Moffett Field, CA 94035, USA; SETI Institute, Mountain View, CA 94043, USA	UNSPECIFIED
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, USA	UNSPECIFIED
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, Germany	UNSPECIFIED

Date:

October 2020

Journal or Publication Title:

Astronomy and Astrophysics

Refereed publication:

Yes

Open Access:

Yes

Gold Open Access:

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

Repository Staff Only: item control page