Discovery of a hot, transiting, Earth-sized planet and a second temperate, non-transiting planet around the M4 dwarf GJ 3473 (TOI-488)
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-u...
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| Hauptverfasser: | , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
23 October 2020
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| In: |
Astronomy and astrophysics
Year: 2020, Jahrgang: 642, Pages: 1-20 |
| ISSN: | 1432-0746 |
| DOI: | 10.1051/0004-6361/202038967 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1051/0004-6361/202038967 Verlag, lizenzpflichtig, Volltext: https://www.aanda.org/articles/aa/abs/2020/10/aa38967-20/aa38967-20.html 
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| Verfasserangaben: | J. Kemmer, S. Stock, D. Kossakowski, A. Kaminski, K. Molaverdikhani, M. Schlecker, J.A. Caballero, P.J. Amado, N. Astudillo-Defru, X. Bonfils, D. Ciardi, K.A. Collins, N. Espinoza, A. Fukui, T. Hirano, J.M. Jenkins, D.W. Latham, E. C. Matthews, N. Narita, E. Pallé, H. Parviainen, A. Quirrenbach, A. Reiners, I. Ribas, G. Ricker, J.E. Schlieder, S. Seager, R. Vanderspek, J.N. Winn, J.M. Almenara, V.J.S. Béjar, P. Bluhm, F. Bouchy, P. Boyd, J.L. Christiansen, C. Cifuentes, R. Cloutier, K.I. Collins, M. Cortés-Contreras, I.J.M. Crossfield, N. Crouzet, J.P. de Leon, D.D. Della-Rose, X. Delfosse, S. Dreizler, E. Esparza-Borges, Z. Essack, Th Forveille, P. Figueira, D. Galadí-Enríquez, T. Gan, A. Glidden, E.J. Gonzales, P. Guerra, H. Harakawa, A.P. Hatzes, Th Henning, E. Herrero, K. Hodapp, Y. Hori, S.B. Howell, M. Ikoma, K. Isogai, S.V. Jeffers, M. Kürster, K. Kawauchi, T. Kimura, P. Klagyivik, T. Kotani, T. Kurokawa, N. Kusakabe, M. Kuzuhara, M. Lafarga, J.H. Livingston, R. Luque, R. Matson, J.C. Morales, M. Mori, P.S. Muirhead, F. Murgas, J. Nishikawa, T. Nishiumi, M. Omiya, S. Reffert, C. Rodríguez López, N.C. Santos, P. Schöfer, R.P. Schwarz, B. Shiao, M. Tamura, Y. Terada, J.D. Twicken, A. Ueda, S. Vievard, N. Watanabe, and M. Zechmeister |
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| 245 | 1 | 0 | |a Discovery of a hot, transiting, Earth-sized planet and a second temperate, non-transiting planet around the M4 dwarf GJ 3473 (TOI-488) |c J. Kemmer, S. Stock, D. Kossakowski, A. Kaminski, K. Molaverdikhani, M. Schlecker, J.A. Caballero, P.J. Amado, N. Astudillo-Defru, X. Bonfils, D. Ciardi, K.A. Collins, N. Espinoza, A. Fukui, T. Hirano, J.M. Jenkins, D.W. Latham, E. C. Matthews, N. Narita, E. Pallé, H. Parviainen, A. Quirrenbach, A. Reiners, I. Ribas, G. Ricker, J.E. Schlieder, S. Seager, R. Vanderspek, J.N. Winn, J.M. Almenara, V.J.S. Béjar, P. Bluhm, F. Bouchy, P. Boyd, J.L. Christiansen, C. Cifuentes, R. Cloutier, K.I. Collins, M. Cortés-Contreras, I.J.M. Crossfield, N. Crouzet, J.P. de Leon, D.D. Della-Rose, X. Delfosse, S. Dreizler, E. Esparza-Borges, Z. Essack, Th Forveille, P. Figueira, D. Galadí-Enríquez, T. Gan, A. Glidden, E.J. Gonzales, P. Guerra, H. Harakawa, A.P. Hatzes, Th Henning, E. Herrero, K. Hodapp, Y. Hori, S.B. Howell, M. Ikoma, K. Isogai, S.V. Jeffers, M. Kürster, K. Kawauchi, T. Kimura, P. Klagyivik, T. Kotani, T. Kurokawa, N. Kusakabe, M. Kuzuhara, M. Lafarga, J.H. Livingston, R. Luque, R. Matson, J.C. Morales, M. Mori, P.S. Muirhead, F. Murgas, J. Nishikawa, T. Nishiumi, M. Omiya, S. Reffert, C. Rodríguez López, N.C. Santos, P. Schöfer, R.P. Schwarz, B. Shiao, M. Tamura, Y. Terada, J.D. Twicken, A. Ueda, S. Vievard, N. Watanabe, and M. Zechmeister |
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| 520 | |a 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. | ||
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