Dr. Astudillo-Defru, Nicola

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Dr. Astudillo-Defru, Nicola
Nombre completo
Astudillo Defru, Nicola
Facultad
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nastudillo@ucsc.cl
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Author: Collins, Kevin I. × Subject: Planetary systems ×

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    Publication
    Discovery of a hot, transiting, Earth-sized planet and a second temperate, non-transiting planet around the M4 dwarf GJ 3473 (TOI-488)
    (Astronomy & Astrophysics, 2020)
    Kemmer, J.
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    Stock, S.
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    Kossakowski, D.
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    Kaminski, A.
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    Molaverdikhani, K.
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    Schlecker, M.
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    Caballero, J. A.
    ;
    Amado, P. J.
    ;
    Dr. Astudillo-Defru, Nicola 
    ;
    Bonfils, X.
    ;
    Ciardi, David
    ;
    Collins, Karen A.
    ;
    Espinoza, N.
    ;
    Fukui, A.
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    Hirano, T.
    ;
    Jenkins, J. M.
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    Latham, D. W.
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    Matthews, E. C.
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    Narita, N.
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    Pallé, E.
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    Parviainen, H.
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    Quirrenbach, A.
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    Reiners, A.
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    Ribas, I.
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    Ricker, G.
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    Schlieder, J. E.
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    Seager, S.
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    Vanderspek, R.
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    Winn, J. N.
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    Almenara, José Manuel
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    Bejar, V. J. S.
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    Bluhm, P.
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    Bouchy, F.
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    Boyd, P.
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    Christiansen, J. L.
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    Cifuentes, C.
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    Cloutier, Ryan
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    Collins, Kevin I.
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    Cortés Contreras, M.
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    Crossfield, Ian J. M.
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    Crouzet, N.
    ;
    de Leon, J. P.
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    Della Rose, D. D.
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    Delfosse, X.
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    Dreizler, S.
    ;
    Esparza Borges, E.
    ;
    Essack, Z.
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    Forveille, Th.
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    Figueira, P.
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    Galadí Enríquez, D.
    ;
    Gan, T.
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    Glidden, A.
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    Gonzales, E. J.
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    Guerra, P.
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    Harakawa, H.
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    Hatzes, A. P.
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    Henning, Th.
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    Herrero, E.
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    Hodapp, K.
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    Hori, Y.
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    Howell, S. B.
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    Ikoma, M.
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    Isogai, K.
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    Jeffers, S. V.
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    Kürster, M.
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    Kawauchi, K.
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    Kimura, T.
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    Klagyivik, P.
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    Kotani, T.
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    Kurokawa, T.
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    Kusakabe, N.
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    Kuzuhara, M.
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    Lafarga, M.
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    Livingston, J. H.
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    Luque, R.
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    Matson, R.
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    Morales, J. C.
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    Mori, M.
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    Muirhead, P. S.
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    Murgas, F.
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    Nishikawa, J.
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    Nishiumi, T.
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    Omiya, M.
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    Reffert, S.
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    Rodríguez López, C.
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    Santos, N. C.
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    Schöfer, P.
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    Schwarz, R. P.
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    Shiao, B.
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    Tamura, M.
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    Terada, Y.
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    Twicken, J. D.
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    Ueda, A.
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    Vievard, S.
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    Watanabe, N.
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    Zechmeister, M.
    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 = 1.198 003 5 ± 0.000 001 8 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.