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Planetary system around the nearby M dwarf GJ 357 including a transiting, hot, Earth-sized planet optimal for atmospheric characterization

MPS-Authors

Luque,  R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Pallé,  E.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kossakowski,  D.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Dreizler,  S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kemmer,  J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Espinoza,  N.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Burt,  J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Anglada-Escudé,  G.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Béjar,  V. J. S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Caballero,  J. A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Collins,  K. A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Collins,  K. I.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Cortés-Contreras,  M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Díez-Alonso,  E.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Feng,  F.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hatzes,  A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hellier,  C.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Henning,  T.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Jeffers,  S. V.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kaltenegger,  L.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kürster,  M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Madden,  J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Molaverdikhani,  K.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Montes,  D.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Narita,  N.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Nowak,  G.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ofir,  A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Oshagh,  M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Parviainen,  H.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Quirrenbach,  A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Reffert,  S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Reiners,  A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Rodríguez-López,  C.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Schlecker,  M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Stock,  S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Trifonov,  T.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Winn,  J. N.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Zapatero Osorio,  M. R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Zechmeister,  M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Amado,  P. J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Anderson,  D. R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Batalha,  N. E.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bauer,  F. F.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bluhm,  P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Burke,  C. J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Butler,  R. P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Caldwell,  D. A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Chen,  G.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Crane,  J. D.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Dragomir,  D.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Dressing,  C. D.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Dynes,  S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Jenkins,  J. M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kaminski,  A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Klahr,  H.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kotani,  T.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lafarga,  M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Latham,  D. W.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lewin,  P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

McDermott,  S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Montañés-Rodríguez,  P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Morales,  J. C.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Murgas,  F.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Nagel,  E.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Pedraz,  S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ribas,  I.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ricker,  G. R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Rowden,  P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Seager,  S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Shectman,  S. A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Tamura,  M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Teske,  J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Twicken,  J. D.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Vanderspeck,  R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Wang,  S. X.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Wohler,  B.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

External Resource

https://ui.adsabs.harvard.edu/abs/2019A&A...628A..39L
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Citation

Luque, R., Pallé, E., Kossakowski, D., Dreizler, S., Kemmer, J., Espinoza, N., et al. (2019). Planetary system around the nearby M dwarf GJ 357 including a transiting, hot, Earth-sized planet optimal for atmospheric characterization. Astronomy and Astrophysics, 628.


Cite as: https://hdl.handle.net/21.11116/0000-0005-D319-1
Abstract
We report the detection of a transiting Earth-size planet around GJ 357, a nearby M2.5 V star, using data from the Transiting Exoplanet Survey Satellite (TESS). GJ 357 b (TOI-562.01) is a transiting, hot, Earth- sized planet (Teq = 525 ± 11 K) with a radius of Rb = 1.217 ± 0.084 R⊕ and an orbital period of Pb = 3.93 d. Precise stellar radial velocities from CARMENES and PFS, as well as archival data from HIRES, UVES, and HARPS also display a 3.93-day periodicity, confirming the planetary nature and leading to a planetary mass of Mb = 1.84 ± 0.31 M⊕. In addition to the radial velocity signal for GJ 357 b, more periodicities are present in the data indicating the presence of two further planets in the system: GJ 357 c, with a minimum mass of Mc = 3.40 ± 0.46 M⊕ in a 9.12 d orbit, and GJ 357 d, with a minimum mass of Md = 6.1 ± 1.0 M⊕ in a 55.7 d orbit inside the habitable zone. The host is relatively inactive and exhibits a photometric rotation period of Prot = 78 ± 2 d. GJ 357 b isto date the second closest transiting planet to the Sun, making it a prime target for further investigations such as transmission spectroscopy. Therefore, GJ 357 b represents one of the best terrestrial planets suitable for atmospheric characterization with the upcoming JWST and ground-based ELTs. RV data are only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (ftp://130.79.128.5) or via <A href="http://cdsarc.u-strasbg.fr/viz- bin/qcat?J/A+A/628/A39">http://cdsarc.u-strasbg.fr/viz- bin/qcat?J/A+A/628/A39</A>