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dc.contributor.authorBurt, Jennifer A
dc.contributor.authorBurke, Chris
dc.contributor.authorDragomir, Diana
dc.contributor.authorDynes, Scott Bc
dc.contributor.authorRicker, George R
dc.contributor.authorSeager, Sara
dc.contributor.authorVanderspeck, R.
dc.date.accessioned2020-06-19T20:42:59Z
dc.date.available2020-06-19T20:42:59Z
dc.date.issued2019-06
dc.date.submitted2019-04
dc.identifier.issn1432-0746
dc.identifier.urihttps://hdl.handle.net/1721.1/125897
dc.description.abstractWe 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 is to 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.en_US
dc.language.isoen
dc.publisherEDP Sciencesen_US
dc.relation.isversionof10.1051/0004-6361/201935801en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceAstronomy and Astrophysicsen_US
dc.titlePlanetary system around the nearby M dwarf GJ 357 including a transiting, hot, Earth-sized planet optimal for atmospheric characterizationen_US
dc.typeArticleen_US
dc.identifier.citationLuque, R., et al., "Planetary system around the nearby M dwarf GJ 357 including a transiting, hot, Earth-sized planet optimal for atmospheric characterization." Astronomy & Astrophysics 628 (2019): no. A39 doi 10.1051/0004-6361/201935801 ©2019 Author(s)en_US
dc.contributor.departmentMIT Kavli Institute for Astrophysics and Space Researchen_US
dc.relation.journalAstronomy & Astrophysicsen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dc.date.updated2020-01-15T14:22:43Z
dspace.orderedauthorsR. Luque ; E. Pallé ; D. Kossakowski ; S. Dreizler ; J. Kemmer ; N. Espinoza ; J. Burt ; ?? ; G. Anglada-Escudé ; V. J. S. Béjar ; J. A. Caballero ; K. A. Collins ; K. I. Collins ; M. Cortés-Contreras ; E. Díez-Alonso ; F. Feng ; A. Hatzes ; C. Hellier ; T. Henning ; S. V. Jeffers ; L. Kaltenegger ; M. Kürster ; J. Madden ; K. Molaverdikhani ; D. Montes ; N. Narita ; G. Nowak ; A. Ofir ; M. Oshagh ; H. Parviainen ; A. Quirrenbach ; S. Reffert ; A. Reiners ; C. Rodríguez-López ; M. Schlecker ; S. Stock ; T. Trifonov ; J. N. Winn ; M. R. Zapatero Osorio ; M. Zechmeister ; P. J. Amado ; D. R. Anderson ; N. E. Batalha ; F. F. Bauer ; P. Bluhm ; C. J. Burke ; R. P. Butler ; D. A. Caldwell ; G. Chen ; J. D. Crane ; D. Dragomir ; C. D. Dressing ; S. Dynes ; J. M. Jenkins ; A. Kaminski ; H. Klahr ; T. Kotani ; M. Lafarga ; D. W. Latham ; P. Lewin ; S. McDermott ; P. Montañés-Rodríguez ; J. C. Morales ; F. Murgas ; E. Nagel ; S. Pedraz ; I. Ribas ; G. R. Ricker ; P. Rowden ; S. Seager ; S. A. Shectman ; M. Tamura ; J. Teske ; J. D. Twicken ; R. Vanderspeck ; S. X. Wang ; B. Wohleren_US
dspace.date.submission2020-01-15T14:22:46Z
mit.journal.volume628en_US


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