Planetary system around the nearby M dwarf GJ 357 including a transiting, hot, Earth-sized planet optimal for atmospheric characterization
文献类型：期刊论文
| 作者 | Luque, R.1,2; Palle, E.1,2; Kossakowski, D.3; Dreizler, S.4; Kemmer, J.5; Espinoza, N.3; Burt, J.6; Anglada-Escude, G.7,8; Bejar, V. J. S.1,2; Caballero, J. A.9 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
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| 出版日期 | 2019-08-06 |
| 卷号 | 628页码:18 |
| ISSN号 | 1432-0746 |
| 关键词 | planetary systems techniques: photometric techniques: radial velocities stars: individual: G1 357 stars: late-type |
| DOI | 10.1051/0004-6361/201935801 |
| 通讯作者 | Luque, R.(rluque@iac.es) |
| 英文摘要 | 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 (T-eq = 525 +/- 11 K) with a radius of R-b = 1.217 +/- 0.084 R-circle plus and an orbital period of P-b = 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 M-b = 1.84 +/- 0.31 M-circle plus. 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 M-c = 3.40 +/- 0.46 M-circle plus in a 9.12 d orbit, and GJ 357 d, with a minimum mass of M-d = 6.1 +/- 1.0 M-circle plus in a 55.7 d orbit inside the habitable zone. The host is relatively inactive and exhibits a photometric rotation period of P-rot = 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. |
| WOS关键词 | ECHELLE SPECTROMETER ; BAYESIAN-INFERENCE ; ERROR-CORRECTION ; GIANT PLANETS ; MASS ; PRECISION ; EXOPLANET ; SKY ; SEARCH ; STARS |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | EDP SCIENCES S A |
| WOS记录号 | WOS:000479054700001 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/28047]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Luque, R. |
| 作者单位 | 1.Inst Astrofis Canarias, Tenerife 38205, Spain 2.Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain 3.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany 4.Georg August Univ, Inst Astrophys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany 5.Heidelberg Univ, Landessternwarte, Zentrum Astron, Konigstuhl 12, D-69117 Heidelberg, Germany 6.MIT, Kavli Inst Astrophys & Space Res, 77 Massachusetts Ave, Cambridge, MA 02139 USA 7.Queen Mary Univ London, Sch Phys & Astron, 327 Mile End Rd, London E1 4NS, England 8.CSIC, IAA, Glorieta Astron S-N, E-18008 Granada, Spain 9.ESAC, CSIC, Ctr Astrobiol, INTA, Camino Bajo Castillo S-N, Madrid 28692, Spain 10.Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA |
| 推荐引用方式 GB/T 7714 | Luque, R.,Palle, E.,Kossakowski, D.,et al. Planetary system around the nearby M dwarf GJ 357 including a transiting, hot, Earth-sized planet optimal for atmospheric characterization[J]. ASTRONOMY & ASTROPHYSICS,2019,628:18. |
| APA | Luque, R..,Palle, E..,Kossakowski, D..,Dreizler, S..,Kemmer, J..,...&Wohler, B..(2019).Planetary system around the nearby M dwarf GJ 357 including a transiting, hot, Earth-sized planet optimal for atmospheric characterization.ASTRONOMY & ASTROPHYSICS,628,18. |
| MLA | Luque, 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):18. |
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来源：紫金山天文台
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