Radial velocities of GJ 357 Virtual Observatory Resource

Authors

1. Luque R.
2. Palle E.
3. Kossakowski D.
4. Dreizler S.
5. Kemmer J.
6. Espinoza N.,Burt J.
7. Anglada-Escude G.
8. Bejar V.J.S.
9. Caballero J.A.
10. Collins K.A.,Collins K.I.
11. Cortes-Contreras M.
12. Diez-Alonso E.
13. Feng F.
14. Hatzes A.,Hellier C.
15. Henning T.
16. Jeffers S.V.
17. Kaltenegger L.
18. Kuerster M.,Madden J.
19. Molaverdikhani K.
20. Montes D.
21. Narita N.
22. Nowak G.
23. Ofir A.,Oshagh M.
24. Parviainen H.
25. Quirrenbach A.
26. Reffert S.
27. Reiners A.,Rodriguez-Lopez C.
28. Schlecker M.
29. Stock S.
30. Trifonov T.
31. Winn J.N.,Zapatero Osorio M.R.
32. Zechmeister M.
33. Amado P.J.
34. Anderson D.R.,Batalha N.E.
35. Bauer F.F.
36. Bluhm P.
37. Burke C.J.
38. Butler R.P.
39. Caldwell D.A.,Chen G.
40. Crane J.D.
41. Dragomir D.
42. Dressing C.D.
43. Dynes S.
44. Jenkins J.M.,Kaminski A.
45. Klahr H.
46. Kotani T.
47. Lafarga M.
48. Latham D.W.
49. Lewin P.,McDermott S.
50. Montanes-Rodriguez P.
51. Morales J.C.
52. Murgas F.
53. Nagel E.,Pedraz S.
54. Ribas I.
55. Ricker G.R.
56. Rowden P.
57. Seager S.
58. Shectman S.A.,Tamura M.
59. Teske J.
60. Twicken J.D.
61. Vanderspeck R.
62. Wang S.X.
63. Wohler B.

Published by

CDS

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+/-11K) with a radius of R_b_=1.217+/-0.084R_{Earth}_ and an orbital period of P_b_=3.93d. 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 existence of the planet and leading to a planetary mass of M_b_=1.84+/-0.31M_{Earth}_. In addition to the radial velocity signal for GJ 357 b, more periodicities are present in the data indicating the presence of two more planets in the system: GJ 357 c, with a minimum mass of M_c_=3.40+/-0.46M_{Earth}_ in a 9.12d orbit, and GJ 357 d, with a minimum mass of M_d_=6.1+/-1.0M_{Earth}_ in a 55.7d orbit inside the habitable zone. The host is relatively inactive and exhibits a photometric rotation period of Prot=78+/-2d. 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.

Keywords

1. multiple-stars
2. exoplanets
3. radial-velocity

Bibliographic source Bibcode

2019A&A...628A..39L

See also HTML

https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/628/A39

IVOA Identifier IVOID

ivo://CDS.VizieR/J/A+A/628/A39

Document Object Identifer DOI

doi:10.26093/cds/vizier.36280039

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https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/628/A39
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/628/A39

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