A sub-Neptune planet around TOI-1695 discovered and characterized with SPIRou and TESS
Flavien Kiefer
(1, 2)
,
Guillaume H. Hébrard
(2, 3)
,
Eder Martioli
(2)
,
Étienne Artigau
(4)
,
René Doyon
(4)
,
Jean François Donati
(5)
,
Charles Cadieux
(4)
,
Andres Carmona
(6)
,
David R. Ciardi
(7)
,
P. I. Cristofari
(5)
,
Leandro de Almeida
(8)
,
Pedro Figueira
(9, 10)
,
Eric J. Gaidos
(11)
,
Eileen C. Gonzales
(12)
,
Alain Lecavelier Des Etangs
(2)
,
Keivan G. Stassun
(13)
,
Laura A. Arnold
(14)
,
Björn Benneke
(4)
,
Isabelle Boisse
(15)
,
Xavier Bonfils
(6)
,
Neil James Cook
(4)
,
Pía Cortés-Zuleta
(16)
,
Xavier Delfosse
(6)
,
Jr Dias Do Nascimento
(17, 18)
,
Michael M. Fausnaugh
(19)
,
William Fong
(19)
,
Pascal Fouqué
(4)
,
Thierry Forveille
(6)
,
João Gomes da Silva
(9)
,
Katharine M. Hesse
(19)
,
Ágnes Kóspál
(20, 21, 22)
,
Hannah M. Lewis
(23)
,
C. F. Liu
(24)
,
J. H.C. Martins
(9)
,
Martin Paegert
(18)
,
Sara Seager
(19)
,
H. Shang
(24)
,
Joseph D. Twicken
(25, 26)
,
Thomas Vandal
(4)
,
Sandrine Vinatier
(27)
,
Thomas Widemann
(28, 27)
,
Joshua N. Winn
(29)
1
Pôle Planétologie du LESIA
2 IAP - Institut d'Astrophysique de Paris
3 OHP - Observatoire de Haute-Provence
4 iREX - Institut de Recherche sur les Exoplanètes
5 IRAP - Institut de recherche en astrophysique et planétologie
6 IPAG - Institut de Planétologie et d'Astrophysique de Grenoble
7 NExScI - NASA ExoPlanet Science Institute
8 Laboratorio Nacional de Astrofisica
9 IASTRO - Instituto de Astrofísica e Ciências do Espaço
10 ESO - European Southern Observatory
11 UHM - University of Hawai‘i [Mānoa]
12 Department of Astronomy and Astrophysics [UCSC Santa Cruz]
13 Department of Physics and Astronomy [Nashville]
14 CFHT - Canada-France-Hawaii Telescope Corporation
15 LAM - Laboratoire d'Astrophysique de Marseille
16 AMU - Aix Marseille Université
17 UFRN - Universidade Federal do Rio Grande do Norte [Natal]
18 CfA - Harvard-Smithsonian Center for Astrophysics
19 MIT Kavli Institute for Astrophysics and Space Research
20 Konkoly Observatory
21 MPIA - Max Planck Institute for Astronomy
22 ELTE - Eötvös Loránd University
23 STSci - Space Telescope Science Institute
24 IANCU - Institute of Astronomy [Taiwan]
25 ARC - NASA Ames Research Center
26 SETI Institute
27 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics
28 HELIOS - LATMOS
29 Department of Astrophysical Sciences [Princeton]
2 IAP - Institut d'Astrophysique de Paris
3 OHP - Observatoire de Haute-Provence
4 iREX - Institut de Recherche sur les Exoplanètes
5 IRAP - Institut de recherche en astrophysique et planétologie
6 IPAG - Institut de Planétologie et d'Astrophysique de Grenoble
7 NExScI - NASA ExoPlanet Science Institute
8 Laboratorio Nacional de Astrofisica
9 IASTRO - Instituto de Astrofísica e Ciências do Espaço
10 ESO - European Southern Observatory
11 UHM - University of Hawai‘i [Mānoa]
12 Department of Astronomy and Astrophysics [UCSC Santa Cruz]
13 Department of Physics and Astronomy [Nashville]
14 CFHT - Canada-France-Hawaii Telescope Corporation
15 LAM - Laboratoire d'Astrophysique de Marseille
16 AMU - Aix Marseille Université
17 UFRN - Universidade Federal do Rio Grande do Norte [Natal]
18 CfA - Harvard-Smithsonian Center for Astrophysics
19 MIT Kavli Institute for Astrophysics and Space Research
20 Konkoly Observatory
21 MPIA - Max Planck Institute for Astronomy
22 ELTE - Eötvös Loránd University
23 STSci - Space Telescope Science Institute
24 IANCU - Institute of Astronomy [Taiwan]
25 ARC - NASA Ames Research Center
26 SETI Institute
27 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics
28 HELIOS - LATMOS
29 Department of Astrophysical Sciences [Princeton]
Jean François Donati
- Fonction : Auteur
- PersonId : 739496
- IdHAL : jf-donati
- ORCID : 0000-0001-5541-2887
- IdRef : 076662276
Leandro de Almeida
- Fonction : Auteur
- PersonId : 1247429
- ORCID : 0000-0001-8179-1147
Isabelle Boisse
- Fonction : Auteur
- PersonId : 765531
- ORCID : 0000-0001-8388-8399
J. H.C. Martins
- Fonction : Auteur
- PersonId : 778391
- ORCID : 0000-0002-1532-9082
Sandrine Vinatier
- Fonction : Auteur
- PersonId : 740167
- IdHAL : sandrine-vinatier
- ORCID : 0000-0001-5541-2502
- IdRef : 119993503
Résumé
TOI-1695 is a V-mag = 13 M-dwarf star from the northern hemisphere at 45 pc from the Sun, around which a 3.134-day periodic transit signal from a super-Earth candidate was identified in TESS photometry. With a transit depth of 1.3 mmag, the radius of candidate TOI-1695.01 was estimated by the TESS pipeline to be 1.82 R with an equilibrium temperature of ~620 K. We successfully detected a reflex motion of the star and establish that it is due to a planetary companion at an orbital period consistent with the photometric transit period, thanks to a year-long radial-velocity monitoring of TOI-1695 by the SPIRou infrared spectropolarimeter. We used and compared different methods to reduce and analyze those data. We report a 5.5 detection of the planetary signal, giving a mass of 5.5±1.0 M and a radius of 2.03±0.18 R. We derive a mean equilibrium planet temperature of 590±90 K. The mean density of this small planet of 3.6±1.1 g cm3 is similar (1.7 lower) than that of the Earth. It leads to a nonnegligible fraction of volatiles in its atmosphere with fH,He = 0.280.23+0.46% or fwater = 23±12%. TOI-1695 b is a new sub-Neptune planet at the border of the M-dwarf radius valley that can help test formation scenarios for super-Earth and sub-Neptune-like planets.
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Licence : CC BY - Paternité
Licence : CC BY - Paternité