A sub-Neptune planet around TOI-1695 discovered and characterized with SPIRou and TESS

F. Kiefer; G. Hébrard; E. Martioli; E. Artigau; R. Doyon; J. F. Donati; C. Cadieux; A. Carmona; D. R. Ciardi; P. I. Cristofari; L. De Almeida; P. Figueira; E. Gaidos; E. Gonzales; A. Lecavelier Des Etangs; K. G. Stassun; L. Arnold; B. Benneke; I. Boisse; X. Bonfils; N. J. Cook; P. Cortés-Zuleta; X. Delfosse; J. Dias Do Nascimento; M. Fausnaugh; W. Fong; P. Fouqué; T. Forveille; J. Gomes Da Silva; K. Hesse; Kóspál; H. Lewis; C. F. Liu; J. H.C. Martins; M. Paegert; S. Seager; H. Shang; J. D. Twicken; T. Vandal; S. Vinatier; T. Widemann; J. N. Winn

doi:10.1051/0004-6361/202245129

A sub-Neptune planet around TOI-1695 discovered and characterized with SPIRou and TESS

F. Kiefer
, G. Hébrard
, E. Martioli
, E. Artigau
, R. Doyon
, J. F. Donati
, C. Cadieux
, A. Carmona
, D. R. Ciardi
, P. I. Cristofari
, L. De Almeida
, P. Figueira
, E. Gaidos
, E. Gonzales
, A. Lecavelier Des Etangs
, K. G. Stassun
, L. Arnold
, B. Benneke
, I. Boisse
, X. Bonfils

N. J. Cook, P. Cortés-Zuleta, X. Delfosse, J. Dias Do Nascimento, M. Fausnaugh, W. Fong, P. Fouqué, T. Forveille, J. Gomes Da Silva, K. Hesse, Kóspál, H. Lewis, C. F. Liu, J. H.C. Martins, M. Paegert, S. Seager, H. Shang, J. D. Twicken, T. Vandal, S. Vinatier, T. Widemann, J. N. Winn

Sorbonne Univ.
Institut d’Astrophysique de Paris
Observatoire de Haute-Provence
Laboratório Nacional de Astrofísica
Département de Physique
Institut de Recherche sur les Exoplanètes
IRAP/CNRS
Université Grenoble Alpes
GSFC Laboratory for Atmopsheres
Ipatimup Diagnósticos
European Southern Observatory Santiago
Department of Earth Sciences
University of Hawaii
Department of Astronomy and Astrophysics
University of California, Santa Cruz
Department of Physics and Astronomy
Vanderbilt University
CFHT
Aix-Marseille Univ.
LAM
The Federal University of Rio Grande do Norte
Center for Astrophysics | Harvard & Smithsonian
Department of Physics
Massachusetts Institute of Technology
Konkoly Observatory
Mta Centre of Excellence
Max-Planck-Institut für Astronomie
Institute of Physics
Eötvös Loránd University
Space Telescope Science Institute
Academia Sinica Institute of Astronomy and Astrophysics
Earth and Planetary Sciences
Massachusetts Institute of Technology
NASA Ames Research Center
SETI Institute
Université Paris-Saclay
Princeton University
Massachusetts Institute of Technology

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

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.

Original language	English
Article number	A136
Journal	Astronomy and Astrophysics
Volume	670
DOIs	https://doi.org/10.1051/0004-6361/202245129
Publication status	Published - 1 Feb 2023
Externally published	Yes

Keywords

Planets and satellites: detection
Planets and satellites: fundamental parameters
Planets and satellites: individual: TOI-1695 b
Techniques: photometric
Techniques: radial velocities

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10.1051/0004-6361/202245129

Cite this

Kiefer, F., Hébrard, G., Martioli, E., Artigau, E., Doyon, R., Donati, J. F., Cadieux, C., Carmona, A., Ciardi, D. R., Cristofari, P. I., De Almeida, L., Figueira, P., Gaidos, E., Gonzales, E., Lecavelier Des Etangs, A., Stassun, K. G., Arnold, L., Benneke, B., Boisse, I., ... Winn, J. N. (2023). A sub-Neptune planet around TOI-1695 discovered and characterized with SPIRou and TESS. Astronomy and Astrophysics, 670, Article A136. https://doi.org/10.1051/0004-6361/202245129

@article{b06b23f76b04483ab24f63ad5188dca9,

title = "A sub-Neptune planet around TOI-1695 discovered and characterized with SPIRou and TESS",

abstract = "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 \textasciitilde{}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.",

keywords = "Planets and satellites: detection, Planets and satellites: fundamental parameters, Planets and satellites: individual: TOI-1695 b, Techniques: photometric, Techniques: radial velocities",

author = "F. Kiefer and G. H{\'e}brard and E. Martioli and E. Artigau and R. Doyon and Donati, \{J. F.\} and C. Cadieux and A. Carmona and Ciardi, \{D. R.\} and Cristofari, \{P. I.\} and \{De Almeida\}, L. and P. Figueira and E. Gaidos and E. Gonzales and \{Lecavelier Des Etangs\}, A. and Stassun, \{K. G.\} and L. Arnold and B. Benneke and I. Boisse and X. Bonfils and Cook, \{N. J.\} and P. Cort{\'e}s-Zuleta and X. Delfosse and \{Do Nascimento\}, \{J. Dias\} and M. Fausnaugh and W. Fong and P. Fouqu{\'e} and T. Forveille and \{Gomes Da Silva\}, J. and K. Hesse and K{\'o}sp{\'a}l and H. Lewis and Liu, \{C. F.\} and Martins, \{J. H.C.\} and M. Paegert and S. Seager and H. Shang and Twicken, \{J. D.\} and T. Vandal and S. Vinatier and T. Widemann and Winn, \{J. N.\}",

note = "Publisher Copyright: {\textcopyright} 2023 The Authors.",

year = "2023",

month = feb,

day = "1",

doi = "10.1051/0004-6361/202245129",

language = "English",

volume = "670",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Kiefer, F, Hébrard, G, Martioli, E, Artigau, E, Doyon, R, Donati, JF, Cadieux, C, Carmona, A, Ciardi, DR, Cristofari, PI, De Almeida, L, Figueira, P, Gaidos, E, Gonzales, E, Lecavelier Des Etangs, A, Stassun, KG, Arnold, L, Benneke, B, Boisse, I, Bonfils, X, Cook, NJ, Cortés-Zuleta, P, Delfosse, X, Do Nascimento, JD, Fausnaugh, M, Fong, W, Fouqué, P, Forveille, T, Gomes Da Silva, J, Hesse, K, Kóspál, Lewis, H, Liu, CF, Martins, JHC, Paegert, M, Seager, S, Shang, H, Twicken, JD, Vandal, T, Vinatier, S, Widemann, T & Winn, JN 2023, 'A sub-Neptune planet around TOI-1695 discovered and characterized with SPIRou and TESS', Astronomy and Astrophysics, vol. 670, A136. https://doi.org/10.1051/0004-6361/202245129

TY - JOUR

T1 - A sub-Neptune planet around TOI-1695 discovered and characterized with SPIRou and TESS

AU - Kiefer, F.

AU - Hébrard, G.

AU - Martioli, E.

AU - Artigau, E.

AU - Doyon, R.

AU - Donati, J. F.

AU - Cadieux, C.

AU - Carmona, A.

AU - Ciardi, D. R.

AU - Cristofari, P. I.

AU - De Almeida, L.

AU - Figueira, P.

AU - Gaidos, E.

AU - Gonzales, E.

AU - Lecavelier Des Etangs, A.

AU - Stassun, K. G.

AU - Arnold, L.

AU - Benneke, B.

AU - Boisse, I.

AU - Bonfils, X.

AU - Cook, N. J.

AU - Cortés-Zuleta, P.

AU - Delfosse, X.

AU - Do Nascimento, J. Dias

AU - Fausnaugh, M.

AU - Fong, W.

AU - Fouqué, P.

AU - Forveille, T.

AU - Gomes Da Silva, J.

AU - Hesse, K.

AU - Kóspál,

AU - Lewis, H.

AU - Liu, C. F.

AU - Martins, J. H.C.

AU - Paegert, M.

AU - Seager, S.

AU - Shang, H.

AU - Twicken, J. D.

AU - Vandal, T.

AU - Vinatier, S.

AU - Widemann, T.

AU - Winn, J. N.

PY - 2023/2/1

Y1 - 2023/2/1

N2 - 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.

AB - 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.

KW - Planets and satellites: detection

KW - Planets and satellites: fundamental parameters

KW - Planets and satellites: individual: TOI-1695 b

KW - Techniques: photometric

KW - Techniques: radial velocities

U2 - 10.1051/0004-6361/202245129

DO - 10.1051/0004-6361/202245129

M3 - Article

AN - SCOPUS:85148668448

SN - 0004-6361

VL - 670

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A136

ER -

A sub-Neptune planet around TOI-1695 discovered and characterized with SPIRou and TESS

Abstract

Keywords

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