TOI-1201 b: A mini-Neptune transiting a bright and moderately young M dwarf

D. Kossakowski; J. Kemmer; P. Bluhm; S. Stock; J. A. Caballero; V. J.S. Béjar; C. Cardona Guillén; N. Lodieu; K. A. Collins; M. Oshagh; M. Schlecker; N. Espinoza; E. Pallé; Th Henning; L. Kreidberg; M. Kürster; P. J. Amado; D. R. Anderson; J. C. Morales; S. Cartwright; D. Charbonneau; P. Chaturvedi; C. Cifuentes; D. M. Conti; M. Cortés-Contreras; S. Dreizler; D. Galadí-Enríquez; P. Guerra; R. Hart; C. Hellier; C. Henze; E. Herrero; S. V. Jeffers; J. M. Jenkins; E. L.N. Jensen; A. Kaminski; J. F. Kielkopf; M. Kunimoto; M. Lafarga; D. W. Latham; J. Lillo-Box; R. Luque; K. Molaverdikhani; D. Montes; G. Morello; E. H. Morgan; G. Nowak; A. Pavlov; M. Perger; E. V. Quintana; A. Quirrenbach; S. Reffert; A. Reiners; G. Ricker; I. Ribas; C. Rodríguez López; M. R.Zapatero Osorio; S. Seager; P. Schöfer; A. Schweitzer; T. Trifonov; S. Vanaverbeke; R. Vanderspek; R. West; J. Winn; M. Zechmeister

doi:10.1051/0004-6361/202141587

TOI-1201 b: A mini-Neptune transiting a bright and moderately young M dwarf

D. Kossakowski, J. Kemmer, P. Bluhm, S. Stock, J. A. Caballero, V. J.S. Béjar, C. Cardona Guillén, N. Lodieu, K. A. Collins, M. Oshagh, M. Schlecker, N. Espinoza, E. Pallé, Th Henning, L. Kreidberg, M. Kürster, P. J. Amado, D. R. Anderson, J. C. Morales, S. CartwrightD. Charbonneau, P. Chaturvedi, C. Cifuentes, D. M. Conti, M. Cortés-Contreras, S. Dreizler, D. Galadí-Enríquez, P. Guerra, R. Hart, C. Hellier, C. Henze, E. Herrero, S. V. Jeffers, J. M. Jenkins, E. L.N. Jensen, A. Kaminski, J. F. Kielkopf, M. Kunimoto, M. Lafarga, D. W. Latham, J. Lillo-Box, R. Luque, K. Molaverdikhani, D. Montes, G. Morello, E. H. Morgan, G. Nowak, A. Pavlov, M. Perger, E. V. Quintana, A. Quirrenbach, S. Reffert, A. Reiners, G. Ricker, I. Ribas, C. Rodríguez López, M. R.Zapatero Osorio, S. Seager, P. Schöfer, A. Schweitzer, T. Trifonov, S. Vanaverbeke, R. Vanderspek, R. West, J. Winn, M. Zechmeister

Astrophysical Sciences

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Abstract

We present the discovery of a transiting mini-Neptune around TOI-1201, a relatively bright and moderately young early M dwarf (J ≈ 9.5 mag, ~600-800 Myr) in an equal-mass ~8 arcsecond-wide binary system, using data from the Transiting Exoplanet Survey Satellite, along with follow-up transit observations. With an orbital period of 2.49 d, TOI-1201 b is a warm mini-Neptune with a radius of Rb = 2.415 ± 0.090 R⊕. This signal is also present in the precise radial velocity measurements from CARMENES, confirming the existence of the planet and providing a planetary mass of Mb = 6.28 ± 0.88 M⊕ and, thus, an estimated bulk density of 2.45-0.42+0.48 g cm-3. The spectroscopic observations additionally show evidence of a signal with a period of 19 d and a long periodic variation of undetermined origin. In combination with ground-based photometric monitoring from WASP-South and ASAS-SN, we attribute the 19 d signal to the stellar rotation period (Prot = 19-23 d), although we cannot rule out that the variation seen in photometry belongs to the visually close binary companion. We calculate precise stellar parameters for both TOI-1201 and its companion. The transiting planet is anexcellent target for atmosphere characterization (the transmission spectroscopy metric is 97-16+21) with the upcoming James Webb Space Telescope. It is also feasible to measure its spin-orbit alignment via the Rossiter-McLaughlin effect using current state-of-the-art spectrographs with submeter per second radial velocity precision.

Original language	English (US)
Article number	A124
Journal	Astronomy and Astrophysics
Volume	656
DOIs	https://doi.org/10.1051/0004-6361/202141587
State	Published - 2021

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Planetary systems
Stars: individual: TIC-29 960 110
Stars: individual: TOI-1201
Stars: low-mass
Techniques: photometric
Techniques: radial velocities

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Kossakowski, D., Kemmer, J., Bluhm, P., Stock, S., Caballero, J. A., Béjar, V. J. S., Guillén, C. C., Lodieu, N., Collins, K. A., Oshagh, M., Schlecker, M., Espinoza, N., Pallé, E., Henning, T., Kreidberg, L., Kürster, M., Amado, P. J., Anderson, D. R., Morales, J. C., ... Zechmeister, M. (2021). TOI-1201 b: A mini-Neptune transiting a bright and moderately young M dwarf. Astronomy and Astrophysics, 656, Article A124. https://doi.org/10.1051/0004-6361/202141587

@article{9b53b871428c49179e71b7b83b8ba2f5,

title = "TOI-1201 b: A mini-Neptune transiting a bright and moderately young M dwarf",

abstract = "We present the discovery of a transiting mini-Neptune around TOI-1201, a relatively bright and moderately young early M dwarf (J ≈ 9.5 mag, ~600-800 Myr) in an equal-mass ~8 arcsecond-wide binary system, using data from the Transiting Exoplanet Survey Satellite, along with follow-up transit observations. With an orbital period of 2.49 d, TOI-1201 b is a warm mini-Neptune with a radius of Rb = 2.415 ± 0.090 R⊕. This signal is also present in the precise radial velocity measurements from CARMENES, confirming the existence of the planet and providing a planetary mass of Mb = 6.28 ± 0.88 M⊕ and, thus, an estimated bulk density of 2.45-0.42+0.48 g cm-3. The spectroscopic observations additionally show evidence of a signal with a period of 19 d and a long periodic variation of undetermined origin. In combination with ground-based photometric monitoring from WASP-South and ASAS-SN, we attribute the 19 d signal to the stellar rotation period (Prot = 19-23 d), although we cannot rule out that the variation seen in photometry belongs to the visually close binary companion. We calculate precise stellar parameters for both TOI-1201 and its companion. The transiting planet is anexcellent target for atmosphere characterization (the transmission spectroscopy metric is 97-16+21) with the upcoming James Webb Space Telescope. It is also feasible to measure its spin-orbit alignment via the Rossiter-McLaughlin effect using current state-of-the-art spectrographs with submeter per second radial velocity precision.",

keywords = "Planetary systems, Stars: individual: TIC-29 960 110, Stars: individual: TOI-1201, Stars: low-mass, Techniques: photometric, Techniques: radial velocities",

author = "D. Kossakowski and J. Kemmer and P. Bluhm and S. Stock and Caballero, {J. A.} and B{\'e}jar, {V. J.S.} and Guill{\'e}n, {C. Cardona} and N. Lodieu and Collins, {K. A.} and M. Oshagh and M. Schlecker and N. Espinoza and E. Pall{\'e} and Th Henning and L. Kreidberg and M. K{\"u}rster and Amado, {P. J.} and Anderson, {D. R.} and Morales, {J. C.} and S. Cartwright and D. Charbonneau and P. Chaturvedi and C. Cifuentes and Conti, {D. M.} and M. Cort{\'e}s-Contreras and S. Dreizler and D. Galad{\'i}-Enr{\'i}quez and P. Guerra and R. Hart and C. Hellier and C. Henze and E. Herrero and Jeffers, {S. V.} and Jenkins, {J. M.} and Jensen, {E. L.N.} and A. Kaminski and Kielkopf, {J. F.} and M. Kunimoto and M. Lafarga and Latham, {D. W.} and J. Lillo-Box and R. Luque and K. Molaverdikhani and D. Montes and G. Morello and Morgan, {E. H.} and G. Nowak and A. Pavlov and M. Perger and Quintana, {E. V.} and A. Quirrenbach and S. Reffert and A. Reiners and G. Ricker and I. Ribas and L{\'o}pez, {C. Rodr{\'i}guez} and Osorio, {M. R.Zapatero} and S. Seager and P. Sch{\"o}fer and A. Schweitzer and T. Trifonov and S. Vanaverbeke and R. Vanderspek and R. West and J. Winn and M. Zechmeister",

note = "Publisher Copyright: {\textcopyright} D. Kossakowski et al. 2021.",

year = "2021",

doi = "10.1051/0004-6361/202141587",

language = "English (US)",

volume = "656",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Kossakowski, D, Kemmer, J, Bluhm, P, Stock, S, Caballero, JA, Béjar, VJS, Guillén, CC, Lodieu, N, Collins, KA, Oshagh, M, Schlecker, M, Espinoza, N, Pallé, E, Henning, T, Kreidberg, L, Kürster, M, Amado, PJ, Anderson, DR, Morales, JC, Cartwright, S, Charbonneau, D, Chaturvedi, P, Cifuentes, C, Conti, DM, Cortés-Contreras, M, Dreizler, S, Galadí-Enríquez, D, Guerra, P, Hart, R, Hellier, C, Henze, C, Herrero, E, Jeffers, SV, Jenkins, JM, Jensen, ELN, Kaminski, A, Kielkopf, JF, Kunimoto, M, Lafarga, M, Latham, DW, Lillo-Box, J, Luque, R, Molaverdikhani, K, Montes, D, Morello, G, Morgan, EH, Nowak, G, Pavlov, A, Perger, M, Quintana, EV, Quirrenbach, A, Reffert, S, Reiners, A, Ricker, G, Ribas, I, López, CR, Osorio, MRZ, Seager, S, Schöfer, P, Schweitzer, A, Trifonov, T, Vanaverbeke, S, Vanderspek, R, West, R, Winn, J & Zechmeister, M 2021, 'TOI-1201 b: A mini-Neptune transiting a bright and moderately young M dwarf', Astronomy and Astrophysics, vol. 656, A124. https://doi.org/10.1051/0004-6361/202141587

TY - JOUR

T1 - TOI-1201 b

T2 - A mini-Neptune transiting a bright and moderately young M dwarf

AU - Kossakowski, D.

AU - Kemmer, J.

AU - Bluhm, P.

AU - Stock, S.

AU - Caballero, J. A.

AU - Béjar, V. J.S.

AU - Guillén, C. Cardona

AU - Lodieu, N.

AU - Collins, K. A.

AU - Oshagh, M.

AU - Schlecker, M.

AU - Espinoza, N.

AU - Pallé, E.

AU - Henning, Th

AU - Kreidberg, L.

AU - Kürster, M.

AU - Amado, P. J.

AU - Anderson, D. R.

AU - Morales, J. C.

AU - Cartwright, S.

AU - Charbonneau, D.

AU - Chaturvedi, P.

AU - Cifuentes, C.

AU - Conti, D. M.

AU - Cortés-Contreras, M.

AU - Dreizler, S.

AU - Galadí-Enríquez, D.

AU - Guerra, P.

AU - Hart, R.

AU - Hellier, C.

AU - Henze, C.

AU - Herrero, E.

AU - Jeffers, S. V.

AU - Jenkins, J. M.

AU - Jensen, E. L.N.

AU - Kaminski, A.

AU - Kielkopf, J. F.

AU - Kunimoto, M.

AU - Lafarga, M.

AU - Latham, D. W.

AU - Lillo-Box, J.

AU - Luque, R.

AU - Molaverdikhani, K.

AU - Montes, D.

AU - Morello, G.

AU - Morgan, E. H.

AU - Nowak, G.

AU - Pavlov, A.

AU - Perger, M.

AU - Quintana, E. V.

AU - Quirrenbach, A.

AU - Reffert, S.

AU - Reiners, A.

AU - Ricker, G.

AU - Ribas, I.

AU - López, C. Rodríguez

AU - Osorio, M. R.Zapatero

AU - Seager, S.

AU - Schöfer, P.

AU - Schweitzer, A.

AU - Trifonov, T.

AU - Vanaverbeke, S.

AU - Vanderspek, R.

AU - West, R.

AU - Winn, J.

AU - Zechmeister, M.

PY - 2021

Y1 - 2021

N2 - We present the discovery of a transiting mini-Neptune around TOI-1201, a relatively bright and moderately young early M dwarf (J ≈ 9.5 mag, ~600-800 Myr) in an equal-mass ~8 arcsecond-wide binary system, using data from the Transiting Exoplanet Survey Satellite, along with follow-up transit observations. With an orbital period of 2.49 d, TOI-1201 b is a warm mini-Neptune with a radius of Rb = 2.415 ± 0.090 R⊕. This signal is also present in the precise radial velocity measurements from CARMENES, confirming the existence of the planet and providing a planetary mass of Mb = 6.28 ± 0.88 M⊕ and, thus, an estimated bulk density of 2.45-0.42+0.48 g cm-3. The spectroscopic observations additionally show evidence of a signal with a period of 19 d and a long periodic variation of undetermined origin. In combination with ground-based photometric monitoring from WASP-South and ASAS-SN, we attribute the 19 d signal to the stellar rotation period (Prot = 19-23 d), although we cannot rule out that the variation seen in photometry belongs to the visually close binary companion. We calculate precise stellar parameters for both TOI-1201 and its companion. The transiting planet is anexcellent target for atmosphere characterization (the transmission spectroscopy metric is 97-16+21) with the upcoming James Webb Space Telescope. It is also feasible to measure its spin-orbit alignment via the Rossiter-McLaughlin effect using current state-of-the-art spectrographs with submeter per second radial velocity precision.

AB - We present the discovery of a transiting mini-Neptune around TOI-1201, a relatively bright and moderately young early M dwarf (J ≈ 9.5 mag, ~600-800 Myr) in an equal-mass ~8 arcsecond-wide binary system, using data from the Transiting Exoplanet Survey Satellite, along with follow-up transit observations. With an orbital period of 2.49 d, TOI-1201 b is a warm mini-Neptune with a radius of Rb = 2.415 ± 0.090 R⊕. This signal is also present in the precise radial velocity measurements from CARMENES, confirming the existence of the planet and providing a planetary mass of Mb = 6.28 ± 0.88 M⊕ and, thus, an estimated bulk density of 2.45-0.42+0.48 g cm-3. The spectroscopic observations additionally show evidence of a signal with a period of 19 d and a long periodic variation of undetermined origin. In combination with ground-based photometric monitoring from WASP-South and ASAS-SN, we attribute the 19 d signal to the stellar rotation period (Prot = 19-23 d), although we cannot rule out that the variation seen in photometry belongs to the visually close binary companion. We calculate precise stellar parameters for both TOI-1201 and its companion. The transiting planet is anexcellent target for atmosphere characterization (the transmission spectroscopy metric is 97-16+21) with the upcoming James Webb Space Telescope. It is also feasible to measure its spin-orbit alignment via the Rossiter-McLaughlin effect using current state-of-the-art spectrographs with submeter per second radial velocity precision.

KW - Planetary systems

KW - Stars: individual: TIC-29 960 110

KW - Stars: individual: TOI-1201

KW - Stars: low-mass

KW - Techniques: photometric

KW - Techniques: radial velocities

UR - http://www.scopus.com/inward/record.url?scp=85121207792&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85121207792&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/202141587

DO - 10.1051/0004-6361/202141587

M3 - Article

AN - SCOPUS:85121207792

SN - 0004-6361

VL - 656

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A124

ER -

TOI-1201 b: A mini-Neptune transiting a bright and moderately young M dwarf

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