TOI-4860 b, a short-period giant planet transiting an M3.5 dwarf

J. M. Almenara; X. Bonfils; E. M. Bryant; A. Jordán; G. Hébrard; E. Martioli; A. C.M. Correia; N. Astudillo-Defru; C. Cadieux; L. Arnold; Artigau; G. Bakos; S. C.C. Barros; D. Bayliss; F. Bouchy; G. Boué; R. Brahm; A. Carmona; D. Charbonneau; D. R. Ciardi; R. Cloutier; M. Cointepas; N. J. Cook; N. B. Cowan; X. Delfosse; J. Dias Do Nascimento; J. F. Donati; R. Doyon; T. Forveille; P. Fouqué; E. Gaidos; E. A. Gilbert; J. Gomes Da Silva; J. D. Hartman; K. Hesse; M. J. Hobson; J. M. Jenkins; F. Kiefer; V. B. Kostov; J. Laskar; M. Lendl; A. L'Heureux; J. H.C. Martins; K. Menou; C. Moutou; F. Murgas; A. S. Polanski; D. Rapetti; E. Sedaghati; H. Shang

doi:10.1051/0004-6361/202346999

TOI-4860 b, a short-period giant planet transiting an M3.5 dwarf

J. M. Almenara, X. Bonfils, E. M. Bryant, A. Jordán, G. Hébrard, E. Martioli, A. C.M. Correia, N. Astudillo-Defru, C. Cadieux, L. Arnold, Artigau, G. Bakos, S. C.C. Barros, D. Bayliss, F. Bouchy, G. Boué, R. Brahm, A. Carmona, D. Charbonneau, D. R. CiardiR. Cloutier, M. Cointepas, N. J. Cook, N. B. Cowan, X. Delfosse, J. Dias Do Nascimento, J. F. Donati, R. Doyon, T. Forveille, P. Fouqué, E. Gaidos, E. A. Gilbert, J. Gomes Da Silva, J. D. Hartman, K. Hesse, M. J. Hobson, J. M. Jenkins, F. Kiefer, V. B. Kostov, J. Laskar, M. Lendl, A. L'Heureux, J. H.C. Martins, K. Menou, C. Moutou, F. Murgas, A. S. Polanski, D. Rapetti, E. Sedaghati, H. Shang

Astrophysical Sciences

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Abstract

We report the discovery and characterisation of a giant transiting planet orbiting a nearby M3.5V dwarf (d = 80.4pc, G = 15.1 mag, K=11.2mag, R_∗ = 0.358 ± 0.015 R, M_∗ = 0.340 ± 0.009 M). Using the photometric time series from TESS sectors 10, 36, 46, and 63 and near-infrared spectrophotometry from ExTrA, we measured a planetary radius of 0.77 ± 0.03 R_J and an orbital period of 1.52 days. With high-resolution spectroscopy taken by the CFHT/SPIRou and ESO/ESPRESSO spectrographs, we refined the host star parameters ([Fe/H] = 0.27 ± 0.12) and measured the mass of the planet (0.273 ± 0.006 M_J). Based on these measurements, TOI-4860 b joins the small set of massive planets (>80 M_E) found around mid to late M dwarfs (<0.4 R), providing both an interesting challenge to planet formation theory and a favourable target for further atmospheric studies with transmission spectroscopy. We identified an additional signal in the radial velocity data that we attribute to an eccentric planet candidate (e = 0.66 ± 0.09) with an orbital period of 427 ± 7 days and a minimum mass of 1.66 ± 0.26 M_J, but additional data would be needed to confirm this.

Original language	English (US)
Article number	A166
Journal	Astronomy and Astrophysics
Volume	683
DOIs	https://doi.org/10.1051/0004-6361/202346999
State	Published - Mar 1 2024

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Planetary systems
Stars: individual: TOI-4860
Stars: low-mass
Techniques: photometric
Techniques: radial velocities

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10.1051/0004-6361/202346999

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Almenara, J. M., Bonfils, X., Bryant, E. M., Jordán, A., Hébrard, G., Martioli, E., Correia, A. C. M., Astudillo-Defru, N., Cadieux, C., Arnold, L., Artigau, Bakos, G., Barros, S. C. C., Bayliss, D., Bouchy, F., Boué, G., Brahm, R., Carmona, A., Charbonneau, D., ... Shang, H. (2024). TOI-4860 b, a short-period giant planet transiting an M3.5 dwarf. Astronomy and Astrophysics, 683, Article A166. https://doi.org/10.1051/0004-6361/202346999

@article{0490ca62567b4744b62c35f50366e8ae,

title = "TOI-4860 b, a short-period giant planet transiting an M3.5 dwarf",

abstract = "We report the discovery and characterisation of a giant transiting planet orbiting a nearby M3.5V dwarf (d = 80.4pc, G = 15.1 mag, K=11.2mag, R∗ = 0.358 ± 0.015 R, M∗ = 0.340 ± 0.009 M). Using the photometric time series from TESS sectors 10, 36, 46, and 63 and near-infrared spectrophotometry from ExTrA, we measured a planetary radius of 0.77 ± 0.03 RJ and an orbital period of 1.52 days. With high-resolution spectroscopy taken by the CFHT/SPIRou and ESO/ESPRESSO spectrographs, we refined the host star parameters ([Fe/H] = 0.27 ± 0.12) and measured the mass of the planet (0.273 ± 0.006 MJ). Based on these measurements, TOI-4860 b joins the small set of massive planets (>80 ME) found around mid to late M dwarfs (<0.4 R), providing both an interesting challenge to planet formation theory and a favourable target for further atmospheric studies with transmission spectroscopy. We identified an additional signal in the radial velocity data that we attribute to an eccentric planet candidate (e = 0.66 ± 0.09) with an orbital period of 427 ± 7 days and a minimum mass of 1.66 ± 0.26 MJ, but additional data would be needed to confirm this.",

keywords = "Planetary systems, Stars: individual: TOI-4860, Stars: low-mass, Techniques: photometric, Techniques: radial velocities",

author = "Almenara, {J. M.} and X. Bonfils and Bryant, {E. M.} and A. Jord{\'a}n and G. H{\'e}brard and E. Martioli and Correia, {A. C.M.} and N. Astudillo-Defru and C. Cadieux and L. Arnold and Artigau and G. Bakos and Barros, {S. C.C.} and D. Bayliss and F. Bouchy and G. Bou{\'e} and R. Brahm and A. Carmona and D. Charbonneau and Ciardi, {D. R.} and R. Cloutier and M. Cointepas and Cook, {N. J.} and Cowan, {N. B.} and X. Delfosse and {Dias Do Nascimento}, J. and Donati, {J. F.} and R. Doyon and T. Forveille and P. Fouqu{\'e} and E. Gaidos and Gilbert, {E. A.} and {Da Silva}, {J. Gomes} and Hartman, {J. D.} and K. Hesse and Hobson, {M. J.} and Jenkins, {J. M.} and F. Kiefer and Kostov, {V. B.} and J. Laskar and M. Lendl and A. L'Heureux and Martins, {J. H.C.} and K. Menou and C. Moutou and F. Murgas and Polanski, {A. S.} and D. Rapetti and E. Sedaghati and H. Shang",

year = "2024",

month = mar,

day = "1",

doi = "10.1051/0004-6361/202346999",

language = "English (US)",

volume = "683",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Almenara, JM, Bonfils, X, Bryant, EM, Jordán, A, Hébrard, G, Martioli, E, Correia, ACM, Astudillo-Defru, N, Cadieux, C, Arnold, L, Artigau, , Bakos, G, Barros, SCC, Bayliss, D, Bouchy, F, Boué, G, Brahm, R, Carmona, A, Charbonneau, D, Ciardi, DR, Cloutier, R, Cointepas, M, Cook, NJ, Cowan, NB, Delfosse, X, Dias Do Nascimento, J, Donati, JF, Doyon, R, Forveille, T, Fouqué, P, Gaidos, E, Gilbert, EA, Da Silva, JG, Hartman, JD, Hesse, K, Hobson, MJ, Jenkins, JM, Kiefer, F, Kostov, VB, Laskar, J, Lendl, M, L'Heureux, A, Martins, JHC, Menou, K, Moutou, C, Murgas, F, Polanski, AS, Rapetti, D, Sedaghati, E & Shang, H 2024, 'TOI-4860 b, a short-period giant planet transiting an M3.5 dwarf', Astronomy and Astrophysics, vol. 683, A166. https://doi.org/10.1051/0004-6361/202346999

TY - JOUR

T1 - TOI-4860 b, a short-period giant planet transiting an M3.5 dwarf

AU - Almenara, J. M.

AU - Bonfils, X.

AU - Bryant, E. M.

AU - Jordán, A.

AU - Hébrard, G.

AU - Martioli, E.

AU - Correia, A. C.M.

AU - Astudillo-Defru, N.

AU - Cadieux, C.

AU - Arnold, L.

AU - Artigau,

AU - Bakos, G.

AU - Barros, S. C.C.

AU - Bayliss, D.

AU - Bouchy, F.

AU - Boué, G.

AU - Brahm, R.

AU - Carmona, A.

AU - Charbonneau, D.

AU - Ciardi, D. R.

AU - Cloutier, R.

AU - Cointepas, M.

AU - Cook, N. J.

AU - Cowan, N. B.

AU - Delfosse, X.

AU - Dias Do Nascimento, J.

AU - Donati, J. F.

AU - Doyon, R.

AU - Forveille, T.

AU - Fouqué, P.

AU - Gaidos, E.

AU - Gilbert, E. A.

AU - Da Silva, J. Gomes

AU - Hartman, J. D.

AU - Hesse, K.

AU - Hobson, M. J.

AU - Jenkins, J. M.

AU - Kiefer, F.

AU - Kostov, V. B.

AU - Laskar, J.

AU - Lendl, M.

AU - L'Heureux, A.

AU - Martins, J. H.C.

AU - Menou, K.

AU - Moutou, C.

AU - Murgas, F.

AU - Polanski, A. S.

AU - Rapetti, D.

AU - Sedaghati, E.

AU - Shang, H.

PY - 2024/3/1

Y1 - 2024/3/1

N2 - We report the discovery and characterisation of a giant transiting planet orbiting a nearby M3.5V dwarf (d = 80.4pc, G = 15.1 mag, K=11.2mag, R∗ = 0.358 ± 0.015 R, M∗ = 0.340 ± 0.009 M). Using the photometric time series from TESS sectors 10, 36, 46, and 63 and near-infrared spectrophotometry from ExTrA, we measured a planetary radius of 0.77 ± 0.03 RJ and an orbital period of 1.52 days. With high-resolution spectroscopy taken by the CFHT/SPIRou and ESO/ESPRESSO spectrographs, we refined the host star parameters ([Fe/H] = 0.27 ± 0.12) and measured the mass of the planet (0.273 ± 0.006 MJ). Based on these measurements, TOI-4860 b joins the small set of massive planets (>80 ME) found around mid to late M dwarfs (<0.4 R), providing both an interesting challenge to planet formation theory and a favourable target for further atmospheric studies with transmission spectroscopy. We identified an additional signal in the radial velocity data that we attribute to an eccentric planet candidate (e = 0.66 ± 0.09) with an orbital period of 427 ± 7 days and a minimum mass of 1.66 ± 0.26 MJ, but additional data would be needed to confirm this.

AB - We report the discovery and characterisation of a giant transiting planet orbiting a nearby M3.5V dwarf (d = 80.4pc, G = 15.1 mag, K=11.2mag, R∗ = 0.358 ± 0.015 R, M∗ = 0.340 ± 0.009 M). Using the photometric time series from TESS sectors 10, 36, 46, and 63 and near-infrared spectrophotometry from ExTrA, we measured a planetary radius of 0.77 ± 0.03 RJ and an orbital period of 1.52 days. With high-resolution spectroscopy taken by the CFHT/SPIRou and ESO/ESPRESSO spectrographs, we refined the host star parameters ([Fe/H] = 0.27 ± 0.12) and measured the mass of the planet (0.273 ± 0.006 MJ). Based on these measurements, TOI-4860 b joins the small set of massive planets (>80 ME) found around mid to late M dwarfs (<0.4 R), providing both an interesting challenge to planet formation theory and a favourable target for further atmospheric studies with transmission spectroscopy. We identified an additional signal in the radial velocity data that we attribute to an eccentric planet candidate (e = 0.66 ± 0.09) with an orbital period of 427 ± 7 days and a minimum mass of 1.66 ± 0.26 MJ, but additional data would be needed to confirm this.

KW - Planetary systems

KW - Stars: individual: TOI-4860

KW - Stars: low-mass

KW - Techniques: photometric

KW - Techniques: radial velocities

UR - http://www.scopus.com/inward/record.url?scp=85188270545&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85188270545&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/202346999

DO - 10.1051/0004-6361/202346999

M3 - Article

AN - SCOPUS:85188270545

SN - 0004-6361

VL - 683

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A166

ER -

TOI-4860 b, a short-period giant planet transiting an M3.5 dwarf

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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