TOI-1199 b and TOI-1273 b: Two new transiting hot Saturns detected and characterized with SOPHIE and TESS

J. Serrano Bell; R. F. Díaz; G. Hébrard; E. Martioli; N. Heidari; S. Sousa; I. Boisse; J. M. Almenara; J. Alonso-Santiago; S. C.C. Barros; P. Benni; A. Bieryla; X. Bonfils; D. A. Caldwell; D. R. Ciardi; K. A. Collins; P. Cortés-Zuleta; S. Dalal; J. P. De León; M. Deleuil; X. Delfosse; O. D.S. Demangeon; E. Esparza-Borges; T. Forveille; A. Frasca; A. Fukui; J. Gregorio; N. M. Guerrero; S. B. Howell; S. Hoyer; K. Ikuta; J. M. Jenkins; F. Kiefer; D. W. Latham; G. Marino; E. J. Michaels; C. Moutou; F. Murgas; N. Narita; E. Palle; H. Parviainen; N. C. Santos; K. G. Stassun; J. N. Winn

doi:10.1051/0004-6361/202348288

TOI-1199 b and TOI-1273 b: Two new transiting hot Saturns detected and characterized with SOPHIE and TESS

J. Serrano Bell
, R. F. Díaz
, G. Hébrard
, E. Martioli
, N. Heidari
, S. Sousa
, I. Boisse
, J. M. Almenara
, J. Alonso-Santiago
, S. C.C. Barros
, P. Benni
, A. Bieryla
, X. Bonfils
, D. A. Caldwell
, D. R. Ciardi
, K. A. Collins
, P. Cortés-Zuleta
, S. Dalal
, J. P. De León
, M. Deleuil

X. Delfosse, O. D.S. Demangeon, E. Esparza-Borges, T. Forveille, A. Frasca, A. Fukui, J. Gregorio, N. M. Guerrero, S. B. Howell, S. Hoyer, K. Ikuta, J. M. Jenkins, F. Kiefer, D. W. Latham, G. Marino, E. J. Michaels, C. Moutou, F. Murgas, N. Narita, E. Palle, H. Parviainen, N. C. Santos, K. G. Stassun, J. N. Winn

Astrophysical Sciences

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

2 Scopus citations

Abstract

We report the characterization of two planet candidates detected by the Transiting Exoplanet Survey Satellite (TESS), TOI-1199 b and TOI-1273 b, with periods of 3.7 and 4.6 days, respectively. Follow-up observations for both targets, which include several ground-based light curves, confirmed the transit events. High-precision radial velocities from the SOPHIE spectrograph revealed signals at the expected frequencies and phases of the transiting candidates and allowed mass determinations with a precision of 8.4% and 6.7% for TOI-1199 b and TOI-1273 b, respectively. The planetary and orbital parameters were derived from a joint analysis of the radial velocities and photometric data. We find that the planets have masses of 0.239 ± 0.020 M_J and 0.222 ± 0.015 M_J and radii of 0.938 ± 0.025 R_J and 0.99 ± 0.22 R_J, respectively. The grazing transit of TOI-1273 b translates to a larger uncertainty in its radius, and hence also in its bulk density, compared to TOI-1199 b. The inferred bulk densities of 0.358 ± 0.041 g cm^-3 and 0.28 ± 0.11 g cm^-3 are among the lowest known for exoplanets in this mass range, which, considering the brightness of the host stars (V≈11 mag), render them particularly amenable to atmospheric characterization via the transit spectroscopy technique. The better constraints on the parameters of TOI-1199 b provide a transmission spectroscopy metric of 134 ± 17, making it the better suited of the two planets for atmospheric studies.

Original language	English (US)
Article number	A6
Journal	Astronomy and Astrophysics
Volume	684
DOIs	https://doi.org/10.1051/0004-6361/202348288
State	Published - Apr 1 2024

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

planetary systems
planets and satellites: detection
planets and satellites: gaseous planets
techniques: photometric
techniques: radial velocities

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10.1051/0004-6361/202348288

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Serrano Bell, J., Díaz, R. F., Hébrard, G., Martioli, E., Heidari, N., Sousa, S., Boisse, I., Almenara, J. M., Alonso-Santiago, J., Barros, S. C. C., Benni, P., Bieryla, A., Bonfils, X., Caldwell, D. A., Ciardi, D. R., Collins, K. A., Cortés-Zuleta, P., Dalal, S., De León, J. P., ... Winn, J. N. (2024). TOI-1199 b and TOI-1273 b: Two new transiting hot Saturns detected and characterized with SOPHIE and TESS. Astronomy and Astrophysics, 684, Article A6. https://doi.org/10.1051/0004-6361/202348288

@article{52a8f2dae3474c2299cca281091badf4,

title = "TOI-1199 b and TOI-1273 b: Two new transiting hot Saturns detected and characterized with SOPHIE and TESS",

abstract = "We report the characterization of two planet candidates detected by the Transiting Exoplanet Survey Satellite (TESS), TOI-1199 b and TOI-1273 b, with periods of 3.7 and 4.6 days, respectively. Follow-up observations for both targets, which include several ground-based light curves, confirmed the transit events. High-precision radial velocities from the SOPHIE spectrograph revealed signals at the expected frequencies and phases of the transiting candidates and allowed mass determinations with a precision of 8.4\% and 6.7\% for TOI-1199 b and TOI-1273 b, respectively. The planetary and orbital parameters were derived from a joint analysis of the radial velocities and photometric data. We find that the planets have masses of 0.239 ± 0.020 MJ and 0.222 ± 0.015 MJ and radii of 0.938 ± 0.025 RJ and 0.99 ± 0.22 RJ, respectively. The grazing transit of TOI-1273 b translates to a larger uncertainty in its radius, and hence also in its bulk density, compared to TOI-1199 b. The inferred bulk densities of 0.358 ± 0.041 g cm-3 and 0.28 ± 0.11 g cm-3 are among the lowest known for exoplanets in this mass range, which, considering the brightness of the host stars (V≈11 mag), render them particularly amenable to atmospheric characterization via the transit spectroscopy technique. The better constraints on the parameters of TOI-1199 b provide a transmission spectroscopy metric of 134 ± 17, making it the better suited of the two planets for atmospheric studies.",

keywords = "planetary systems, planets and satellites: detection, planets and satellites: gaseous planets, techniques: photometric, techniques: radial velocities",

author = "\{Serrano Bell\}, J. and D{\'i}az, \{R. F.\} and G. H{\'e}brard and E. Martioli and N. Heidari and S. Sousa and I. Boisse and Almenara, \{J. M.\} and J. Alonso-Santiago and Barros, \{S. C.C.\} and P. Benni and A. Bieryla and X. Bonfils and Caldwell, \{D. A.\} and Ciardi, \{D. R.\} and Collins, \{K. A.\} and P. Cort{\'e}s-Zuleta and S. Dalal and \{De Le{\'o}n\}, \{J. P.\} and M. Deleuil and X. Delfosse and Demangeon, \{O. D.S.\} and E. Esparza-Borges and T. Forveille and A. Frasca and A. Fukui and J. Gregorio and Guerrero, \{N. M.\} and Howell, \{S. B.\} and S. Hoyer and K. Ikuta and Jenkins, \{J. M.\} and F. Kiefer and Latham, \{D. W.\} and G. Marino and Michaels, \{E. J.\} and C. Moutou and F. Murgas and N. Narita and E. Palle and H. Parviainen and Santos, \{N. C.\} and Stassun, \{K. G.\} and Winn, \{J. N.\}",

note = "Publisher Copyright: {\textcopyright} The Authors 2024.",

year = "2024",

month = apr,

day = "1",

doi = "10.1051/0004-6361/202348288",

language = "English (US)",

volume = "684",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Serrano Bell, J, Díaz, RF, Hébrard, G, Martioli, E, Heidari, N, Sousa, S, Boisse, I, Almenara, JM, Alonso-Santiago, J, Barros, SCC, Benni, P, Bieryla, A, Bonfils, X, Caldwell, DA, Ciardi, DR, Collins, KA, Cortés-Zuleta, P, Dalal, S, De León, JP, Deleuil, M, Delfosse, X, Demangeon, ODS, Esparza-Borges, E, Forveille, T, Frasca, A, Fukui, A, Gregorio, J, Guerrero, NM, Howell, SB, Hoyer, S, Ikuta, K, Jenkins, JM, Kiefer, F, Latham, DW, Marino, G, Michaels, EJ, Moutou, C, Murgas, F, Narita, N, Palle, E, Parviainen, H, Santos, NC, Stassun, KG & Winn, JN 2024, 'TOI-1199 b and TOI-1273 b: Two new transiting hot Saturns detected and characterized with SOPHIE and TESS', Astronomy and Astrophysics, vol. 684, A6. https://doi.org/10.1051/0004-6361/202348288

TY - JOUR

T1 - TOI-1199 b and TOI-1273 b

T2 - Two new transiting hot Saturns detected and characterized with SOPHIE and TESS

AU - Serrano Bell, J.

AU - Díaz, R. F.

AU - Hébrard, G.

AU - Martioli, E.

AU - Heidari, N.

AU - Sousa, S.

AU - Boisse, I.

AU - Almenara, J. M.

AU - Alonso-Santiago, J.

AU - Barros, S. C.C.

AU - Benni, P.

AU - Bieryla, A.

AU - Bonfils, X.

AU - Caldwell, D. A.

AU - Ciardi, D. R.

AU - Collins, K. A.

AU - Cortés-Zuleta, P.

AU - Dalal, S.

AU - De León, J. P.

AU - Deleuil, M.

AU - Delfosse, X.

AU - Demangeon, O. D.S.

AU - Esparza-Borges, E.

AU - Forveille, T.

AU - Frasca, A.

AU - Fukui, A.

AU - Gregorio, J.

AU - Guerrero, N. M.

AU - Howell, S. B.

AU - Hoyer, S.

AU - Ikuta, K.

AU - Jenkins, J. M.

AU - Kiefer, F.

AU - Latham, D. W.

AU - Marino, G.

AU - Michaels, E. J.

AU - Moutou, C.

AU - Murgas, F.

AU - Narita, N.

AU - Palle, E.

AU - Parviainen, H.

AU - Santos, N. C.

AU - Stassun, K. G.

AU - Winn, J. N.

PY - 2024/4/1

Y1 - 2024/4/1

N2 - We report the characterization of two planet candidates detected by the Transiting Exoplanet Survey Satellite (TESS), TOI-1199 b and TOI-1273 b, with periods of 3.7 and 4.6 days, respectively. Follow-up observations for both targets, which include several ground-based light curves, confirmed the transit events. High-precision radial velocities from the SOPHIE spectrograph revealed signals at the expected frequencies and phases of the transiting candidates and allowed mass determinations with a precision of 8.4% and 6.7% for TOI-1199 b and TOI-1273 b, respectively. The planetary and orbital parameters were derived from a joint analysis of the radial velocities and photometric data. We find that the planets have masses of 0.239 ± 0.020 MJ and 0.222 ± 0.015 MJ and radii of 0.938 ± 0.025 RJ and 0.99 ± 0.22 RJ, respectively. The grazing transit of TOI-1273 b translates to a larger uncertainty in its radius, and hence also in its bulk density, compared to TOI-1199 b. The inferred bulk densities of 0.358 ± 0.041 g cm-3 and 0.28 ± 0.11 g cm-3 are among the lowest known for exoplanets in this mass range, which, considering the brightness of the host stars (V≈11 mag), render them particularly amenable to atmospheric characterization via the transit spectroscopy technique. The better constraints on the parameters of TOI-1199 b provide a transmission spectroscopy metric of 134 ± 17, making it the better suited of the two planets for atmospheric studies.

AB - We report the characterization of two planet candidates detected by the Transiting Exoplanet Survey Satellite (TESS), TOI-1199 b and TOI-1273 b, with periods of 3.7 and 4.6 days, respectively. Follow-up observations for both targets, which include several ground-based light curves, confirmed the transit events. High-precision radial velocities from the SOPHIE spectrograph revealed signals at the expected frequencies and phases of the transiting candidates and allowed mass determinations with a precision of 8.4% and 6.7% for TOI-1199 b and TOI-1273 b, respectively. The planetary and orbital parameters were derived from a joint analysis of the radial velocities and photometric data. We find that the planets have masses of 0.239 ± 0.020 MJ and 0.222 ± 0.015 MJ and radii of 0.938 ± 0.025 RJ and 0.99 ± 0.22 RJ, respectively. The grazing transit of TOI-1273 b translates to a larger uncertainty in its radius, and hence also in its bulk density, compared to TOI-1199 b. The inferred bulk densities of 0.358 ± 0.041 g cm-3 and 0.28 ± 0.11 g cm-3 are among the lowest known for exoplanets in this mass range, which, considering the brightness of the host stars (V≈11 mag), render them particularly amenable to atmospheric characterization via the transit spectroscopy technique. The better constraints on the parameters of TOI-1199 b provide a transmission spectroscopy metric of 134 ± 17, making it the better suited of the two planets for atmospheric studies.

KW - planetary systems

KW - planets and satellites: detection

KW - planets and satellites: gaseous planets

KW - techniques: photometric

KW - techniques: radial velocities

UR - https://www.scopus.com/pages/publications/85189346793

UR - https://www.scopus.com/pages/publications/85189346793#tab=citedBy

U2 - 10.1051/0004-6361/202348288

DO - 10.1051/0004-6361/202348288

M3 - Article

AN - SCOPUS:85189346793

SN - 0004-6361

VL - 684

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A6

ER -

TOI-1199 b and TOI-1273 b: Two new transiting hot Saturns detected and characterized with SOPHIE and TESS

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