TOI-1296b and TOI-1298b observed with TESS and SOPHIE: Two hot Saturn-mass exoplanets with different densities around metal-rich stars

C. Moutou; J. M. Almenara; G. Hébrard; N. C. Santos; K. G. Stassun; S. Deheuvels; S. Barros; P. Benni; A. Bieryla; I. Boisse; X. Bonfils; P. T. Boyd; K. A. Collins; D. Baker; P. Cortés-Zuleta; S. Dalal; F. Debras; M. Deleuil; X. Delfosse; O. Demangeon; Z. Essack; T. Forveille; E. Girardin; P. Guerra; N. Heidari; K. Hesse; S. Hoyer; J. M. Jenkins; F. Kiefer; P. C. König; D. Laloum; D. Latham; T. Lopez; E. Martioli; H. P. Osborn; G. Ricker; S. Seager; R. Vanderspek; M. Vezie; J. Villaseñor; J. Winn; B. Wohler; C. Ziegler

doi:10.1051/0004-6361/202141151

TOI-1296b and TOI-1298b observed with TESS and SOPHIE: Two hot Saturn-mass exoplanets with different densities around metal-rich stars

C. Moutou, J. M. Almenara, G. Hébrard, N. C. Santos, K. G. Stassun, S. Deheuvels, S. Barros, P. Benni, A. Bieryla, I. Boisse, X. Bonfils, P. T. Boyd, K. A. Collins, D. Baker, P. Cortés-Zuleta, S. Dalal, F. Debras, M. Deleuil, X. Delfosse, O. DemangeonZ. Essack, T. Forveille, E. Girardin, P. Guerra, N. Heidari, K. Hesse, S. Hoyer, J. M. Jenkins, F. Kiefer, P. C. König, D. Laloum, D. Latham, T. Lopez, E. Martioli, H. P. Osborn, G. Ricker, S. Seager, R. Vanderspek, M. Vezie, J. Villaseñor, J. Winn, B. Wohler, C. Ziegler

Astrophysical Sciences

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Abstract

We present the discovery of two new transiting extrasolar planet candidates identified as TOI-1296.01 and TOI-1298.01 by the Transiting Exoplanet Survey Satellite (TESS). The planetary nature of these candidates has been secured with the SOPHIE high-precision spectrograph through the measurement of the companion's mass with the radial velocity method. Both planets are similar to Saturn in mass and have similar orbital periods of a few days. They, however, show discrepant radii and therefore different densities. The radius discrepancy might be explained by the different levels of irradiation by the host stars. The subgiant star TOI-1296 hosts a low-density planet with 1.2 RJup while the less luminous, lower-size star TOI-1298 hosts a much denser planet with a 0.84 RJup radius, resulting in bulk densities of 0.198 and 0.743 g cm-3, respectively.In addition, both stars are strongly enriched in heavy elements, having metallicities of +0.44 and +0.49 dex, respectively. The planet masses and orbital periods are 0.298 ± 0.039 MJup and 3.9443715 ± 5.8 ± 10-6 days for TOI-1296b, and 0.356 ± 0.032 MJup and 4.537164 ± 1.2 ± 10-5 days for TOI-1298b. The mass measurements have a relative precision of better than 13%.

Original language	English (US)
Article number	A147
Journal	Astronomy and Astrophysics
Volume	653
DOIs	https://doi.org/10.1051/0004-6361/202141151
State	Published - Sep 1 2021

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Methods: observational
Planetary systems
Planets and satellites: gaseous planets
Techniques: photometric
Techniques: radial velocities

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10.1051/0004-6361/202141151

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Moutou, C., Almenara, J. M., Hébrard, G., Santos, N. C., Stassun, K. G., Deheuvels, S., Barros, S., Benni, P., Bieryla, A., Boisse, I., Bonfils, X., Boyd, P. T., Collins, K. A., Baker, D., Cortés-Zuleta, P., Dalal, S., Debras, F., Deleuil, M., Delfosse, X., ... Ziegler, C. (2021). TOI-1296b and TOI-1298b observed with TESS and SOPHIE: Two hot Saturn-mass exoplanets with different densities around metal-rich stars. Astronomy and Astrophysics, 653, Article A147. https://doi.org/10.1051/0004-6361/202141151

@article{041f82acf3f24db3b948a63236aaaff7,

title = "TOI-1296b and TOI-1298b observed with TESS and SOPHIE: Two hot Saturn-mass exoplanets with different densities around metal-rich stars",

abstract = "We present the discovery of two new transiting extrasolar planet candidates identified as TOI-1296.01 and TOI-1298.01 by the Transiting Exoplanet Survey Satellite (TESS). The planetary nature of these candidates has been secured with the SOPHIE high-precision spectrograph through the measurement of the companion's mass with the radial velocity method. Both planets are similar to Saturn in mass and have similar orbital periods of a few days. They, however, show discrepant radii and therefore different densities. The radius discrepancy might be explained by the different levels of irradiation by the host stars. The subgiant star TOI-1296 hosts a low-density planet with 1.2 RJup while the less luminous, lower-size star TOI-1298 hosts a much denser planet with a 0.84 RJup radius, resulting in bulk densities of 0.198 and 0.743 g cm-3, respectively.In addition, both stars are strongly enriched in heavy elements, having metallicities of +0.44 and +0.49 dex, respectively. The planet masses and orbital periods are 0.298 ± 0.039 MJup and 3.9443715 ± 5.8 ± 10-6 days for TOI-1296b, and 0.356 ± 0.032 MJup and 4.537164 ± 1.2 ± 10-5 days for TOI-1298b. The mass measurements have a relative precision of better than 13%.",

keywords = "Methods: observational, Planetary systems, Planets and satellites: gaseous planets, Techniques: photometric, Techniques: radial velocities",

author = "C. Moutou and Almenara, {J. M.} and G. H{\'e}brard and Santos, {N. C.} and Stassun, {K. G.} and S. Deheuvels and S. Barros and P. Benni and A. Bieryla and I. Boisse and X. Bonfils and Boyd, {P. T.} and Collins, {K. A.} and D. Baker and P. Cort{\'e}s-Zuleta and S. Dalal and F. Debras and M. Deleuil and X. Delfosse and O. Demangeon and Z. Essack and T. Forveille and E. Girardin and P. Guerra and N. Heidari and K. Hesse and S. Hoyer and Jenkins, {J. M.} and F. Kiefer and K{\"o}nig, {P. C.} and D. Laloum and D. Latham and T. Lopez and E. Martioli and Osborn, {H. P.} and G. Ricker and S. Seager and R. Vanderspek and M. Vezie and J. Villase{\~n}or and J. Winn and B. Wohler and C. Ziegler",

note = "Publisher Copyright: {\textcopyright} C. Moutou et al. 2021.",

year = "2021",

month = sep,

day = "1",

doi = "10.1051/0004-6361/202141151",

language = "English (US)",

volume = "653",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Moutou, C, Almenara, JM, Hébrard, G, Santos, NC, Stassun, KG, Deheuvels, S, Barros, S, Benni, P, Bieryla, A, Boisse, I, Bonfils, X, Boyd, PT, Collins, KA, Baker, D, Cortés-Zuleta, P, Dalal, S, Debras, F, Deleuil, M, Delfosse, X, Demangeon, O, Essack, Z, Forveille, T, Girardin, E, Guerra, P, Heidari, N, Hesse, K, Hoyer, S, Jenkins, JM, Kiefer, F, König, PC, Laloum, D, Latham, D, Lopez, T, Martioli, E, Osborn, HP, Ricker, G, Seager, S, Vanderspek, R, Vezie, M, Villaseñor, J, Winn, J, Wohler, B & Ziegler, C 2021, 'TOI-1296b and TOI-1298b observed with TESS and SOPHIE: Two hot Saturn-mass exoplanets with different densities around metal-rich stars', Astronomy and Astrophysics, vol. 653, A147. https://doi.org/10.1051/0004-6361/202141151

TY - JOUR

T1 - TOI-1296b and TOI-1298b observed with TESS and SOPHIE

T2 - Two hot Saturn-mass exoplanets with different densities around metal-rich stars

AU - Moutou, C.

AU - Almenara, J. M.

AU - Hébrard, G.

AU - Santos, N. C.

AU - Stassun, K. G.

AU - Deheuvels, S.

AU - Barros, S.

AU - Benni, P.

AU - Bieryla, A.

AU - Boisse, I.

AU - Bonfils, X.

AU - Boyd, P. T.

AU - Collins, K. A.

AU - Baker, D.

AU - Cortés-Zuleta, P.

AU - Dalal, S.

AU - Debras, F.

AU - Deleuil, M.

AU - Delfosse, X.

AU - Demangeon, O.

AU - Essack, Z.

AU - Forveille, T.

AU - Girardin, E.

AU - Guerra, P.

AU - Heidari, N.

AU - Hesse, K.

AU - Hoyer, S.

AU - Jenkins, J. M.

AU - Kiefer, F.

AU - König, P. C.

AU - Laloum, D.

AU - Latham, D.

AU - Lopez, T.

AU - Martioli, E.

AU - Osborn, H. P.

AU - Ricker, G.

AU - Seager, S.

AU - Vanderspek, R.

AU - Vezie, M.

AU - Villaseñor, J.

AU - Winn, J.

AU - Wohler, B.

AU - Ziegler, C.

PY - 2021/9/1

Y1 - 2021/9/1

N2 - We present the discovery of two new transiting extrasolar planet candidates identified as TOI-1296.01 and TOI-1298.01 by the Transiting Exoplanet Survey Satellite (TESS). The planetary nature of these candidates has been secured with the SOPHIE high-precision spectrograph through the measurement of the companion's mass with the radial velocity method. Both planets are similar to Saturn in mass and have similar orbital periods of a few days. They, however, show discrepant radii and therefore different densities. The radius discrepancy might be explained by the different levels of irradiation by the host stars. The subgiant star TOI-1296 hosts a low-density planet with 1.2 RJup while the less luminous, lower-size star TOI-1298 hosts a much denser planet with a 0.84 RJup radius, resulting in bulk densities of 0.198 and 0.743 g cm-3, respectively.In addition, both stars are strongly enriched in heavy elements, having metallicities of +0.44 and +0.49 dex, respectively. The planet masses and orbital periods are 0.298 ± 0.039 MJup and 3.9443715 ± 5.8 ± 10-6 days for TOI-1296b, and 0.356 ± 0.032 MJup and 4.537164 ± 1.2 ± 10-5 days for TOI-1298b. The mass measurements have a relative precision of better than 13%.

AB - We present the discovery of two new transiting extrasolar planet candidates identified as TOI-1296.01 and TOI-1298.01 by the Transiting Exoplanet Survey Satellite (TESS). The planetary nature of these candidates has been secured with the SOPHIE high-precision spectrograph through the measurement of the companion's mass with the radial velocity method. Both planets are similar to Saturn in mass and have similar orbital periods of a few days. They, however, show discrepant radii and therefore different densities. The radius discrepancy might be explained by the different levels of irradiation by the host stars. The subgiant star TOI-1296 hosts a low-density planet with 1.2 RJup while the less luminous, lower-size star TOI-1298 hosts a much denser planet with a 0.84 RJup radius, resulting in bulk densities of 0.198 and 0.743 g cm-3, respectively.In addition, both stars are strongly enriched in heavy elements, having metallicities of +0.44 and +0.49 dex, respectively. The planet masses and orbital periods are 0.298 ± 0.039 MJup and 3.9443715 ± 5.8 ± 10-6 days for TOI-1296b, and 0.356 ± 0.032 MJup and 4.537164 ± 1.2 ± 10-5 days for TOI-1298b. The mass measurements have a relative precision of better than 13%.

KW - Methods: observational

KW - Planetary systems

KW - Planets and satellites: gaseous planets

KW - Techniques: photometric

KW - Techniques: radial velocities

UR - http://www.scopus.com/inward/record.url?scp=85116036895&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85116036895&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/202141151

DO - 10.1051/0004-6361/202141151

M3 - Article

AN - SCOPUS:85116036895

SN - 0004-6361

VL - 653

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A147

ER -

TOI-1296b and TOI-1298b observed with TESS and SOPHIE: Two hot Saturn-mass exoplanets with different densities around metal-rich stars

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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