Rossiter-McLaughlin detection of the 9-month period transiting exoplanet HIP41378 d

S. Grouffal; Alexander Santerne; Vincent Bourrier; X. Dumusque; A.~H.~M.~J. Triaud; L. Malavolta; V. Kunovac; D.~J. Armstrong; O. Attia; S.~C.~C. Barros; Isabelle Boisse; M. Deleuil; O.~D.~S. Demangeon; C.~D. Dressing; Pedro Figueira; Jorge Lillo-box; A. Mortier; Domenico Nardiello; Nuno C. Santos; S.~G. Sousa

doi:10.1051/0004-6361/202244182

Rossiter-McLaughlin detection of the 9-month period transiting exoplanet HIP41378 d

S. Grouffal^*, Alexander Santerne, Vincent Bourrier, X. Dumusque, A.~H.~M.~J. Triaud, L. Malavolta, V. Kunovac, D.~J. Armstrong, O. Attia, S.~C.~C. Barros, Isabelle Boisse, M. Deleuil, O.~D.~S. Demangeon, C.~D. Dressing, Pedro Figueira, Jorge Lillo-box, A. Mortier, Domenico Nardiello, Nuno C. Santos, S.~G. Sousa

^*Corresponding author for this work

Physics and Astronomy

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Abstract

The Rossiter-McLaughlin (RM) effect is a method that allows us to measure the orbital obliquity of planets, which is an important constraint that has been used to understand the formation and migration mechanisms of planets, especially for hot Jupiters. In this paper, we present the RM observation of the Neptune-sized long-period transiting planet HIP41378 d. Those observations were obtained using the HARPS-N/TNG and ESPRESSO/ESO-VLT spectrographs over two transit events in 2019 and 2022. The analysis of the data with both the classical RM and the RM Revolutions methods allows us to confirm that the orbital period of this planet is 278 days and that the planet is on a prograde orbit with an obliquity of λ = 57.1+26.4-17.9 degrees, a value which is consistent between both methods. HIP41378 d is the longest period planet for which the obliquity was measured so far. We do not detect transit timing variations with a precision of 30 and 100 minutes for the 2019 and 2022 transits, respectively. This result also illustrates that the RM effect provides a solution to follow-up from the ground the transit of small and long-period planets such as those that will be detected by the forthcoming ESA's PLATO mission.

Original language	English
Article number	A172
Journal	Astronomy and Astrophysics
Volume	668
DOIs	https://doi.org/10.1051/0004-6361/202244182
Publication status	Published - 20 Dec 2022

Keywords

Astrophysics - Earth and Planetary Astrophysics

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GrouffalS2022Rossiter-McLaughlinFinal published version, 2.96 MBLicence: Creative Commons: Attribution (CC BY)

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Grouffal, S., Santerne, A., Bourrier, V., Dumusque, X., Triaud, A. H. M. J., Malavolta, L., Kunovac, V., Armstrong, D. J., Attia, O., Barros, S. C. C., Boisse, I., Deleuil, M., Demangeon, O. D. S., Dressing, C. D., Figueira, P., Lillo-box, J., Mortier, A., Nardiello, D., Santos, N. C., & Sousa, S. G. (2022). Rossiter-McLaughlin detection of the 9-month period transiting exoplanet HIP41378 d. Astronomy and Astrophysics, 668, Article A172. https://doi.org/10.1051/0004-6361/202244182

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title = "Rossiter-McLaughlin detection of the 9-month period transiting exoplanet HIP41378 d",

abstract = "The Rossiter-McLaughlin (RM) effect is a method that allows us to measure the orbital obliquity of planets, which is an important constraint that has been used to understand the formation and migration mechanisms of planets, especially for hot Jupiters. In this paper, we present the RM observation of the Neptune-sized long-period transiting planet HIP41378 d. Those observations were obtained using the HARPS-N/TNG and ESPRESSO/ESO-VLT spectrographs over two transit events in 2019 and 2022. The analysis of the data with both the classical RM and the RM Revolutions methods allows us to confirm that the orbital period of this planet is 278 days and that the planet is on a prograde orbit with an obliquity of λ = 57.1+26.4-17.9 degrees, a value which is consistent between both methods. HIP41378 d is the longest period planet for which the obliquity was measured so far. We do not detect transit timing variations with a precision of 30 and 100 minutes for the 2019 and 2022 transits, respectively. This result also illustrates that the RM effect provides a solution to follow-up from the ground the transit of small and long-period planets such as those that will be detected by the forthcoming ESA's PLATO mission.",

keywords = "Astrophysics - Earth and Planetary Astrophysics",

author = "S. Grouffal and Alexander Santerne and Vincent Bourrier and X. Dumusque and A.~H.~M.~J. Triaud and L. Malavolta and V. Kunovac and D.~J. Armstrong and O. Attia and S.~C.~C. Barros and Isabelle Boisse and M. Deleuil and O.~D.~S. Demangeon and C.~D. Dressing and Pedro Figueira and Jorge Lillo-box and A. Mortier and Domenico Nardiello and Santos, {Nuno C.} and S.~G. Sousa",

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doi = "10.1051/0004-6361/202244182",

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Grouffal, S, Santerne, A, Bourrier, V, Dumusque, X, Triaud, AHMJ, Malavolta, L, Kunovac, V, Armstrong, DJ, Attia, O, Barros, SCC, Boisse, I, Deleuil, M, Demangeon, ODS, Dressing, CD, Figueira, P, Lillo-box, J, Mortier, A, Nardiello, D, Santos, NC & Sousa, SG 2022, 'Rossiter-McLaughlin detection of the 9-month period transiting exoplanet HIP41378 d', Astronomy and Astrophysics, vol. 668, A172. https://doi.org/10.1051/0004-6361/202244182

TY - JOUR

T1 - Rossiter-McLaughlin detection of the 9-month period transiting exoplanet HIP41378 d

AU - Grouffal, S.

AU - Santerne, Alexander

AU - Bourrier, Vincent

AU - Dumusque, X.

AU - Triaud, A.~H.~M.~J.

AU - Malavolta, L.

AU - Kunovac, V.

AU - Armstrong, D.~J.

AU - Attia, O.

AU - Barros, S.~C.~C.

AU - Boisse, Isabelle

AU - Deleuil, M.

AU - Demangeon, O.~D.~S.

AU - Dressing, C.~D.

AU - Figueira, Pedro

AU - Lillo-box, Jorge

AU - Mortier, A.

AU - Nardiello, Domenico

AU - Santos, Nuno C.

AU - Sousa, S.~G.

PY - 2022/12/20

Y1 - 2022/12/20

N2 - The Rossiter-McLaughlin (RM) effect is a method that allows us to measure the orbital obliquity of planets, which is an important constraint that has been used to understand the formation and migration mechanisms of planets, especially for hot Jupiters. In this paper, we present the RM observation of the Neptune-sized long-period transiting planet HIP41378 d. Those observations were obtained using the HARPS-N/TNG and ESPRESSO/ESO-VLT spectrographs over two transit events in 2019 and 2022. The analysis of the data with both the classical RM and the RM Revolutions methods allows us to confirm that the orbital period of this planet is 278 days and that the planet is on a prograde orbit with an obliquity of λ = 57.1+26.4-17.9 degrees, a value which is consistent between both methods. HIP41378 d is the longest period planet for which the obliquity was measured so far. We do not detect transit timing variations with a precision of 30 and 100 minutes for the 2019 and 2022 transits, respectively. This result also illustrates that the RM effect provides a solution to follow-up from the ground the transit of small and long-period planets such as those that will be detected by the forthcoming ESA's PLATO mission.

AB - The Rossiter-McLaughlin (RM) effect is a method that allows us to measure the orbital obliquity of planets, which is an important constraint that has been used to understand the formation and migration mechanisms of planets, especially for hot Jupiters. In this paper, we present the RM observation of the Neptune-sized long-period transiting planet HIP41378 d. Those observations were obtained using the HARPS-N/TNG and ESPRESSO/ESO-VLT spectrographs over two transit events in 2019 and 2022. The analysis of the data with both the classical RM and the RM Revolutions methods allows us to confirm that the orbital period of this planet is 278 days and that the planet is on a prograde orbit with an obliquity of λ = 57.1+26.4-17.9 degrees, a value which is consistent between both methods. HIP41378 d is the longest period planet for which the obliquity was measured so far. We do not detect transit timing variations with a precision of 30 and 100 minutes for the 2019 and 2022 transits, respectively. This result also illustrates that the RM effect provides a solution to follow-up from the ground the transit of small and long-period planets such as those that will be detected by the forthcoming ESA's PLATO mission.

KW - Astrophysics - Earth and Planetary Astrophysics

U2 - 10.1051/0004-6361/202244182

DO - 10.1051/0004-6361/202244182

M3 - Article

SN - 0004-6361

VL - 668

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A172

ER -

Rossiter-McLaughlin detection of the 9-month period transiting exoplanet HIP41378 d

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