The Orbit of Warm Jupiter WASP-106 b is Aligned with its Star

Jan-Vincent Harre; Alexis M. S. Smith; Teruyuki Hirano; Szilárd Csizmadia; Amaury H. M. J. Triaud; David R. Anderson

doi:10.3847/1538-3881/acf46d

The Orbit of Warm Jupiter WASP-106 b is Aligned with its Star

Jan-Vincent Harre^*, Alexis M. S. Smith, Teruyuki Hirano, Szilárd Csizmadia, Amaury H. M. J. Triaud, David R. Anderson

^*Corresponding author for this work

Physics and Astronomy

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Abstract

Understanding orbital obliquities, or the misalignment angles between a star’s rotation axis and the orbital axis of its planets, is crucial for unraveling the mechanisms of planetary formation and migration. In this study, we present an analysis of Rossiter–McLaughlin (RM) observations of the warm Jupiter exoplanet WASP-106 b. The high-precision radial velocity measurements were made with HARPS and HARPS-N during the transit of this planet. We aim to constrain the orientation of the planet’s orbit relative to its host star’s rotation axis. The RM observations are analyzed using a code which models the RM anomaly together with the Keplerian orbit given several parameters in combination with a Markov chain Monte Carlo implementation. We measure the projected stellar obliquity in the WASP-106 system for the first time and find λ = (−1 ± 11)°, supporting the theory of quiescent migration through the disk.

Original language	English
Article number	159
Number of pages	8
Journal	The Astronomical Journal
Volume	166
Issue number	4
Early online date	18 Sept 2023
DOIs	https://doi.org/10.3847/1538-3881/acf46d
Publication status	Published - 1 Oct 2023

Keywords

Exoplanet evolution
Photometry
Radial velocity
Transits
Exoplanet migration

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title = "The Orbit of Warm Jupiter WASP-106 b is Aligned with its Star",

abstract = "Understanding orbital obliquities, or the misalignment angles between a star{\textquoteright}s rotation axis and the orbital axis of its planets, is crucial for unraveling the mechanisms of planetary formation and migration. In this study, we present an analysis of Rossiter–McLaughlin (RM) observations of the warm Jupiter exoplanet WASP-106 b. The high-precision radial velocity measurements were made with HARPS and HARPS-N during the transit of this planet. We aim to constrain the orientation of the planet{\textquoteright}s orbit relative to its host star{\textquoteright}s rotation axis. The RM observations are analyzed using a code which models the RM anomaly together with the Keplerian orbit given several parameters in combination with a Markov chain Monte Carlo implementation. We measure the projected stellar obliquity in the WASP-106 system for the first time and find λ = (−1 ± 11)°, supporting the theory of quiescent migration through the disk.",

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author = "Jan-Vincent Harre and Smith, {Alexis M. S.} and Teruyuki Hirano and Szil{\'a}rd Csizmadia and {J. Triaud}, {Amaury H. M.} and Anderson, {David R.}",

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AU - Harre, Jan-Vincent

AU - Smith, Alexis M. S.

AU - Hirano, Teruyuki

AU - Csizmadia, Szilárd

AU - J. Triaud, Amaury H. M.

AU - Anderson, David R.

PY - 2023/10/1

Y1 - 2023/10/1

N2 - Understanding orbital obliquities, or the misalignment angles between a star’s rotation axis and the orbital axis of its planets, is crucial for unraveling the mechanisms of planetary formation and migration. In this study, we present an analysis of Rossiter–McLaughlin (RM) observations of the warm Jupiter exoplanet WASP-106 b. The high-precision radial velocity measurements were made with HARPS and HARPS-N during the transit of this planet. We aim to constrain the orientation of the planet’s orbit relative to its host star’s rotation axis. The RM observations are analyzed using a code which models the RM anomaly together with the Keplerian orbit given several parameters in combination with a Markov chain Monte Carlo implementation. We measure the projected stellar obliquity in the WASP-106 system for the first time and find λ = (−1 ± 11)°, supporting the theory of quiescent migration through the disk.

AB - Understanding orbital obliquities, or the misalignment angles between a star’s rotation axis and the orbital axis of its planets, is crucial for unraveling the mechanisms of planetary formation and migration. In this study, we present an analysis of Rossiter–McLaughlin (RM) observations of the warm Jupiter exoplanet WASP-106 b. The high-precision radial velocity measurements were made with HARPS and HARPS-N during the transit of this planet. We aim to constrain the orientation of the planet’s orbit relative to its host star’s rotation axis. The RM observations are analyzed using a code which models the RM anomaly together with the Keplerian orbit given several parameters in combination with a Markov chain Monte Carlo implementation. We measure the projected stellar obliquity in the WASP-106 system for the first time and find λ = (−1 ± 11)°, supporting the theory of quiescent migration through the disk.

KW - Exoplanet evolution

KW - Photometry

KW - Radial velocity

KW - Transits

KW - Exoplanet migration

U2 - 10.3847/1538-3881/acf46d

DO - 10.3847/1538-3881/acf46d

M3 - Article

SN - 0004-6256

VL - 166

JO - The Astronomical Journal

JF - The Astronomical Journal

IS - 4

M1 - 159

ER -

The Orbit of Warm Jupiter WASP-106 b is Aligned with its Star

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