A puffy polar planet. The low density, hot Jupiter TOI-640 b is on a polar orbit

Knudstrup, Emil and Albrecht, Simon H. and Gandolfi, Davide and Marcussen, Marcus L. and Goffo, Elisa and Serrano, Luisa M. and Dai, Fei and Redfield, Seth and Hirano, Teruyuki and Csizmadia, Szilard and Cochran, William D. and Deeg, Hans J. and Fridlund, Malcolm and Lam, Kristine W. F. and Livingston, John H. and Luque, Rafael and Narita, Norio and Palle, E. and Persson, Carina M. and Van Eylen, Vincent (2023) A puffy polar planet. The low density, hot Jupiter TOI-640 b is on a polar orbit. Astronomy & Astrophysics, 671, A164. EDP Sciences. doi: 10.1051/0004-6361/202245301. ISSN 0004-6361.

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Official URL: https://www.aanda.org/articles/aa/full_html/2023/03/aa45301-22/aa45301-22.html

Abstract

TOI-640 b is a hot, puffy Jupiter with a mass of 0.57 ± 0.02 MJ and radius of 1.72 ± 0.05 RJ, orbiting a slightly evolved F-type star with a separation of 6.33 -0.06 +0.07 R_star. Through spectroscopic in-transit observations made with the HARPS spectrograph, we measured the Rossiter-McLaughlin effect, analysing both in-transit radial velocities and the distortion of the stellar spectral lines. From these observations, we find the host star to have a projected obliquity of λ = 184 ± 3°. From the TESS light curve, we measured the stellar rotation period, allowing us to determine the stellar inclination, i_star = 23 -2 +3°, meaning we are viewing the star pole-on. Combining this with the orbital inclination allowed us to calculate the host star obliquity, \ensuremathψ = 104 ± 2°. TOI-640 b joins a group of planets orbiting over stellar poles within the range 80° - 125°. The origin of this orbital configuration is not well understood.

Item URL in elib:

https://elib.dlr.de/195648/

Document Type:

Article

Title:

A puffy polar planet. The low density, hot Jupiter TOI-640 b is on a polar orbit

Authors:

Authors	Institution or Email of Authors	Author's ORCID iD	ORCID Put Code
Knudstrup, Emil	Stellar Astrophysics Centre, Dep. of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark	UNSPECIFIED	UNSPECIFIED
Albrecht, Simon H.	Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark	UNSPECIFIED	UNSPECIFIED
Gandolfi, Davide	Dipartimento di Fisica, Universita degli Studi di Torino, via Pietro Giuria 1, I-10125, Torino, Italy	https://orcid.org/0000-0001-8627-9628	UNSPECIFIED
Marcussen, Marcus L.	Stellar Astrophysics Centre, Dep. of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark	UNSPECIFIED	UNSPECIFIED
Goffo, Elisa	Dipartimento di Fisica, Università degli Studi di Torino, via PietroGiuria 1, I-10125, Torino, Italy ; Thüringer Landessternwarte Tautenburg, Germany	UNSPECIFIED	UNSPECIFIED
Serrano, Luisa M.	Dipartimento di Fisica, Universita degli Studi di Torino, via Pietro Giuria 1, 10125 Torino, Italy	UNSPECIFIED	UNSPECIFIED
Dai, Fei	Division of Geological and Planetary Sciences, 1200 E California Boulevard, Pasadena, CA, 91125, USA	UNSPECIFIED	UNSPECIFIED
Redfield, Seth	Astronomy Department and Van Vleck Observatory, Wesleyan University, Middletown, CT 06459, USA 0000-0003-3786-3486	UNSPECIFIED	UNSPECIFIED
Hirano, Teruyuki	Astrobiology Center, 2-21-1 Osawa, Mitaka, Tokyo	UNSPECIFIED	UNSPECIFIED
Csizmadia, Szilard	UNSPECIFIED	https://orcid.org/0000-0001-6803-9698	UNSPECIFIED
Cochran, William D.	Center for Planetary Systems Habitability and McDonald Observa- tory, The University of Texas at Austin, Austin Texas USA 78712, USA	UNSPECIFIED	UNSPECIFIED
Deeg, Hans J.	Instituto de Astrofisica de Canarias, C/ Via Lactea s/n, E-38205 La Laguna, Spain ; Departamento de Astrofisica, Universidad de La Laguna, E-38206 La Laguna, Spain 0000-0003-0047-4241	UNSPECIFIED	UNSPECIFIED
Fridlund, Malcolm	Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, SE-439 92 Onsala, Sweden ; Leiden Observatory, University of Leiden, PO Box 9513, 2300 RA, Leiden, The Netherlands 0000-0003-2180-9936	UNSPECIFIED	UNSPECIFIED
Lam, Kristine W. F.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Livingston, John H.	Astrobiology Center, 2-21-1 Osawa, Mitaka, Tokyo	UNSPECIFIED	UNSPECIFIED
Luque, Rafael	Department of Astronomy & Astrophysics, University of Chicago, Chicago, IL 60637, USA	UNSPECIFIED	UNSPECIFIED
Narita, Norio	Komaba Institute for Science, The University of Tokyo, Tokyo, Japan; PRESTO, JST, Tokyo, Japan; Astrobiology Center, Tokyo, Japan; National Astronomical Observatory of Japan, Tokyo, Japan; Instituto de Astrofísica de Canarias (IAC), Tenerife, Spain	UNSPECIFIED	UNSPECIFIED
Palle, E.	Instituto de Astrofísica de Canarias (IAC), 38205 La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206 La Laguna, Tenerife, Spain	UNSPECIFIED	UNSPECIFIED
Persson, Carina M.	Department of Space, Earth and Environmanet, Chalmers University of Technology, Onsala space Observatory, SE-439 92 Onsala Sweden	UNSPECIFIED	UNSPECIFIED
Van Eylen, Vincent	Mullard Space Science Laboratory, University College London, Holmbury St Mary, Dorking, Surrey RH5 6NT, UK	UNSPECIFIED	UNSPECIFIED

Date:

March 2023

Journal or Publication Title:

Astronomy & Astrophysics

Refereed publication:

Yes

Open Access:

Yes

Gold Open Access:

In SCOPUS:

Yes

In ISI Web of Science:

Yes

Volume:

671

DOI:

10.1051/0004-6361/202245301

Page Range:

A164

Publisher:

EDP Sciences

ISSN:

0004-6361

Status:

Published

Keywords:

planet-star interactions, techniques: photometric, techniques: spectroscopic, planets and satellites: gaseous planets, Astrophysics - Earth and Planetary Astrophysics

HGF - Research field:

Aeronautics, Space and Transport

HGF - Program:

Space

HGF - Program Themes:

Space Exploration

DLR - Research area:

Raumfahrt

DLR - Program:

R EW - Space Exploration

DLR - Research theme (Project):

R - Project PLATO - PMC and Science

Location:

Berlin-Adlershof

Institutes and Institutions:

Institute of Planetary Research > Extrasolar Planets and Atmospheres

Deposited By:

Lam, Wai Fun

Deposited On:

27 Jun 2023 10:02

Last Modified:

27 Jun 2023 10:02

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