TOI-1268b: The youngest hot Saturn-mass transiting exoplanet
Artikel i vetenskaplig tidskrift, 2022

We report the discovery of TOI-1268b, a transiting Saturn-mass planet from the TESS space mission. With an age of less than 1 Gyr, derived from various age indicators, TOI-1268b is the youngest Saturn-mass planet known to date; it contributes to the small sample of well-characterised young planets. It has an orbital period of P = 8.1577080 ± 0.0000044 days, and transits an early K-dwarf star with a mass of M∗ = 0.96 ± 0.04 M+, a radius of R∗ = 0.92 ± 0.06 R+, an effective temperature of Teff = 5300 ± 100 K, and a metallicity of 0.36 ± 0.06 dex. By combining TESS photometry with high-resolution spectra acquired with the Tull spectrograph at the McDonald Observatory, and the high-resolution spectrographs at the Tautenburg and OndR ejov Observatories, we measured a planetary mass of Mp = 96.4 ± 8.3 Mp and a radius of Rp = 9.1 ± 0.6 Rp. TOI-1268 is an ideal system for studying the role of star-planet tidal interactions for non-inflated Saturn-mass planets. We used system parameters derived in this paper to constrain the planeta's tidal quality factor to the range of 104.5-5.3. When compared with the sample of other non-inflated Saturn-mass planets, TOI-1268b is one of the best candidates for transmission spectroscopy studies.

Techniques: radial velocities

Planets and satellites: gaseous planets

Techniques: spectroscopic

Planetary systems

Planets and satellites: Atmospheres

Techniques: photometric

Författare

J. Šubjak

Czech Academy of Sciences

European Southern Observatory (ESO)

Univerzita Karlova

M. Endl

The University of Texas at Austin

Priyanka Chaturvedi

Thüringer Landessternwarte Tautenburg

R. Karjalainen

Czech Academy of Sciences

William D. Cochran

The University of Texas at Austin

M. Esposito

Thüringer Landessternwarte Tautenburg

D. Gandolfi

Universita degli Studi di Torino

K. W.F. Lam

Deutsches Zentrums für Luft- und Raumfahrt (DLR)

Technische Universität Berlin

Keivan G. Stassun

Fisk University

Vanderbilt University

Jirí Žák

European Southern Observatory (ESO)

N. Lodieu

Instituto de Astrofísica de Canarias

Universidad de la Laguna

Henri M. J. Boffin

European Southern Observatory (ESO)

P. MacQueen

The University of Texas at Austin

A. Hatzes

Thüringer Landessternwarte Tautenburg

E. W. Guenther

Thüringer Landessternwarte Tautenburg

Iskra Georgieva

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik

S. Grziwa

Universität zu Köln

H. Schmerling

Universität zu Köln

Marek Skarka

Czech Academy of Sciences

M. Blažek

Czech Academy of Sciences

Masarykova Univerzita

M. Karjalainen

Czech Academy of Sciences

Magdalena Špoková

Czech Academy of Sciences

Masarykova Univerzita

H. Isaacson

University of California

A. W. Howard

California Institute of Technology (Caltech)

Christopher J. Burke

Massachusetts Institute of Technology (MIT)

Vincent Van Eylen

University College London (UCL)

B. Falk

Space Telescope Science Institute (STScI)

Malcolm Fridlund

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik

Universiteit Leiden

E. Goffo

Universita degli Studi di Torino

Thüringer Landessternwarte Tautenburg

Jon M. Jenkins

NASA Ames Research Center

Judith Korth

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik

Jack J. Lissauer

NASA Ames Research Center

J.H. Livingston

National Astronomical Observatory of Japan

University of Tokyo

National Institutes of Natural Sciences

R. Luque

Instituto de Astrofisica de Andalucía (IAA)

Alexandra Muresan

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik

H. P. Osborn

Massachusetts Institute of Technology (MIT)

Universität Bern

Enric Palle

Universidad de la Laguna

Instituto de Astrofísica de Canarias

Carina Persson

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik

S. Redfield

Wesleyan University

George R. Ricker

Massachusetts Institute of Technology (MIT)

S. Seager

Massachusetts Institute of Technology (MIT)

L. M. Serrano

Universita degli Studi di Torino

Alexis M. S. Smith

Deutsches Zentrums für Luft- und Raumfahrt (DLR)

Petr Kabath

Czech Academy of Sciences

Astronomy and Astrophysics

0004-6361 (ISSN) 1432-0746 (eISSN)

Vol. 662 A107

Ämneskategorier

Subatomär fysik

Analytisk kemi

Astronomi, astrofysik och kosmologi

DOI

10.1051/0004-6361/202142883

Mer information

Senast uppdaterat

2022-08-08