TOI-1268b: The youngest hot Saturn-mass transiting exoplanet

0559176 - ASÚ 2023 RIV FR eng J - Článek v odborném periodiku
Šubjak, Ján - Endl, M. - Chaturvedi, P. - Karjalainen, Raine - Skarka, Marek - Blažek, Martin - Karjalainen, Marie - Špoková, Magdaléna - Kabáth, Petr … celkem 44 autorů
TOI-1268b: The youngest hot Saturn-mass transiting exoplanet.
Astronomy & Astrophysics. Roč. 662, June (2022), č. článku A107. ISSN 0004-6361. E-ISSN 1432-0746
Grant CEP: GA MŠMT(CZ) LTT20015
Institucionální podpora: RVO:67985815
Klíčová slova: techniques * spectroscopic * techniques
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 6.5, rok: 2022
Způsob publikování: Open access s časovým embargem
https://doi.org/10.1051/0004-6361/202142883

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-circle dot, a radius of R-* = 0.92 +/- 0.06 R-circle dot, an effective temperature of T-eff = 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 Ondrejov Observatories, we measured a planetary mass of M-p = 96.4 +/- 8.3 M-circle plus and a radius of R-p = 9.1 +/- 0.6 R-circle plus. 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 planet's tidal quality factor to the range of 10(4.5-5.3). When compared with the sample of other non-inflated Saturn-mass planets, TOI-1268b is one of the best candidates for transmission spectroscopy studies.
Trvalý link: https://hdl.handle.net/11104/0332719