Data di Pubblicazione:
2022
Abstract:
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.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
techniques; spectroscopic; techniques; radial velocities; techniques; photometric; planetary systems; planets and satellites; gaseous planets; planets and satellites; atmospheres
Elenco autori:
J. ??ubjak; M. Endl; P. Chaturvedi; R. Karjalainen; W. D. Cochran; M. Esposito; D. Gandolfi; K. W. F. Lam; K. Stassun; J. ????k; N. Lodieu; H. M. J. Boffin; P. J. MacQueen; A. Hatzes; E. W. Guenther; I. Georgieva; S. Grziwa; H. Schmerling; M. Skarka; M. Bla??ek; M. Karjalainen; M. ??pokov??; H. Isaacson; A. W. Howard; C. J. Burke; V. Van Eylen; B. Falk; M. Fridlund; E. Goffo; J. M. Jenkins; J. Korth; J. J. Lissauer; J. H. Livingston; R. Luque; A. Muresan; H. P. Osborn; E. Pall??; C. M. Persson; S. Redfield; G. R. Ricker; S. Seager; L. M. Serrano; A. M. S. Smith; P. Kab??th
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