Subjak, J., Endl, M., Chaturvedi, P., Karjalainen, R., Cochran, W. D., Esposito, M., Gandolfi, D., Lam, K. W. F., Stassun, K., Zak, J., Lodieu, N., Boffin, H. M. J., MacQueen, P. J., Hatzes, A., Guenther, E. W., Georgieva, I., Grziwa, S., Schmerling, H., Skarka, M., Blazek, M., Karjalainen, M., Spokova, M., Isaacson, H., Howard, A. W., Burke, C. J., Van Eylen, V., Falk, B., Fridlund, M., Goffo, E., Jenkins, J. M., Korth, J., Lissauer, J. J., Livingston, J. H., Luque, R., Muresan, A., Osborn, H. P., Palle, E., Persson, C. M., Redfield, S., Ricker, G. R., Seager, S., Serrano, L. M., Smith, A. M. S. and Kabath, P. (2022). TOI-1268b: The youngest hot Saturn-mass transiting exoplanet. Astron. Astrophys., 662. LES ULIS CEDEX A: EDP SCIENCES S A. ISSN 1432-0746

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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.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Subjak, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Endl, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Chaturvedi, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Karjalainen, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cochran, W. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Esposito, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gandolfi, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lam, K. W. F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stassun, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zak, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lodieu, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Boffin, H. M. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
MacQueen, P. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hatzes, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guenther, E. W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Georgieva, I.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Grziwa, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schmerling, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Skarka, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Blazek, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Karjalainen, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Spokova, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Isaacson, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Howard, A. W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Burke, C. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Van Eylen, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Falk, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fridlund, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Goffo, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jenkins, J. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Korth, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lissauer, J. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Livingston, J. H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Luque, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Muresan, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Osborn, H. P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Palle, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Persson, C. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Redfield, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ricker, G. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Seager, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Serrano, L. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Smith, A. M. S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kabath, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-698152
DOI: 10.1051/0004-6361/202142883
Journal or Publication Title: Astron. Astrophys.
Volume: 662
Date: 2022
Publisher: EDP SCIENCES S A
Place of Publication: LES ULIS CEDEX A
ISSN: 1432-0746
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
SOLAR-TYPE STARS; LITHIUM ABUNDANCES; ROTATION PERIODS; STELLAR ROTATION; WARM SATURN; CHROMOSPHERIC ACTIVITY; ECHELLE SPECTROMETER; EXTREME-ULTRAVIOLET; BAYESIAN-INFERENCE; TIDAL EVOLUTIONMultiple languages
Astronomy & AstrophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/69815

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