TOI-1268b: The youngest hot Saturn-mass transiting exoplanet
- 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.
- Kabath, P.
DOIAbstract
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 th...
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