TOI-1268b : The youngest hot Saturn-mass transiting exoplanet
(2022) In Astronomy and Astrophysics 662.- 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+, 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... (More)
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.
(Less)
- author
- publishing date
- 2022-06-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Planetary systems, Planets and satellites: Atmospheres, Planets and satellites: gaseous planets, Techniques: photometric, Techniques: radial velocities, Techniques: spectroscopic
- in
- Astronomy and Astrophysics
- volume
- 662
- article number
- A107
- publisher
- EDP Sciences
- external identifiers
-
- scopus:85133281398
- ISSN
- 0004-6361
- DOI
- 10.1051/0004-6361/202142883
- language
- English
- LU publication?
- no
- additional info
- Publisher Copyright: © ESO 2022.
- id
- 2ae22dc5-442b-4dea-8b7b-7a232011cd75
- date added to LUP
- 2023-01-17 09:38:58
- date last changed
- 2023-01-25 11:25:03
@article{2ae22dc5-442b-4dea-8b7b-7a232011cd75, abstract = {{<p>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.</p>}}, author = {{Šubjak, J. and Endl, M. and Chaturvedi, P. and Karjalainen, R. and Cochran, W. D. and Esposito, M. and Gandolfi, D. and Lam, K. W. F. and Stassun, K. and Žák, J. and Lodieu, N. and Boffin, H. M. J. and MacQueen, P. J. and Hatzes, A. and Guenther, E. W. and Georgieva, I. and Grziwa, S. and Schmerling, H. and Skarka, M. and Blažek, M. and Karjalainen, M. and Špoková, M. and Isaacson, H. and Howard, A. W. and Burke, C. J. and Van Eylen, V. and Falk, B. and Fridlund, M. and Goffo, E. and Jenkins, J. M. and Korth, J. and Lissauer, J. J. and Livingston, J. H. and Luque, R. and Muresan, A. and Osborn, H. P. and Pallé, E. and Persson, C. M. and Redfield, S. and Ricker, G. R. and Seager, S. and Serrano, L. M. and Smith, A. M. S. and Kabáth, P.}}, issn = {{0004-6361}}, keywords = {{Planetary systems; Planets and satellites: Atmospheres; Planets and satellites: gaseous planets; Techniques: photometric; Techniques: radial velocities; Techniques: spectroscopic}}, language = {{eng}}, month = {{06}}, publisher = {{EDP Sciences}}, series = {{Astronomy and Astrophysics}}, title = {{TOI-1268b : The youngest hot Saturn-mass transiting exoplanet}}, url = {{http://dx.doi.org/10.1051/0004-6361/202142883}}, doi = {{10.1051/0004-6361/202142883}}, volume = {{662}}, year = {{2022}}, }