دورية أكاديمية
The GAPS programme at TNG: XLIII. A massive brown dwarf orbiting the active M dwarf TOI-5375
| العنوان: | The GAPS programme at TNG: XLIII. A massive brown dwarf orbiting the active M dwarf TOI-5375 |
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| المؤلفون: | J. Maldonado, A. Petralia, G. Mantovan, M. Rainer, A. F. Lanza, C. Di Maio, S. Colombo, D. Nardiello, S. Benatti, L. Borsato, I. Carleo, S. Desidera, G. Micela, V. Nascimbeni, L. Malavolta, M. Damasso, A. Sozzetti, L. Affer, K. Biazzo, A. Bignamini, A. S. Bonomo, F. Borsa, M. B. Lund, L. Mancini, E. Molinari, M. Molinaro |
| المساهمون: | Maldonado, J, Petralia, A, Mantovan, G, Rainer, M, Lanza, Af, Di Maio, C, Colombo, S, Nardiello, D, Benatti, S, Borsato, L, Carleo, I, Desidera, S, Micela, G, Nascimbeni, V, Malavolta, L, Damasso, M, Sozzetti, A, Affer, L, Biazzo, K, Bignamini, A, Bonomo, A, Borsa, F, Lund, Mb, Mancini, L, Molinari, E, Molinaro, M |
| سنة النشر: | 2023 |
| المجموعة: | Universitá degli Studi di Roma "Tor Vergata": ART - Archivio Istituzionale della Ricerca |
| مصطلحات موضوعية: | techniques: spectroscopic, techniques: radial velocitie, techniques: photometric, stars: late-type, planetary system, planets and satellites: fundamental parameter, Astrophysics - Solar and Stellar Astrophysic, Astrophysics - Earth and Planetary Astrophysics, Settore FIS/05 - ASTRONOMIA E ASTROFISICA |
| الوصف: | Context. Massive substellar companions orbiting active low-mass stars are rare. They, however, offer an excellent opportunity to study the main mechanisms involved in the formation and evolution of substellar objects. Aims: We aim to unravel the physical nature of the transit signal observed by the TESS space mission on the active M dwarf TOI-5375. Methods: We analysed the available TESS photometric data as well as high-resolution (R ~ 115 000) HARPS-N spectra. We combined these data to characterise the star TOI-5375 and to disentangle signals related to stellar activity from the companion transit signal in the light-curve data. We ran a Markov chain Monte Carlo analysis to derive the orbital solution and applied state-of-the-art Gaussian process regression to deal with the stellar activity signal. Results: We reveal the presence of a companion in the boundary between the brown dwarfs and the very-low-mass stars orbiting around the star TOI-5375. The best-fit model corresponds to a companion with an orbital period of 1.721564 ± 10−6 d, a mass of 77 ± 8 MJ, and a radius of 0.99 ± 0.16 RJ. Conclusions: We derive a rotation period for the host star of 1.9692 ± 0.0004 d, and we conclude that the star is very close to synchronising its rotation with the orbital period of the companion. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | info:eu-repo/semantics/altIdentifier/wos/WOS:001017237000011; volume:674; numberofpages:18; journal:ASTRONOMY & ASTROPHYSICS; https://hdl.handle.net/2108/327723Test; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85164282566 |
| DOI: | 10.1051/0004-6361/202346096 |
| الإتاحة: | https://doi.org/10.1051/0004-6361/202346096Test https://hdl.handle.net/2108/327723Test |
| حقوق: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.36CC7D7E |
| قاعدة البيانات: | BASE |
| DOI: | 10.1051/0004-6361/202346096 |
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