Matches in SemOpenAlex for { <https://semopenalex.org/work/W4367672456> ?p ?o ?g. }
- W4367672456 endingPage "A132" @default.
- W4367672456 startingPage "A132" @default.
- W4367672456 abstract "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 M J , and a radius of 0.99 ± 0.16 R J . 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." @default.
- W4367672456 created "2023-05-03" @default.
- W4367672456 creator A5072010895 @default.
- W4367672456 creator A5080879658 @default.
- W4367672456 creator A5082412132 @default.
- W4367672456 creator A5083512311 @default.
- W4367672456 creator A5089361209 @default.
- W4367672456 date "2023-06-01" @default.
- W4367672456 modified "2023-09-27" @default.
- W4367672456 title "The GAPS programme at TNG" @default.
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