| Título: | The CARMENES search for exoplanets around M dwarfs: different roads to radii and masses of the target stars |
| Autores: | Schweitzer, A. ; Passegger, V.M: ; Cifuentes, C. ; Béjar, V.J.S. ; Cortés Contreras, Miriam ; Caballero, J. A. ; Burgo, C. del ; Czesla, S. ; Kürster, M. ; Montes, D. ; Zapatero Osorio, M.R. ; Ribas, I. ; Reiners, A. ; Quirrenbach, A. ; Amado, P.J. ; Aceituno, J. ; Anglada Escudé, G. ; Bauer, F.F. ; Dreizler, S. ; Jeffers, S.V. ; Guenther, E.W. ; Henning, T. ; Kaminski, A. ; Lafarga, M. ; Marfil, E. ; Morales, J.C. ; Schmitt, J.H.M.M. ; Seifert, W. ; Solano, E. ; Tabernero, H.M. ; Zechmeister, M. |
| Tipo de documento: | texto impreso |
| Editorial: | EDP SCIENCES S A, 2019-05 |
| Dimensiones: | application/pdf |
| Nota general: | info:eu-repo/semantics/openAccess |
| Idiomas: | |
| Palabras clave: | Estado = Publicado , Materia = Ciencias: Física: Astrofísica , Tipo = Artículo |
| Resumen: |
Aims. We determine the radii and masses of 293 nearby, bright M dwarfs of the CARMENES survey. This is the first time that such a large and homogeneous high-resolution (R > 80, 000) spectroscopic survey has been used to derive these fundamental stellar parameters. Methods. We derived the radii using Stefan-Boltzmann’s law. We obtained the required effective temperatures T_(eff) from a spectral analysis and we obtained the required luminosities L from integrated broadband photometry together with the Gaia DR2 parallaxes. The mass was then determined using a mass-radius relation that we derived from eclipsing binaries known in the literature. We compared this method with three other methods: (1) We calculated the mass from the radius and the surface gravity log g, which was obtained from the same spectral analysis as T_(eff). (2) We used a widely used infrared mass-magnitude relation. (3) We used a Bayesian approach to infer stellar parameters from the comparison of the absolute magnitudes and colors of our targets with evolutionary models. Results. Between spectral types M0 V and M7 V our radii cover the range 0.1 R? |
| En línea: | https://eprints.ucm.es/57036/1/cortescontreras21preprint.pdf |
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