Accès ouvert déclaré
2017
preprint
The CARMENES search for exoplanets around M dwarfs - HD 147379b: A nearby Neptune in the temperate zone of an early-M dwarf
A. Reiners, I. Ribas, M. Zechmeister, J. A. Caballero, Trifon Trifonov, S. Dreizler, J. C. Morales, L. Tal-Or, M. Lafarga, A. Quirrenbach, P. J. Amado, A. Kaminski, S. V. Jeffers, J. Aceituno, V. J. S. Béjar, J. Guàrdia, E. W. Guenther, H.-J. Hagen, D. Montes, V. M. Passegger, W. Seifert, A. Schweitzer, M. Cortés‐Contreras, M. Abril, F. J. Alonso-Floriano, M. Ammler‐von Eiff, R. Antona, G. Anglada‐Escudé, H. Anwand-Heerwart, B. Arroyo-Torres, M. Azzaro, D. Baroch, D. Barrado, F. F. Bauer, S. Becerril, D. Benítez, Z. M. Berdinas̃, G. Bergond, M. Blümcke, M. Brinkmöller, C. del Burgo, J. Cano, M. Vázquez, E. Casal, C. Cifuentes, A. Claret, J. Colomé, S. Czesla, E. Díez-Alonso, C. Feiz, M. Fernández, I. M. Ferro, B. Fuhrmeister, D. Galadí-Enríquez, Á. García-Piquer, M. L. García-Vargas, L. Gesa, V. Gómez Galera, J. I. Gónzalez Hernández, R. González-Peinado, U. Grözinger, S. Grohnert, A. Guijarro, E. de Guindos, J. Gutiérrez–Soto, A. P. Hatzes, P. H. Hauschildt, R. P. Hedrosa, J. Helmling, Th. Henning, I. Hermelo, R. Hernández Arabí, L. Hernández Castaño, F. Hernández Hernando, E. Herrero, A. Huber, P. Huke, E. N. Johnson, E. de Juan, M. Kim, R. Klein, J. Klüter, A. Klutsch, M. Kürster, F. Labarga, A. Lamert, M. Lampón, L. M. Lara, W. Laun, Ulrike Lemke, R. Lenzen, R. Launhardt, M. López del Fresno, M. J. López‐González, M. López‐Puertas, J. F. López Salas, J. López‐Santiago, R. Luque, H. Magán Madinabeitia, U. Mall, L. Mancini, H. Mandel, E. Marfil, J. A. Marín Molina, D. Maroto Fernández, E. L. Martı́n, S. Martín‐Ruiz, C. J. Marvin, Richard J. Mathar, E. Mirabet, M. E. Moreno-Raya, A. Moya, R. Mundt, E. Nagel, V. Naranjo, L. Nortmann, G. Nowak, A. Ofir, R. Oreiro, Ε. Πάλλη, J. Panduro, A. Pavlov, S. Pedraz, A. Pérez-Calpena, D. Pérez Medialdea, M. Perger, M. A. C. Perryman, M. Pluto, O. Rabaza, A. Ramón, R. Rébolo, P. Redondo, S. Reffert, S. Reinhart, P. Rhode, Hans‐Walter Rix, F. Rodler, E. Rodrı́guez, C. López, A. Rodríguez Trinidad, R.-R. Rohloff, A. Rosich, S. Sadegi, E. Sánchez-Blanco, M. Á. Sánchez Carrasco, A. Sánchez-López, J. Sanz‐Forcada, P. Sarkis, L. F. Sarmiento, Sebastian Schäfer, J. H. M. M. Schmitt, J. Schiller, P. Schöfer, E. Solano, O. Stahl, J. B. P. Strachan, Julian Stürmer, J. C. Suárez, H. M. Tabernero, Simon Tulloch, R. G. Ulbrich, G. Veredas, José Ignacio Linares, F. Vilardell, Karl Wagner, J. Winkler, V. Wolthoff, Wei Xu, F. Yan, M. R. Zapatero Osorio
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Le résumé fourni par la source
We report on the first star discovered to host a planet detected by radial velocity (RV) observations obtained within the CARMENES survey for exoplanets around M dwarfs. HD 147379 ($V = 8.9$ mag, $M = 0.58 \pm 0.08$ M$_{\odot}$), a bright M0.0V star at a distance of 10.7 pc, is found to undergo periodic RV variations with a semi-amplitude of $K = 5.1\pm0.4$ m s$^{-1}$ and a period of $P = 86.54\pm0.06$ d. The RV signal is found in our CARMENES data, which were taken between 2016 and 2017, and is supported by HIRES/Keck observations that were obtained since 2000. The RV variations are interpreted as resulting from a planet of minimum mass $m_{\rm p}\sin{i} = 25 \pm 2$ M$_{\oplus}$, 1.5 times the mass of Neptune, with an orbital semi-major axis $a = 0.32$ au and low eccentricity ($e < 0.13$). HD 147379b is orbiting inside the temperate zone around the star, where water could exist in liquid form. The RV time-series and various spectroscopic indicators show additional hints of variations at an approximate period of 21.1d (and its first harmonic), which we attribute to the rotation period of the star.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
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Les sujets associés
Stellar, planetary, and galactic studiesAstro and Planetary ScienceAstrophysics and Star Formation Studies