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Title

CARMENES input catalogue of M dwarfs: IV. New rotation periods from photometric time series

AuthorsDíez Alonso, E.; Caballero, J.A.; Montes, D.; De Cos Juez, F.J.; Dreizler, S.; Dubois, F.; Jeffers, S.V.; Lalitha, S.; Naves, R.; Reiners, A.; Ribas, Ignasi ; Vanaverbeke, S.; Amado, Pedro J. ; Béjar, V.J.S.; Cortés-Contreras, M.; Herrero, E.; Hidalgo, D.; Kürster, M.; Logie, L.; Quirrenbach, A.; Rau, S.; Seifert, W.; Schöfer, P.; Tal-Or, L.
KeywordsTechniques: photometric
Stars: rotation
Stars: late-type
Stars: activity
Issue Date2019
PublisherEDP Sciences
CitationAstronomy and Astrophysics 621:A126 (2019)
AbstractAims. The main goal of this work is to measure rotation periods of the M-type dwarf stars being observed by the CARMENES exoplanet survey to help distinguish radial-velocity signals produced by magnetic activity from those produced by exoplanets. Rotation periods are also fundamental for a detailed study of the relation between activity and rotation in late-type stars. Methods. We look for significant periodic signals in 622 photometric time series of 337 bright, nearby M dwarfs obtained by long-time baseline, automated surveys (MEarth, ASAS, SuperWASP, NSVS, Catalina, ASAS-SN, K2, and HATNet) and for 20 stars which we obtained with four 0.2-0.8 m telescopes at high geographical latitudes. Results. We present 142 rotation periods (73 new) from 0.12 d to 133 d and ten long-term activity cycles (six new) from 3.0 a to 11.5 a. We compare our determinations with those in the existing literature; we investigate the distribution of P in the CARMENES input catalogue, the amplitude of photometric variability, and their relation to v sini and pEW(Hα); and we identify three very active stars with new rotation periods between 0.34 d and 23.6 d.© ESO 2019.
URIhttp://hdl.handle.net/10261/179510
Identifiersdoi: 10.1051/0004-6361/201833316
issn: 1432-0746
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