Díez 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, I.; Vanaverbeke, S.; Amado, P. 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.
Bibliographical reference
Astronomy and Astrophysics, Volume 621, id.A126, 17 pp.
Description
Aims: 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 Prot 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.
Tables A.1 and A.2, and tables of the photometric measurements are only
available at the CDS via anonymous ftp to
http://cdsarc.u-strasbg.fr
(
ftp://130.79.128.5) or via
http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/621/A126
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