Bibcode
Suárez Mascareño, A.; Rebolo, R.; González Hernández, J. I.; Esposito, M.
Referencia bibliográfica
Monthly Notices of the Royal Astronomical Society, Volume 452, Issue 3, p.2745-2756
Fecha de publicación:
9
2015
Número de citas
133
Número de citas referidas
122
Descripción
We determine rotation periods of a sample of 48 late F-type to mid-M
dwarf stars using time series high-resolution spectroscopy of the Ca II
H&K and H α chromospheric activity indicators. We find good
agreement between the rotation periods obtained from each of these two
indicators. An empirical relationship between the level of chromospheric
emission measured by log _{10}(R^' }_HK) and the spectroscopic rotation
periods is reported. This relation is largely independent of the
spectral type and the metallicity of the stars and can be used to make a
reliable prediction of rotation periods for late K to mid-M dwarfs with
low levels of activity. For some stars in the sample, the measured
spectroscopic rotation periods coincide, or are very close, to the
orbital periods of postulated planets. In such cases, further studies
are needed to clarify whether the associated periodic radial velocity
signals reveal the existence of planets or are due to magnetic activity.