A study on the flux-flux and activity-rotation relationships for late-type stars members of young stellar kinematic groups
Javier López-Santiago (Universidad Complutense de Madrid)
David Montes (Universidad Complutense de Madrid)
M.José Fernández-Figueroa (Universidad Complutense de Madrid)
We present here our ongoing study on the spectroscopic properties of
the young active stars members of young moving groups Local Association
(Pleiades moving group, 20 - 150 Myr), IC 2391 supercluster (35 Myr), Ursa
Major group (Sirius supercluster, 300 Myr), Hyades supercluster (600 Myr)
and Castor moving group (200 Myr). High resolution echelle spectra of 140
late-type stars have been taken during several observing runs from
1999 - 2004. In this contribution we analyse the flux-flux and activity-rotation
relationships for the chromospherically active stars of the sample. With
this aim, each optical chromospheric activity indicator from Ca ii H
& K to infrared triplet (IRT), including Balmer series, has been used.
Both projected rotation (v sini) determined by us and photometric
period (Pphot) from the literature have been used in the
activity-rotation relationship. We discuss the different behavior of these
relationships in groups of stars with different age and the dependence on
stellar parameters of the saturated regime.
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