Flare stars among K dwarfs members of young stellar kinematic groups

Details Flare stars among K dwarfs members of young stellar kinematic groups Flare stars among K dwarfs members of young stellar kinematic groups

Mar 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.560..825m&link_type=abstract

Proceedings of the 13th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun, held 5-9 July, 2004 in Hamburg, Germany.

Physics

2

Stars: Chromospheres, Stars: Flares, Stars: Activity

Scientific paper

During the last years (1999 - 2004), our group has been studying the spectroscopic properties of a large sample of stars members of the young stellar kinematic 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). The high resolution spectroscopic observations used in this study allow us to better determine radial velocities, chromospheric activity and lithium abundance of these objects. The chromospheric activity level of these stars has been analysed using the information provided for several optical spectroscopic features (from the Ca II H & K to Ca II IRT lines). Here we report the detection of flare and flare-like events in some of the K dwarfs of the sample such as PW And, BD+17 232, BD+20 1790, DK Leo, and FP Cnc.

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