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Flare star activity in the open cluster Alpha Persei
Author(s) -
Semkov E.H.,
Tsvetkova K.P.,
Tsvetkov M.K.
Publication year - 2000
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/1521-3994(200008)321:3<161::aid-asna161>3.0.co;2-e
Subject(s) - flare , flare star , physics , astrophysics , pleiades , open cluster , stars , astronomy , star cluster , photometry (optics) , h alpha , k type main sequence star , t tauri star , spectral line , emission spectrum
Abstract The results from a flare star investigation in the open cluster Alpha Persei are presented. Photographic flare star monitoring and CCD photometry of the discovered 4 new flare stars are made. The flare star activity phenomenon is restricted to the classical flare stars (UV Ceti type) as classified in the GCVS. The V/V‐I diagramme of the members of the cluster with the locations of the considered flare stars is given. Most of the flare stars are probable cluster members. The flare frequency determined from the Rozhen flare star monitoring is very low–one flare event occurs for 38.5 hours effective observing time. Comparison with the flare activity of the Pleiades is made because of the small difference in the age and distance of the clusters.