ROSAT observations of Pleiades flare stars.

Details ROSAT observations of Pleiades flare stars. ROSAT observations of Pleiades flare stars.

Oct 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997ap.....40..354h&link_type=abstract

Astrophysics, Volume 40, Issue 4, pp.354-362

Astronomy and Astrophysics

Astrophysics

1

Flare Stars: Pleiades, Flare Stars: Classification, Flare Stars: Open Clusters

Scientific paper

The X-ray data of a sample of 104 flare stars (FSs) in the Pleiades cluster region obtained by Stauffer et al. [1] on the basis of deep ROSAT PSPC observations are analyzed. If we divide the X-ray emission detected in late-type stars of the Pleiades cluster into FSs and non-FSs, we find that X-ray luminosities of stars of both groups can be considered as coming from the same parent population. Moreover, in order to classify stars in a sample of 23 late-type Pleiades stars of unknown nature discriminant analysis in a four-dimensional parameter space (log (Lx, log (Lx/Lbol), and ROSAT hardness ratios HR1 and HR2) has been used. It can be shown that the majority of these stars (16) are very likely FSs rather than non-FSs.

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