Rosat observations of pleiades flare stars

Autor:	J. Krautter, V. V. Hambaryan, Ralph Neuhäuser, R. Wichmann, L. V. Mirzoyan
Rok vydání:	1997
Předmět:	Physics education.field_of_study K-type main-sequence star Population Flare star Astronomy Astronomy and Astrophysics Astrophysics law.invention Stars law ROSAT Cluster (physics) education Pleiades Flare
Zdroj:	Astrophysics. 40:354-362
ISSN:	1573-8191 0571-7256
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::be4b7ca1042d003af4f3a05f13f1322e https://doi.org/10.1007/bf03036024 Zobrazit plný text záznamu Full text from SpringerLink