Journal
ASTRONOMY & ASTROPHYSICS
Volume 399, Issue 3, Pages 919-929Publisher
E D P SCIENCES
DOI: 10.1051/0004-6361:20021818
Keywords
X-ray : stars; stars : activity; open clusters and associations : individual : Blanco I
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We present X-ray Luminosity Distributions (XLDs) of late-type members (dF, dG, dK, dM) of the Blanco 1 cluster, based on ROSAT-HRI data and new astrometric-photometric membership obtained from the GSC-II project. For the first time we present the XLD of dM stars of this cluster. The high metallicity of Blanco 1 allows us to investigate the role of chemical composition on the coronal emission of late-type stars. Comparison between X-ray Luminosity Distributions of Blanco I and Pleiades, NGC2516 and alpha Per suggests a possible metallicity effect in dM stars.
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