SCYON Abstract

Received on December 12 2002

The X-ray Luminosity Distributions of the High-Metallicity Open Cluster Blanco 1

AuthorsI. Pillitteri (1), G. Micela (2), S. Sciortino (2), F. Favata (3)
Affiliation(1) Università di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy
(2) INAF-Osservatorio Astronomico do Palermo, Palermo, Italy
(3) Astrophysics Division, Research and Scientific Support Dep. of ESA - ESTEC, The Netherlands
Accepted byAstronomy & Astrophysics
Contactpilli@astropa.unipa.it
URLhttp://www.astropa.unipa.it/Library/preprint.html
Links Blanco 1

Abstract

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 1 and Pleiades, NGC2516 and alpha Per suggests a possible metallicity effect in dM stars.