| Issue |
A&A
Volume 399, Number 3, March I 2003
|
|
|---|---|---|
| Page(s) | 919 - 929 | |
| Section | Galactic structure, stellar clusters, and populations | |
| DOI | https://doi.org/10.1051/0004-6361:20021818 | |
| Published online | 14 February 2003 | |
The X-ray Luminosity Distributions of the high-metallicity open cluster Blanco 1
1
Dipartimento di Scienze Fisiche e Astronomiche, Sezione di Astronomia, Università di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy e-mail: pilli@astropa.unipa.it
2
INAF – Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy e-mail: giusi@astropa.unipa.it, sciorti@astropa.unipa.it
3
Astrophysics Division, Research & Scientific Support Department of ESA, ESTEC, Postbus 299, 2200 AG Noordwijk, The Netherlands e-mail: fabio.favata@rssd.esa.int
Corresponding author: I. Pillitteri, pilli@astropa.unipa.it
Received:
22
October
2001
Accepted:
10
October
2002
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, NGC 2516 and α Per suggests a possible metallicity effect in dM stars.
Key words: X-ray: stars / stars: activity / open clusters and associations: individual: Blanco 1
© ESO, 2003
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