POSTER PAPER 4.07
Stellar Activity in the NGC 2451 Clusters
Matthias Huensch, Carsten Weidner
Institute: Institut fuer Theoretische Physik und Astrophysik, UniversitatKiel, Germany
Contact Email: huensch@astrophysik.uni-kiel.de
Abstract:
We present results of our combined X-ray and optical study of NGC 2451,
which actually consists of two different stellar clusters situated along
the same line-of-sight at distances of 190 and 360 pc, respectively.
Based on ROSAT X-ray observations and on our
extensive optical CCD BVR-photometry we are able to identify 113 stars
down to spectral class M as member candidates of the two NGC 2451 clusters.
Their general X-ray properties are consistent with an age
in the range 50 to 100 Myrs.
The nearer of the two clusters is especially interesting since it ranks among
the ten nearest clusters and is supposed to be of lower metallicity than
solar.
Index Keywords: NGC 2451; Open Clusters
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Manuscript submitted: 2001-Sep-05
"The Future of Cool-Star Astrophysics", 2003, Eds. A. Brown,
G. M. Harper, & T. R. Ayres.
Proceedings of 12th Cambridge Workshop on Cool Stars, Stellar Systems,
& The Sun,
© 2003 University of Colorado.