XMM-Newton Proposal 02017302

Details XMM-Newton Proposal 02017302 XMM-Newton Proposal 02017302

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003xmm..prop...93p&link_type=abstract

XMM-Newton Proposal ID #02017302

Computer Science

Ngc 6633, Ngc 6633, Xmm-Newton Proposal 02017302

Scientific paper

We propose deep EPIC surveys of the Hyades-age open star clusters NGC 6633 and IC 4756. These are the only such clusters with relatively small angular diameter (less than about 1 deg.) within 800 pc. The 50ks exposures will reach below the median X-ray luminosities seen in the Hyades, even for dM stars, and (1) allow definitive inter- and intra-cluster comparisons; (2) probe the magnetic dynamo down to at least mid-M in each cluster. The NGC 6633 observations will complement our ongoing optical programme; we have now surveyed the cluster to late-M. NGC 6633 is the most iron-poor of the Hyades-age clusters and hence the most crucial when looking for composition effects.

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