The Solar-Stellar Connection in the NGC 752 Open Cluster

Details The Solar-Stellar Connection in the NGC 752 Open Cluster The Solar-Stellar Connection in the NGC 752 Open Cluster

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002cxo..prop.1139s&link_type=abstract

Chandra Proposal ID #04200397

Computer Science

Chandra Proposal Id #04200397

Scientific paper

Observations of old open clusters were performed by ROSAT, but with limited sensitivity and spatial resolution. This made it possible to study the evolution of very active binaries in those clusters, but not the coronal properties of their main sequence stars. We are proposing a 140 ks ACIS-I observation of the 2 Gyr old cluster, NGC 752. We wish to compare the coronal activity of its solar-type stars with the Sun and with the 4 Gyr old stars in the M 67 cluster. NGC 752 fills in the large age gap between the Hyades and the Sun, and thus extends the coronal activity-age relation past 1 Gyr for the very first time. We will also study the coronal evolution of post-main sequence stars and cluster binaries, providing a more complete comparison of their X-ray properties up to 4 Gyr.

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