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Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994hst..prop.5344b&link_type=abstract
HST Proposal ID #5344
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Hst Proposal Id #5344 Hot Stars X-Ray Binaries
Scientific paper
Our previous HST WFPC imaging uncovered 3 promising candidate optical counterparts for low luminosity X-ray sources in the nearby globular cluster NGC 6397. Identification of these sources is essential to determine their nature, evolution, and contribution to the dynamics of the clusters. Here we propose to use WFPC2 to search for counterparts to X-ray sources in two other clusters (NGC 6752 and M22 = NGC 6656) in which high spatial resultion ROSAT imaging has been carried out. Our procedure is the same as previously: we will image the cluster cores in H-alpha, R and B filters, and identify blue H-alpha bright objects. Particular aims of this study include identifying any differences in X-ray source populations which correlate with the different dynamical states of the target clusters, and exploring the possibility that some fo the sources may be quiescent neutron stars.
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