Optical Counterparts for Low-Luminosity X -ray Sources in Globular Clusters

Details Optical Counterparts for Low-Luminosity X -ray Sources in Globular Clusters Optical Counterparts for Low-Luminosity X -ray Sources in Globular Clusters

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996hst..prop.6821c&link_type=abstract

HST Proposal ID #6821

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Hst Proposal Id #6821 Binaries And Star Formation

Scientific paper

This project uses narrow band H-alpha imaging with the WFPC2 to search for optical counterparts for low-luminosity X-ray sources in the globular cluster Omega Cen. Remarkably little is known about this class of cluster X-ray sources, yet it apparently constitutes the largest known population of compact binary stars in globulars. Optical identifications are the critical first step in learning more about these systems. H-alpha imaging has a proven track record in identifying promising counterparts for low-luminosity X-ray sources in two globular clusters, NGC 6397 and NGC 6752. Optical identifications of the X-ray sources in Omega Cen will increase our database of compact, interacting binaries in clusters, allowing us to address fundamental questions about the formation of binaries and their role in cluster dynamical evolution.

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