The MAVERIC Survey: Chandra/ACIS Catalog of Faint X-Ray Sources in 38 Galactic Globular Clusters

摘要

Globular clusters host a variety of lower-luminosity (L _(X)??10~(33) erg?s~(?1). Among these moderately bright systems, we discover a new source in NGC?6539 that may be a candidate accreting stellar-mass BH or a transitional MSP. We show that quiescent NS low-mass X-ray binaries in GCs may spend ～2% of their lifetimes as transitional MSPs in their active (L _(X)?>?10~(33) erg?s~(?1)) state. Finally, we identify a substantial underabundance of bright (L _(X)?>?10~(33) erg?s~(?1)) intermediate polars in GCs compared to the Galactic field, in contrast with the literature of the past two decades.