Globular Cluster Ultraluminous X-ray Sources in the Furthest Early-Type Galaxies
arXiv:2211.07699 · doi:10.1093/mnras/stac3244
Abstract
Ultraluminous X-ray Sources (ULXs) in globular clusters are low mass X-ray binaries that achieve high X-ray luminosities through a currently uncertain accretion mechanism. Using archival Chandra and Hubble Space Telescope observations, we perform a volume-limited search ( 70 Mpc) of 21 of the most massive () early-type galaxies to identify ULXs hosted by globular cluster (GC) candidates. We find a total of 34 ULX candidates above the expected background within 5 times the effective radius of each galaxy, with 10 of these () potentially hosted by a GC. A comparison of the spatial and luminosity distributions of these new candidate GC ULXs with previously identified GC ULXs shows that they are similar: both samples peak at a few erg/s and are typically located within a few effective radii of their host galaxies.
arXiv commentAccepted for publication in MNRAS. 10 pages, 4 figures, 5 tables
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