Faint X-ray Sources in the Globular Cluster Terzan 5

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dc.creatorHeinke, C. O.
dc.creatorWijnands, R.
dc.creatorCohn, H. N.
dc.creatorLugger, P. M.
dc.creatorGrindlay, J. E.
dc.creatorPooley, D.
dc.creatorLewin, W. H. G.
dc.date2006-06-11
dc.date2006-06-13
dc.date.accessioned2026-07-07T10:39:16Z
dc.date.available2026-07-07T10:39:16Z
dc.descriptionWe report our analysis of a Chandra X-ray observation of the rich globular cluster Terzan 5, in which we detect 50 sources to a limiting 1.0-6 keV X-ray luminosity of 3*10^{31} ergs/s within the half-mass radius of the cluster. Thirty-three of these have L_X>10^{32} ergs/s, the largest number yet seen in any globular cluster. In addition to the quiescent low-mass X-ray binary (LMXB, identified by Wijnands et al.), another 12 relatively soft sources may be quiescent LMXBs. We compare the X-ray colors of the harder sources in Terzan 5 to the Galactic Center sources studied by Muno and collaborators, and find the Galactic Center sources to have harder X-ray colors, indicating a possible difference in the populations. We cannot clearly identify a metallicity dependence in the production of low-luminosity X-ray binaries in Galactic globular clusters, but a metallicity dependence of the form suggested by Jordan et al. for extragalactic LMXBs is consistent with our data.
dc.description15 pages, 10 figures (3 color). Resubmitted to ApJ after incorporating referee comments. v2: Added references to introduction
dc.identifierhttps://arxiv.org/abs/astro-ph/0606253
dc.identifierhttp://arxiv.org/abs/astro-ph/0606253
dc.identifierAstrophys.J.651:1098-1111,2006
dc.identifierdoi:10.1086/507884
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/180967
dc.subjectAstrophysics
dc.titleFaint X-ray Sources in the Globular Cluster Terzan 5
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