Millisecond Pulsars and Core Collapse in the Globular Cluster NGC 6752

Physics

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Chandra Proposal Id #07400618

Scientific paper

We propose 40 ksec Chandra observations of the globular cluster NGC 6752, which when added to archival observations will improve our limiting sensitivity to faint millisecond pulsars (MSPs) by a factor of two. NGC 6752, with five known MSPs, is the only cluster (besides 47 Tuc) where more than two known MSPs can be effectively studied in the X-ray. Our goals are to: (1) Measure the X-ray luminosity function of MSPs in NGC 6752. (2) Increase our understanding of core collapse in globular clusters by a deeper study of all the X-ray populations. (3) Place stringent upper limits on the accretion luminosity of a possible intermediate-mass black hole within the core of NGC 6752. Due to crowding in the dense cluster center, only Chandra can achieve these objectives.

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