Other
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21721502p&link_type=abstract
American Astronomical Society, AAS Meeting #217, #215.02; Bulletin of the American Astronomical Society, Vol. 43, 2011
Other
Scientific paper
Millisecond pulsars (MSPs) have recently been confirmed by the Fermi Large Area Telescope as a class of pulsed gamma-ray emitters. They have been observed individually contributing to the population of high latitude gamma-ray sources, and suggested to explain the gamma-ray emission of globular clusters as a collective emission. We will present the first detection of gamma-ray pulsations from a globular cluster MSP, PSR J1823-3021A in NGC 6624. The pulsar has an unusually large period derivative and is one of the most energetic MSPs detected in gamma-rays (spin-down luminosity of 8E35 erg/s). It is located 7.9 kpc away in the core of the cluster, which includes three other MSPs, two normal pulsars, and the bright X-ray source 4U 1823-30. We will present the environment and pulsed gamma-ray emission which appears to be aligned with radio peaks, a phenomenon only seen in 3 MSP to date.
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