Computer Science
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004xmm..prop..163r&link_type=abstract
XMM-Newton Proposal ID #03049602
Computer Science
White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Psr J1614-2230, Psr J1744-3922, Xmm-Newton Proposal 03049602
Scientific paper
In a recent radio survey of unidentified EGRET sources, we discovered two very unusual binary pulsars: PSRs J1614-2230 and J1744-3922. The first source, a 3.15ms binary pulsar with a companion too massive for standard binary evolution scenarios, may become the second known gamma-ray pulsar. The second source, a 172 ms pulsar in a tight 4.6 hr orbit around a low-mass companion, is likely unrelated to the coincident EGRET source. However, it displays bizarre radio emission behavior that may indicate transient accretion. This could be the long-sought "missing link" between accretion-powered and rotation-powered neutron stars. Here we propose to test both hypotheses using brief XMM-Newton snapshots. X-ray detection of either source would be very exciting.
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