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Title:
Probing Binary Evolution Using the Pulsar Fossil Record
Authors:
Ferdman, Robert D.; Stairs, I. H.; Kramer, M.; McLaughlin, M. A.; Faulkner, A.; Backer, D. C.; Demorest, P.; Nice, D. J.; Burgay, M.; Camilo, F.; D'Amico, N.; Hobbs, G.; Lorimer, D. R.; Lyne, A. G.; Manchester, R.; Possenti, A.
Affiliation:
AA(University of British Columbia, Canada), AB(University of British Columbia, Canada), AC(Jodrell Bank Observatory, United Kingdom), AD(West Virginia University), AE(Jodrell Bank Observatory, United Kingdom), AF(University of California), AG(University of California), AH(Bryn Mawr College), AI(INAF, Italy), AJ(Columbia University), AK(INAF, Italy), AL(ATNF, Australia), AM(West Virginia University), AN(Jodrell Bank Observatory, United Kingdom), AO(ATNF, Australia), AP(INAF, Italy)
Publication:
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #115.02; Bulletin of the American Astronomical Society, Vol. 38, p.1065
Publication Date:
12/2006
Origin:
AAS
Bibliographic Code:
2006AAS...20911502F

Abstract

The Parkes Multibeam Pulsar Survey has yielded a significant number of very interesting binary and millisecond pulsars. Two of these objects are part of an ongoing timing study at the Green Bank Telescope (GBT). PSR J1756-2251 is a double-neutron star (DNS) binary system. Its orbital properties show it to be a similar system to PSR B1913+16, the original binary pulsar system discovered by Hulse and Taylor. Mass measurements of this system thus provide another important opportunity to test the validity of General Relativity, and to study the evolutionary history of DNS systems. PSR J1802-2124 is part of the relatively new and unstudied "intermediate-mass" class of binary pulsars. These typically spin with periods in the tens of milliseconds, and often have relatively massive (> 0.7 solar masses) white dwarf companions. GBT observations over the past two years have enabled us to detect the Shapiro delay in this system. This has led to the determination of the individual masses of the neutron star and white dwarf companion, providing constraints on the mass-transfer history in this unusual system.
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