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Title:
Green Bank Telescope Observations of the Eclipse of Pulsar ``A'' in the Double Pulsar Binary PSR J0737-3039
Authors:
Kaspi, V. M.; Ransom, S. M.; Backer, D. C.; Ramachandran, R.; Demorest, P.; Arons, J.; Spitkovsky, A.
Affiliation:
AA(Department of Physics, McGill University, Rutherford Physics Building, 3600 University Street, Montreal, QC H3A 2T8, Canada.; Department of Physics and Center for Space Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139.; Canada Research Chair; NSERC Steacie Fellow.), AB(Department of Physics, McGill University, Rutherford Physics Building, 3600 University Street, Montreal, QC H3A 2T8, Canada.; Department of Physics and Center for Space Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139.), AC(Department of Astronomy, University of California at Berkeley, 601 Campbell Hall, Berkeley, CA 94720.), AD(Department of Astronomy, University of California at Berkeley, 601 Campbell Hall, Berkeley, CA 94720.), AE(Department of Astronomy, University of California at Berkeley, 601 Campbell Hall, Berkeley, CA 94720.), AF(Department of Astronomy, University of California at Berkeley, 601 Campbell Hall, Berkeley, CA 94720.; Theoretical Astrophysics Center and Department of Physics, University of California at Berkeley, 601 Campbell Hall, Berkeley, CA 94720.), AG(KIPAC, Stanford University, P.O. Box 20450, MS 29, Stanford, CA 94309.; Theoretical Astrophysics Center and Department of Physics, University of California at Berkeley, 601 Campbell Hall, Berkeley, CA 94720.; Chandra Fellow.)
Publication:
The Astrophysical Journal, Volume 613, Issue 2, pp. L137-L140. (ApJL Homepage)
Publication Date:
10/2004
Origin:
UCP
ApJ Keywords:
Stars: Binaries: Eclipsing, Stars: Binaries: General, Stars: Pulsars: General, Stars: Pulsars: Individual: Alphanumeric: PSR J0737-3039A, Stars: Neutron
DOI:
10.1086/425128
Bibliographic Code:
2004ApJ...613L.137K

Abstract

We report on the first Green Bank Telescope observations at 427, 820, and 1400 MHz of the newly discovered, highly inclined, and relativistic double pulsar binary. We focus on the brief eclipse of PSR J0737-3039A, the faster pulsar, when it passes behind PSR J0737-3039B. We measure a frequency-averaged eclipse duration of 26.6+/-0.6 s or 0.00301+/-0.00008 in orbital phase. The eclipse duration is found to be significantly dependent on radio frequency, with eclipses longer at lower frequencies. Specifically, eclipse duration is well fitted by a linear function having slope (-4.52+/-0.03)×10-7 orbits MHz-1. We also detect significant asymmetry in the eclipse. Eclipse ingress takes 3.51+/-0.99 times longer than egress, independent of radio frequency. In addition, the eclipse lasts (40+/-7)×10-5 in orbital phase longer after conjunction, also independent of frequency. We detect significant emission from the pulsar on short timescales during eclipse in some orbits. We discuss these results in the context of a model in which the eclipsing material is a shock-heated plasma layer within the slower PSR J0737-3039B's light cylinder, where the relativistic pressure of the faster pulsar's wind confines the magnetosphere of the slower pulsar.
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