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arXiv:astro-ph/0402214 (astro-ph)
[Submitted on 10 Feb 2004 (v1), last revised 15 Mar 2004 (this version, v2)]

Title:A Search for TeV Gamma-ray Emission from the PSR B1259-63/SS2883 Binary System with the CANGAROO-II 10-m Telescope

Authors:A. Kawachi, T. Naito, J.R. Patterson, P.G. Edwards, CANGAROO-II Collaboration
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Abstract: Observations of the PSR B1259-63/SS2883 binary system using the CANGAROO-II Cherenkov telescope are reported. This nearby binary consists of a 48msec radio pulsar in a highly eccentric orbit around a Be star, and offers a unique laboratory to investigate the interactions between the outflows of the pulsar and Be star at various distances. It has been pointed out that the relativistic pulsar wind and the dense mass outflow of the Be star may result in the emission of gamma rays up to TeV energies. We have observed the binary in 2000 and 2001, 47 and 157 days after the October 2000 periastron. Upper limits at the 0.13--0.54 Crab level are obtained. A new model calculation for high-energy gamma-ray emission from the Be star outflow is introduced and the estimated gamma-ray flux considering Bremsstrahlung, inverse Compton scattering, and the decay of neutral pions produced in proton-proton interactions, is found to be comparable to the upper limits of these observations. Comparing our results with these model calculations, the mass-outflow parameters of the Be star are constrained.
Comments: 29 pages, 10 figures, accepted by ApJ
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0402214
  (or arXiv:astro-ph/0402214v2 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0402214
Journal reference: Astrophys.J. 607 (2004) 949-958
Related DOI: https://doi.org/10.1086/383604

Submission history

From: Akiko Kawachi [view email]
[v1] Tue, 10 Feb 2004 06:30:45 UTC (194 KB)
[v2] Mon, 15 Mar 2004 04:50:40 UTC (78 KB)
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