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Title:
High-Energy Particles in the Wind Nebula of Pulsar B1509-58 as Seen by INTEGRAL
Authors:
Forot, M.; Hermsen, W.; Renaud, M.; Laurent, P.; Grenier, I.; Goret, P.; Khelifi, B.; Kuiper, L.
Affiliation:
AA(Service d'Astrophysique, Commissariat à l'Energie Atomique Saclay, 91191 Gif sur Yvette, France.; AIM-UMR 7158, Commissariat à l'Energie Atomique Saclay, 91191 Gif sur Yvette, France.), AB(SRON Netherlands Institute for Space Research, Sorbonnelaan 2, 3584 CA Utrecht, Netherlands.; Astronomical Institute Anton Pannekoek, University of Amsterdam, Kruislaan 403, 1098 SJ Amsterdam, Netherlands.), AC(Service d'Astrophysique, Commissariat à l'Energie Atomique Saclay, 91191 Gif sur Yvette, France.; APC-UMR 7164, 11 Place M. Berthelot, 75231 Paris, France.), AD(Service d'Astrophysique, Commissariat à l'Energie Atomique Saclay, 91191 Gif sur Yvette, France.; APC-UMR 7164, 11 Place M. Berthelot, 75231 Paris, France.), AE(Service d'Astrophysique, Commissariat à l'Energie Atomique Saclay, 91191 Gif sur Yvette, France.; AIM-UMR 7158, Commissariat à l'Energie Atomique Saclay, 91191 Gif sur Yvette, France.), AF(Service d'Astrophysique, Commissariat à l'Energie Atomique Saclay, 91191 Gif sur Yvette, France.; AIM-UMR 7158, Commissariat à l'Energie Atomique Saclay, 91191 Gif sur Yvette, France.), AG(Laboratoire Leprince-Ringuet, IN2P3/CNRS, Ecole Polytechnique, F-91128 Palaiseau Cedex, France.), AH(SRON Netherlands Institute for Space Research, Sorbonnelaan 2, 3584 CA Utrecht, Netherlands.)
Publication:
The Astrophysical Journal, Volume 651, Issue 1, pp. L45-L48. (ApJL Homepage)
Publication Date:
11/2006
Origin:
UCP
ApJ Keywords:
Acceleration of Particles, Gamma Rays: Observations, Stars: Pulsars: Individual: Alphanumeric: PSR B1509-58, Shock Waves
DOI:
10.1086/509077
Bibliographic Code:
2006ApJ...651L..45F

Abstract

We present observations with the INTEGRAL IBIS telescope of the wind nebula powered by the young pulsar B1509-58, and we discuss the spatial and spectral properties of the unpulsed emission in the 20-200 keV energy band. The source extension and orientation along the northwest-southeast axis correspond to the jet emission seen at keV and TeV energies. The hard X-ray spectrum is consistent with the earlier BeppoSAX measurements. It follows a power law with a photon index α=-2.12+/-0.05 up to 160 keV. A possible break at this energy is found at the 2.9 σ confidence level. The 0.1-100 keV data are consistent with synchrotron aging of pairs in the jet and yield a magnetic field strength of 22-33 μG for a bulk velocity of 0.3c-0.5c. The synchrotron cutoff energy thus corresponds to a maximum electron energy of 400-730 TeV.
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