Open AccessHigh-Energy Particles in the Wind Nebula of Pulsar B1509-58 as Seen byINTEGRAL
Author(s) -
M. Forot,
W. Hermsen,
M. Renaud,
Philippe Laurent,
I. A. Grenier,
P. Goret,
B. Khélifi,
L. Kuiper
Publication year - 2006
Publication title -
the astrophysical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.376
H-Index - 489
eISSN - 1538-4357
pISSN - 0004-637X
DOI - 10.1086/509077
Subject(s) - physics , pulsar , astrophysics , nebula , jet (fluid) , pulsar wind nebula , telescope , synchrotron , photon , magnetic field , astronomy , synchrotron radiation , spectral index , nuclear physics , spectral line , optics , stars , quantum mechanics , thermodynamics
We present observations with the INTEGRAL/IBIS telescope of the wind nebulapowered by the young pulsar B1509-58 and we discuss the spatial and spectralproperties of the unpulsed emission in the 20-200 keV energy band. The sourceextension and orientation along the northwest-southeast axis corresponds to thejet emission seen at keV and TeV energies. The hard X-ray spectrum isconsistent with the earlier Beppo-SAX measurements. It follows a power law witha photon index alpha = -2.12 pm 0.05 up to 160 keV. A possible break at thisenergy is found at the 2.9 sigma confidence level. The 0.1-100 keV data areconsistent with synchrotron aging of pairs in the jet and yield a magneticfield strength of 22-33 muG for a bulk velocity of 0.3-0.5c. The synchrotroncut-off energy thus corresponds to a maximum electron energy of 400-730 TeV.Comment: 4 pages, 6 figures, accepted for publication in Ap
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