In:
International Journal of Modern Physics D, World Scientific Pub Co Pte Ltd, Vol. 17, No. 10 ( 2008-09), p. 1883-1888
Abstract:
There are three Galactic jet sources from which TeV emission has been detected: LS 5039, LS I +61 303 and Cygnus X-1. These three sources show power-law tails in X-rays and soft gamma-rays that could indicate a nonthermal origin of this radiation. In addition, all three sources apparently show correlated and complex behavior at X-ray and TeV energies. In some cases, this complex behavior is related to the orbital motion (e.g. LS 5039, LS I +61 303), and in some others it is related to some transient events occurring in the system (e.g. Cygnus X-1, and likely also LS I +61 303 and LS 5039). Based on modeling results or on energetic grounds, it seems difficult to explain the emission in the X-/soft gamma-ray and the TeV bands as coming from the same (i.e. one-zone) region. We also stress the importance of the pair creation phenomena in these systems, which harbor a massive and hot star, for the radio and the X-ray emission, as a secondary pair radiation component may be significant in these energy ranges. Finally, we point out that the presence of the star can indeed have a strong impact on both the nonthermal radiation production and the jet dynamics.
Type of Medium:
Online Resource
ISSN:
0218-2718
,
1793-6594
DOI:
10.1142/S0218271808013522
Language:
English
Publisher:
World Scientific Pub Co Pte Ltd
Publication Date:
2008
SSG:
16,12
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