A Modified Synchrotron Model for Knots in the M87 Jet

Details A Modified Synchrotron Model for Knots in the M87 Jet A Modified Synchrotron Model for Knots in the M87 Jet

2007-08-27

arxiv.org/abs/0708.3422v1

ApJ 668 (2007) L23-L26

Astronomy and Astrophysics

Astrophysics

12 pages, 1 figure, 2 tables, Accepted for publication in ApJ Letters

Scientific paper

10.1086/522601

For explaining the broadband spectral shape of knots in the M87 jet from radio through optical to X-ray, we propose a modified synchrotron model that considers the integrated effect of particle injection from different acceleration sources in the thin acceleration region. This results in two break frequencies at two sides of which the spectral index of knots in the M87 jet changes. We discuss the possible implications of these results for the physical properties in the M87 jet. The observed flux of the knots in the M87 jet from radio to X-ray can be satisfactorily explained by the model, and the predicted spectra from ultraviolet to X-ray could be further tested by future observations. The model implies that the knots D, E, F, A, B, and C1 are unlikely to be the candidate for the TeV emission recently detected in M87.

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