SIMBAD references

2008ApJ...673L.139F - Astrophys. J., 673, L139-L142 (2008/February-1)

Stochastic acceleration in the western hot spot of Pictor A.

FAN Z.-H., LIU S., WANG J.-M., FRYER C.L. and LI H.

Abstract (from CDS):

Chandra's high-resolution observations of radio galaxies require a revisit of the relevant electron acceleration processes. Although the diffusive shock particle acceleration model may explain spectra of spatially unresolved sources, it encounters difficulties in explaining the structure and spectral properties of recently discovered Chandra X-ray features in several low-power radio sources. We argue that these observations strongly suggest stochastic electron acceleration by magnetized turbulence, and show that the simplest stochastic particle acceleration model with energy-independent acceleration and escape timescales can overcome most of these difficulties. We use the bright core of the western hot spot of Pictor A as an example to demonstrate the model characteristics, which may be tested with high-energy observations.

Abstract Copyright:

Journal keyword(s): Acceleration of Particles - Galaxies: Individual: Name: Pictor A - Galaxies: Jets - Radiation Mechanisms: Nonthermal

Simbad objects: 10

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