Compton X-ray and {gamma}-ray Emission from Extended Radio Galaxies
- Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, Stanford, CA 94305 (United States)
The extended lobes of radio galaxies are examined as sources of X-ray and {gamma}-ray emission via inverse Compton scattering of 3K background photons. The Compton spectra of two exemplary examples, Fornax A and Centaurus A, are estimated using available radio measurements in the {approx}10's MHz - 10's GHz range. For average lobe magnetic fields of > or approx. 0.3-1 {mu}G, the lobe spectra are predicted to extend into the soft {gamma}-rays making them likely detectable with the GLAST LAT. If detected, their large angular extents ({approx}1 deg. and 8 deg.) will make it possible to 'image' the radio lobes in {gamma}-rays. Similarly, this process operates in more distant radio galaxies and the possibility that such systems will be detected as unresolved {gamma}-ray sources with GLAST is briefly considered.
- OSTI ID:
- 21067244
- Journal Information:
- AIP Conference Proceedings, Vol. 921, Issue 1; Conference: 1. GLAST symposium, Stanford, CA (United States), 5-8 Feb 2007; Other Information: DOI: 10.1063/1.2757334; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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