Induced Compton Scattering in Gigahertz Peak Spectrum Sources

Abstract

We revisit the shocked shell model for the class of Active Galactic Nuclei known as Gigahertz Peak Spectrum sources, incorporating new observational data on the radiation brightness temperatures. We argue that in addition to free-free absorption, induced Compton scattering will also have an important effect in forming the ~GHz peak and in shaping the radio spectra that characterize these sources. Indeed, our arguments suggest that GPS sources may provide the first real evidence for the role of induced Compton scattering in extragalactic radio sources.

12 pages, 1 figure, AAS LaTeX style with epsf, to appear in ApJ Letters

References in corpus (1)

• X-ray Spectral Survey of WGACAT Quasars, II: Optical and Radio Properties of Quasars with Low Energy X-ray Cut-offs

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• Non-Uniform Free-Free Absorption in the GPS Radio Galaxy 0108+388
• Physical parameters in the hot spots and jets of Compact Symmetric Objects
• Numerical calculations of spectral turnover and Synchrotron Self Absorption in CSS and GPS radio sources
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• Unmasking the history of 3C 293 with LOFAR sub-arcsecond imaging
• Heating of gas inside radio sources to mildly relativistic temperatures via induced Compton scattering
• Radio Observations of the Hubble Deep Field South Region III: The 2.5, 5.2 and 8.7 GHz Catalogues and Radio Source Properties
• Extragalactic radio sources with sharply inverted spectrum at metre wavelengths
• Extremely inverted peaked spectrum radio sources