Physics
Scientific paper
Sep 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop.3327b&link_type=abstract
Spitzer Proposal ID #3327
Physics
Scientific paper
We request 3.1 hours of IRAC (3.6 through 8.0 mum) and MIPS (24 mum only) observations of a small sample of extragalactic hot-spots (HSs) with published sensitive radio and optical data. HSs are compact regions in the radio lobes of powerful extragalactic radio sources emitting synchrotron radiation. In these regions electrons are re-accelerated through shocks. In the last years, arcsecond resolution radio, optical and X-ray observations of hot-spots have allowed to understand and model the physics of acceleration in these regions. Infrared observations are particularly relevant since the emitting properties of the HSs in this band are almost unknown and it is in this domain that the selected hot-spots are expected to release the bulk of their synchrotron emission. The proposed observations represent a unique possibility to test the existent models of shock emission and clearly discriminate between different interpretations, in particular whether a single or multiple electron population is responsible for the broad-band synchrotron emission.
Bondi Marco
Brunetti Gianfranco
Mack Karl-Heinz
Setti Giancarlo
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