Physical conditions in hotspots-what the new data are telling us

Details Physical conditions in hotspots-what the new data are telling us Physical conditions in hotspots-what the new data are telling us

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003newar..47..649h&link_type=abstract

New Astronomy Reviews, Volume 47, Issue 6-7, p. 649-652.

Astronomy and Astrophysics

Astronomy

3

Scientific paper

I review the current constraints on the nature of the hotspots of FRII radio sources, and the physical conditions that obtain in them. New Chandra observations suggest that the majority of X-ray detections of hotspots are due to inverse-Compton processes, with magnetic field strengths close to the standard equipartition/minimum-energy values. However, a few broad-line objects have X-ray emission much brighter than the expected inverse-Compton level. These may be due to synchrotron emission from a second population of electrons. I discuss the advantages and disadvantages of models for the anomalous objects involving relativistic bulk motions in the hotspots.

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