The Classification of Extragalactic X-ray Jets

Details The Classification of Extragalactic X-ray Jets The Classification of Extragalactic X-ray Jets

2010-03-04

arxiv.org/abs/1003.0976v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

4 pages; to appear in the conference proceedings: "X-Ray Astronomy 2009: Present Status, Multiwavelength Approach and Future P

Scientific paper

The overall classification of X-ray jets has clung to that prevalent in the radio: FRI vs. FRII (including quasars). Indeed, the common perception is that X-ray emission from FRI's is synchrotron emission whereas that from FRII's may be IC/CMB and/or synchrotron. Now that we have a sizable collection of sources with detected X-ray emission from jets and hotspots, it seems that a more unbiased study of these objects could yield additional insights on jets and their X-ray emission. The current contribution is a first step in the process of analyzing all of the relevant parameters for each detected component for the sources collected in the XJET website. This initial effort involves measuring the ratio of X-ray to radio fluxes and evaluating correlations with other jet parameters. For single zone synchrotron X-ray emission, we anticipate that larger values of fx/fr should correlate inversely with the average magnetic field strength (if the acceleration process is limited by loss time equals acceleration time). Beamed IC/CMB X-rays should produce larger values of fx/fr for smaller values of the angle between the jet direction and the line of sight but will also be affected by the low frequency radio spectral index.

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