SIMBAD references

2006ApJ...648..900J - Astrophys. J., 648, 900-909 (2006/September-2)

New Chandra observations of the jet in 3C 273. I. Softer X-ray than radio spectra and the X-ray emission mechanism.


Abstract (from CDS):

The jet in 3C 273 is a high-power quasar jet with radio, optical, and X-ray emission, whose size and brightness allow a detailed study of the emission processes acting in it. We present deep Chandra observations of this jet and analyze the spectral properties of the jet emission from radio through X-rays. We find that the X-ray spectra are significantly softer than the radio spectra in all regions of the bright part of the jet, except for the first bright ``knot A'', ruling out a model in which the X-ray emission from the entire jet arises from beamed inverse Compton scattering of cosmic microwave background photons in a single-zone jet flow. Within two-zone jet models, we find that a synchrotron origin for the jet's X-rays requires fewer additional assumptions than an inverse Compton model, especially if velocity shear leads to efficient particle acceleration in jet flows.

Abstract Copyright:

Journal keyword(s): Acceleration of Particles - Galaxies: Jets - Galaxies: Quasars: Individual: Alphanumeric: 3C 273 - Radiation Mechanisms: Nonthermal - X-Rays: Galaxies

CDS comments: Knots in the 3C 273 jet follow the [LNH84] nomenclature. Parag. 5 : PKS 1150+497 is 4C49.22.

Simbad objects: 13

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