The inner radio structure of Centaurus A - Clues to the origin of the jet X-ray emission

Details The inner radio structure of Centaurus A - Clues to the origin of the jet X-ray emission The inner radio structure of Centaurus A - Clues to the origin of the jet X-ray emission

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...273..128b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 273, Oct. 1, 1983, p. 128-153. Research supported by Sandia National Labora

Astronomy and Astrophysics

Astrophysics

164

Astronomical Maps, Galactic Nuclei, Galactic Structure, Plasma Jets, Radio Galaxies, X Ray Sources, Angular Momentum, Brightness Distribution, Polarized Radiation, Pressure Distribution, Synchrotron Radiation

Scientific paper

Multifrequency (1.4 and 4.9 GHz) observations of the jet and inner lobes of the nearby radio galaxy Centaurus A (= NGC 5128) were made with the VLA. These data were used to construct maps of the total intensity and polarization at resolutions of 31arcsec×10arcsec and 3arcsec.6×1arcsec.1. The distributions of surface brightness and pressure in the jet combined with the apparent X-ray emission from the ISM of NGC 5128 indicate that the radio jet is thermally confined. A comparison of the radio structure and the optical galaxy shows that the jet in Cen A emerges nearly along the major axis of the elliptical stellar component which is parallel to the angular momentum vector of the dust lane. A detailed comparison of the X-ray and radio emission in the jet demonstrates that the knots coincide precisely at the two energies. This fact argues in favor of a common synchrotron radiation origin for the full spectrum jet emission. The implications of X-ray synchrotron radiation from γ = 8×107 electrons on models of in situ particle acceleration are briefly considered.

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