Determination of the Doppler factor of relativistic beams in radio active galactic nuclei. (I) 3C 273

Details Determination of the Doppler factor of relativistic beams in radio active galactic nuclei. (I) 3C 273 Determination of the Doppler factor of relativistic beams in radio active galactic nuclei. (I) 3C 273

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998cha%26a..22..257w&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 22, Issue 3, p. 257-267.

Astronomy and Astrophysics

Astrophysics

Scientific paper

There are shortcomings in the present available method of determining the Doppler factor δ based on a uniform model of synchrotron self-Compton mechanism and linking the observed fluxes at individual points of the radio and X-ray spectra. In this paper we develop a new model which is nonuniform and uses the entire radio and X spectra. We applied this new model to 3C 273. We found δ ~ 31.3 and a jet inclination θ ~ 1.5°. Hence we deduce an intrinsic brightness temperature of ~ 1.5 × 1010 K, so alleviating the difficulty of ``Compton catastrophe''. Our determination of δ being based on a more realistic nonuniform model and on a larger number of datapoints, should be more reliable.

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