Astronomy and Astrophysics – Astronomy
Scientific paper
May 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...340..117u&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 340, May 1, 1989, p. 117-128.
Astronomy and Astrophysics
Astronomy
70
Light Speed, Quasars, Radio Jets (Astronomy), Very Long Base Interferometry, Emission Spectra, Inverse Scattering, Relativistic Velocity
Scientific paper
VLBI maps of the quasar 3C 279 have been made at 5, 11, and 22 GHz, at several epochs between 1981 and 1985, to study the varying structure of the compact radio source. Spectra derived from the maps show that the NE component has the highest turnover frequency, and thus probably represents the core of the source. By comparing the predicted inverse-Compton X-ray emission with the measured X-ray flux, lower limits to the Doppler factor are derived for the compact components. A simple model of a jet which is mildly relativistic explains both the superluminal motion and the X-ray flux.
Biretta John A.
Cohen Morrel H.
Hodges Mark W.
Unwin Stephen C.
Zensus Anton J.
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