Astronomy and Astrophysics – Astronomy
Scientific paper
May 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...444l..21b&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 444, no. 1, p. L21-L24
Astronomy and Astrophysics
Astronomy
32
Active Galactic Nuclei, Blazars, Gamma Rays, Quasars, Radio Jets (Astronomy), Radio Observation, Variability, Data Correlation, Image Analysis, Luminosity, Radiant Flux Density, Red Shift
Scientific paper
We report detection of superluminal motion in the core of 4C 38.41, associated with the z = 1.814 quasar 1633 + 382. The dominant nucleus in the approximately 30 kpc triple morphology of the radio source displays a core-jet structure on the milliarcsecond scale, and a jet component is found moving outward at 6.1/hc (H0 = 100 h/km/s/Mpc, q0 = 0.5). Quasar 1633 + 382 is a highly variable object, in both the radio and the optical wavebands, and in addition an extremely luminous gamma-ray emitter. It is the ninth gamma-ray blazar displaying superluminal motion. We point out that all gamma-ray active galactic nuclei (AGNs) which have been observed with VLBI sufficiently well have been found to show superluminal expansion. This provides strong support for the commonly accepted hypothesis that AGN gamma-ray emission is produced in a beamed relativistic jet.
Barthel Peter D.
Conway John E.
Myers Steven T.
Pearson Timothy. J.
Readhead Anthony C. S.
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