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Title:
Is every quasar beamed?
Authors:
Barthel, Peter D.
Affiliation:
AA(Owens Valley Radio Observatory, Pasadena, CA)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 336, Jan. 15, 1989, p. 606-611. (ApJ Homepage)
Publication Date:
01/1989
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Quasars, Radio Jets (Astronomy), Relativistic Electron Beams, Continuous Radiation, Interacting Galaxies, Radio Galaxies, Red Shift
DOI:
10.1086/167038
Bibliographic Code:
1989ApJ...336..606B

Abstract

A companion paper (Barthel et al.) reports the discovery of superluminal motion in the core of 4C 34.47, the largest known quasi-stellar radio source. Superluminal motion, the apparent continuity of small- and large-scale one-sided radio jets, and the recently established depolarization asymmetry in luminous quasars find a natural explanation in the effects of relativistic beaming. In the frameworkof of this relativistic beaming model, the available data imply that all radio-loud quasars are beamed toward the earth. Powerful radio galaxies may well form the unbeamed parent population. Radio-quiet QSOs and powerful infrared galaxies can be unified using similar orientation effects.

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