Gravitational screens and superluminal separation in quasars

Details Gravitational screens and superluminal separation in quasars Gravitational screens and superluminal separation in quasars

Jan 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...235..335c&link_type=abstract

Astrophysical Journal, Part 1, vol. 235, Jan. 15, 1980, p. 335-346.

Astronomy and Astrophysics

Astrophysics

14

Astrophysics, Extragalactic Radio Sources, Gravitational Effects, Quasars, Light Speed, Mass Ratios, Optical Paths, Relativistic Effects, Very Long Base Interferometry

Scientific paper

The differential bending of radio waves by a suitably placed 'gravitational screen' such as an intervening galaxy can lead to large magnification of the separation velocity of the components in the nuclear region of a quasar. It is suggested that the apparent superluminal separation of such components observed in some quasars by the VLBI techniques could be due to velocity magnifications of this type. The astrophysical feasibility of this explanation is critically examined, and an optical search for objects of large mass-to-light ratio en route to quasars showing superluminal separation is advocated.

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