Kinematics of quasars and AGN

Details Kinematics of quasars and AGN Kinematics of quasars and AGN

Nov 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999newar..43..757k&link_type=abstract

New Astronomy Reviews, Volume 43, Issue 8-10, p. 757-760.

Astronomy and Astrophysics

Astronomy

9

Scientific paper

The VLBA has been used over a period of four years to study the internal motions within a sample of quasars and AGN. In most sources, features appear to propagate away from the central engine along a well collimated radio jet with apparent transverse velocities between zero and 10c, with some evidence for apparent accelerations and decelerations. The distribution of apparent velocity is not consistent with any simple ballistic model and appears to require either a spread in intrinsic velocity or a difference between the bulk velocity and pattern velocity. The dependence of apparent angular velocity with redshift is consistent with standard Friedmann world models. Further observations of a larger source sample, especially at large redshift may lead to meaningful constraints on world models.

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