Proper Motions in Compact Symmetric Objects

Details Proper Motions in Compact Symmetric Objects Proper Motions in Compact Symmetric Objects

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002evn..conf..139p&link_type=abstract

6th European VLBI Network Symposium on New Developments in VLBI Science and Technology, held in Bonn, June 25th-28th 2002, proce

Astronomy and Astrophysics

Astronomy

8

Scientific paper

This paper discusses recent measurements of proper motions of the hot spots of Compact Symmetric Objects. We review the evidence for lobe expansion of CSOs and its use as a methods to estimate their kinematic ages. New, refined values for the expansion velocity of hot spots are presented. The kinematic ages measured in 10 CSOs so far points to these objects being very young (< 104 years). For a few CSOs the ages have been estimated from methods used for the larger sources and agree with the kinematical ages. There is also increasing evidence that a minority of these objects are just the recent phases of recurrent emission.

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