Quasar 4C39.25 is not contracting

Details Quasar 4C39.25 is not contracting Quasar 4C39.25 is not contracting

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.314..424m&link_type=abstract

Nature (ISSN 0028-0836), vol. 314, April 4, 1985, p. 424.

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25

Extragalactic Radio Sources, Quasars, Relativistic Velocity, Very Long Base Interferometry, Astronomical Maps, Radiant Flux Density

Scientific paper

A map has been made of the quasar 4C39.25, which has been described as consisting of two components whose angular separation remains constant at about 2 marc-sec, using VLBI observations made at 3.6 cm during 1983. From the map it is concluded that Shaffer's (1984) suggestion that this source may have been contracting superluminally during 1979-82 is not correct. Three distinct components are found in the quasar structure, two separated by 2.0 marc-sec and a third, presumably new and not previously reported, situated between the other two. It is possible either that the third component is stationary and that its flux density has rapidly increased to render it visible, or that it has recently been ejected from the westernmost component.

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