Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/1109

Title

Identification of the new low-redshift GHz-peaked spectrum radio source and implications for the GHz-peaked spectrum class

Author(s)

Edwards, Philip G.;  Tingay, Steven J.;  Tzioumis, Anastasios K.

Abstract

The extragalactic radio source PKS B2254-367, associated with the galaxy IC 1459, is identified as a GHz-peaked spectrum (GPS) radio source. At a distance of 19 Mpc, PKS B2254-367 is one of the closest known GPS radio sources. IC 1459, NGC 1052 (18 Mpc) and NGC 6328 (56 Mpc) are the only GPS radio source host galaxies for which the detailed kinematics of the host galaxies can be studied. All three galaxies present strong evidence for merger activity, an actively fuelled black hole and high-density environments with which the radio sources interact. Although radio luminosity evolution is generally invoked to explain the apparent overabundance of GPS sources relative to radio galaxies, such strong evidence for merger-induced activity in the nuclei of nearby GPS host galaxies argues that at least some GPS radio sources are limited in their development by the effects of merger activity and the resulting likely sporadic fuelling of the central black holes and accretion discs that power the radio sources. The radio structure associated with NGC 1052 may directly suggest such a scenario.

Publication type

Journal article

Research centre

Swinburne University of Technology.School of Biophysical Sciences and Electrical Engineering. Centre for Astrophysics and Supercomputing

Source

Monthly notices of the Royal Astronomical Society, Vol. 346, no. 1 (2003), pp. 327-331

Publication year

2003

Publisher

Blackwell Publishers

Format

pp. 327-331

ISSN

0035-8711

Publisher URL

http://dx.doi.org/10.1046/j.1365-2966.2003.07098.x

Copyright

© 2003 RAS.

Peer reviewed