The parsec-scale jet of PKS 0637-752

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Title: The parsec-scale jet of PKS 0637-752
Author(s): Edwards, Philip G.; Piner, B. Glenn; Tingay, Steven J.; Lovell, James E. J.; Kataoka, Jun; Ojha, Roopesh; Murata, Yasuhiro
Abstract: Chandra observations of the quasar PKS 0637-752 during its checkout phase resulted in the unexpected detection of a luminous kiloparsec-scale X-ray jet. The apparent superluminal speed of this jet on the parsec-scale, based on two VSOP and four ground-based observations, has proven crucial to understanding the X-ray production in the arcsec-scale jet. We present here for the first time the full details of the ground-based observations used to determine the parsec-scale jet speed, describe the results of a third VSOP observation, and examine the reported jet speed in the light of more recent ground-based VLBI observations. We find some evidence of increased source activity coincident with extrapolated epochs of jet component ejection, although the monitoring of the source is relatively sparse and the ejection epochs are not tightly constrained. We also construct the spectral energy distribution for the nucleus of PKS 0637-752 and show that it can be modelled well in terms of a one-zone synchrotron self-Compton model of an electron-positron jet with a Doppler factor of ~10, consistent with the results of the VLBI observations.
Publication type: Journal article
Research centre: Swinburne University of Technology. Faculty of Information and Communication Technologies. Centre for Astrophysics and Supercomputing
Source: Publications of the Astronomical Society of Japan, Vol. 58, no. 2 (2006), p. 233-241
Publication year: 2006
Keyword(s): Galaxies; Quasars; PKS 0637-752; Radio continuum; Interferometric techniques
Publisher: Astronomical Society of Japan
Format: 233-241
ISSN: 0004-6264
Publisher URL: http://pasj.asj.or.jp/v58/n2/580204/580204a.html
Peer reviewed