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The Knotty Question of the Jet of PKS B1421-490


Gelbord, JM and Marshall, HL and Worrall, DM and Birkinshaw, M and Lovell, JEJ and Ojha, R and Godfrey, L and Schwartz, DA and Perlman, ES and Georganopoulos, M and Murphy, DW and Jauncey, DL, The Knotty Question of the Jet of PKS B1421-490, The Astrophysical Journal, 632, (2 II) pp. L75-L78. ISSN 0004-637X (2005) [Refereed Article]

DOI: doi:10.1086/497823


We report the discovery of unusually strong optical and X-ray emission associated with a knot in the radio jet of PKS B1421-490. The knot is the brightest feature observed beyond the radio band, with knot/core flux ratios ∼300 and 3.7 at optical and X-ray frequencies, respectively. We interpret the extreme optical output of the knot as synchrotron emission. The nature of the X-ray emission is unclear. We consider a second synchrotron component, inverse Compton emission from a relativistic, decelerating jet, and the possibility that this feature is a chance superposition of an unusual BL Lac object. © 2005. The American Astronomical Society. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Lovell, JEJ (Dr Jim Lovell)
ID Code:45349
Year Published:2005
Web of Science® Times Cited:6
Deposited By:Physics
Deposited On:2007-07-11
Last Modified:2007-07-11

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