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Variability in the X-ray Flux of Quasar 3C345: Inverse-Compton Emission from the Parsec-Scale Jet?

Unwin, S. C. and Wehrle, A. E. and Zensus, J. A. and Lobanov, A. P. (1996) Variability in the X-ray Flux of Quasar 3C345: Inverse-Compton Emission from the Parsec-Scale Jet? In: Blazar Continuum Variability. ASP Conference Series. No.110. Astronomical Society of the Pacific , San Francisco, CA, pp. 317-322. ISBN 1-886733-30-9.

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We present the results of the first systematic study of variability in the X-ray emission from the 'superluminal' quasar 3C 345. Its power-law 1-keV X-ray emission varies by a factor of two on a timescale of years, but with no change in spectral index, closely following the high-frequency radio flux. Using VLBI images, we show that one of the superluminal 'knots' in the jet (at a distance of ≈ 15 pc from the nucleus), rather than the nucleus, produces most of the observed X-rays, via the synchrotron self-Compton process. We show that this knot accelerates as it moves away from the nucleus, along along a path at ≈ 10° from the line of sight.

Item Type:Book Section
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Additional Information:© 1996 Astronomical Society of the Pacific. Provided by the NASA Astrophysics Data System. We are grateful to Hugh and Margo Aller (U. Michigan), and Harri Teräsranta (U. Helsinki) for providing radio data in advance of publication. Greg Madejski (GSFC) helped with systematic analysis of the ROSAT data.
Group:Space Radiation Laboratory
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Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1996-17
Series Name:ASP Conference Series
Issue or Number:110
Record Number:CaltechAUTHORS:20140703-214604613
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46833
Deposited By: Deborah Miles
Deposited On:24 Jul 2014 23:31
Last Modified:03 Oct 2019 06:46

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