Published May 1996
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Variability in the X-ray Flux of Quasar 3C345: Inverse-Compton Emission from the Parsec-Scale Jet?
Abstract
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.
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.Attached Files
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Additional details
- Eprint ID
- 46833
- Resolver ID
- CaltechAUTHORS:20140703-214604613
- Created
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2014-07-24Created from EPrint's datestamp field
- Updated
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2019-10-03Created from EPrint's last_modified field
- Caltech groups
- Space Radiation Laboratory
- Series Name
- ASP Conference Series
- Series Volume or Issue Number
- 110
- Other Numbering System Name
- Space Radiation Laboratory
- Other Numbering System Identifier
- 1996-17