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Title:
The inner jet of radio galaxy NGC 315 as observed with Chandra and the Very Large Array
Authors:
Worrall, D. M.; Birkinshaw, M.; Laing, R. A.; Cotton, W. D.; Bridle, A. H.
Affiliation:
AA(Department of Physics, University of Bristol, Tyndall Avenue, Bristol BS8 1TL), AB(Department of Physics, University of Bristol, Tyndall Avenue, Bristol BS8 1TL), AC(European Southern Observatory, Karl-Schwarzschild-Straße 2, D-85748 Garching-bei-Muenchen, Germany), AD(National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903-2475, USA), AE(National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903-2475, USA)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 380, Issue 1, pp. 2-14. (MNRAS Homepage)
Publication Date:
09/2007
Origin:
MNRAS
MNRAS Keywords:
radiation mechanisms: non-thermal , galaxies: active , galaxies: individual: NGC315 , galaxies: jets , radio continuum: general , X-rays: galaxies
Abstract Copyright:
(c) 2007 The Authors. Journal compilation © 2007 RAS
DOI:
10.1111/j.1365-2966.2007.11998.x
Bibliographic Code:
2007MNRAS.380....2W

Abstract

We present Chandra X-ray results for the jet, nucleus and gaseous atmosphere of NGC315, a nearby radio galaxy whose jet kinematics are known through deep radio mapping. Diffuse X-ray synchrotron emission is detected from the jet out to 30 arcsec from the nucleus, through regions both of fast bulk flow and deceleration. The X-ray-to-radio flux ratio drops considerably where the flow decelerates, but the X-ray and radio emissions show similar transverse extents throughout, requiring distributed particle acceleration to maintain the supply of X-ray-emitting electrons. A remarkable knotty filament within the jet is seen in both the radio and X-ray, contributing roughly 10 per cent of the diffuse emission along its extent at both wavelengths. No completely satisfactory explanation for the filament is found, though its oscillatory appearance, roughly aligned magnetic field and requirements for particle acceleration, suggest that it is a magnetic strand within a shear layer between fast inner and slower outer flow.
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