HST imaging of the dusty filaments and nucleus swirl in NGC4696 at the centre of the Centaurus Cluster

Fabian, A.C. and Walker, S.A. and Russell, H.R. and Pinto, C. and Canning, R.E.A. and Salome, P. and Sanders, J.S. and Taylor, G.B. and Zweibel, E.G. and Conselice, C.J. and Combes, F. and Crawford, C.S. and Ferland, G.J. and Gallager, J.S. and Hatch, Nina A. and Johnstone, R.M. and Reynolds, C.S. (2016) HST imaging of the dusty filaments and nucleus swirl in NGC4696 at the centre of the Centaurus Cluster. Monthly Notices of the Royal Astronomical Society, 461 (1). pp. 922-928. ISSN 1365-2966

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Narrow-band HST imaging has resolved the detailed internal structure of the 10 kpc diameter H α+[N II] emission line nebulosity in NGC4696, the central galaxy in the nearby Centaurus cluster, showing that the dusty, molecular, filaments have a width of about 60 pc. Optical morphology and velocity measurements indicate that the filaments are dragged out by the bubbling action of the radio source as part of the active galactic nucleus feedback cycle. Using the drag force we find that the magnetic field in the filaments is in approximate pressure equipartition with the hot gas. The filamentary nature of the cold gas continues inwards, swirling around and within the Bondi accretion radius of the central black hole, revealing the magnetic nature of the gas flows in massive elliptical galaxies. HST imaging resolves the magnetic, dusty, molecular filaments at the centre of the Centaurus cluster to a swirl around and within the Bondi radius.

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly notices of the Royal Astronomical Society ©2016 The authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Keywords: black hole physics, galaxies:clusters:individual:GGC4696, galaxies:clusters:intracluster medium, x-rays:galaxies
Schools/Departments: University of Nottingham UK Campus > Faculty of Science > School of Physics and Astronomy
Identification Number: https://doi.org/10.1093/mnras/stw1350
Depositing User: Eprints, Support
Date Deposited: 28 Sep 2016 14:23
Last Modified: 29 Sep 2016 10:23
URI: http://eprints.nottingham.ac.uk/id/eprint/37221

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