Journal Article

The dynamics and environmental impact of 3C 452

D. L. Shelton, M. J. Hardcastle and J. H. Croston

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 418, issue 2, pages 811-819
Published in print December 2011 | ISSN: 0035-8711
Published online November 2011 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2011.19533.x
The dynamics and environmental impact of 3C 452

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We present a detailed analysis of a new XMM–Newton observation of the Fanaroff–Riley type II (FR II) radio galaxy 3C 452 and its environment. We detect X-ray emission from the hot intragroup medium and measure its temperature as well as obtaining the surface brightness and pressure profiles. We provide evidence that 3C 452 is currently heating its environment, measuring a temperature of 1.18 ± 0.11 keV for the immediate environment of the radio source compared to 0.86+0.13− 0.05 keV for the outer environment. We also present evidence that the outer regions of the lobes are overpressured (internal pressure of 2.6 × 10−13 Pa and external pressure of 1.11 ± 0.11 × 10−13 Pa at the edge of the lobes) and therefore are driving a shock at the lobe edges (with a temperature which we constrain to be 1.7+0.9− 0.5 keV), while the inner regions of the lobes are underpressured and contracting. Taking into account the very large amount of energy stored in the lobes, we show that this relatively low powered FR II radio galaxy will have an extremely significant impact on its group environment.

Keywords: galaxies: active; galaxies: individual: 3C 452; galaxies: ISM; X-rays: galaxies

Journal Article.  6438 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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