Raining in MKW 3 s: A Chandra-MUSE Analysis of X-Ray Cold Filaments around 3CR 318.1
Date Issued
2021
Author(s)
Jimenez-Gallardo, A.
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Forman, W. R.
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Kraft, R. P.
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Mahatma, V. H.
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Mazzucchelli, C.
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Missaglia, V.
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Ricci, F.
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Venturi, G.
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Baum, S. A.
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O'Dea, C. P.
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Prieto, M. A.
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Röttgering, H. J. A.
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Sani, E.
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Sparks, W. B.
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Tremblay, G. R.
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van Weeren, R. J.
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Wilkes, B. J.
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Harwood, J. J.
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Mazzotta, P.
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Kuraszkiewicz, J.
Abstract
We present the analysis of X-ray and optical observations of gas filaments observed in the radio source 3CR 318.1, associated with NGC 5920, the brightest cluster galaxy (BCG) of MKW 3 s, a nearby cool core galaxy cluster. This work is one of the first X-ray and optical analyses of filaments in cool core clusters carried out using MUSE observations. We aim at identifying the main excitation processes responsible for the emission arising from these filaments. We complemented the optical VLT/MUSE observations, tracing the colder gas phase, with X-ray Chandra observations of the hotter highly ionized gas phase. Using the MUSE observations, we studied the emission line intensity ratios along the filaments to constrain the physical processes driving the excitation, and, using the Chandra observations, we carried out a spectral analysis of the gas along these filaments. We found a spatial association between the X-ray and optical morphology of these filaments, which are colder and have lower metal abundance than the surrounding intracluster medium (ICM), as already seen in other BCGs. Comparing with previous results from the literature for other BCGs, we propose that the excitation process that is most likely responsible for these filaments emission is a combination of star formation and shocks, with a likely contribution from self-ionizing, cooling ICM. Additionally, we conclude that the filaments most likely originated from AGN-driven outflows in the direction of the radio jet.
Volume
912
Issue
2
Start page
L25
Issn Identifier
2041-8205
Ads BibCode
2021ApJ...912L..25J
Rights
open.access
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