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Título: | The Cavity of 3CR 196.1: Hα Emission Spatially Associated with an X-Ray Cavity |
Autor: | Jimenez-Gallardo, A.; Sani, E.; Ricci, Federica; Mazzucchelli, C.; Balmaverde, B.; Massaro, F.; Capetti, A.; Forman, W. R.; Kraft, R. P.; Venturi, G.; Gendron-Marsolais, Marie-Lou; Prieto, M. A.; Marconi, A.; Peña-Herazo, H. A.; Baum, S. A.; O'Dea, C. P.; Lovisari, L.; Gilli, R.; Torresi, E.; Paggi, A.; Missaglia, V.; Tremblay, G. R.; Wilkes, B. J. | Fecha de publicación: | 15-dic-2022 | Editor: | IOP Publishing | Citación: | Astrophysical Journal 941(2): 114 (2022) | Resumen: | We present a multifrequency analysis of the radio galaxy 3CR 196.1 (z=0.198), associated with the brightest galaxy of the cool-core cluster CIZAJ0815.4-0303. This nearby radio galaxy shows a hybrid radio morphology and an X-ray cavity, all signatures of a turbulent past activity, potentially due to merger events and active galactic nuclei (AGN) outbursts. We present results of the comparison between Chandra and Very Large Telescope Multi-Unit Spectroscopic Explorer data for the inner region of the galaxy cluster, on a scale of tens of kpc. We discovered Hα + [N ii]λ6584 emission spatially associated with the X-ray cavity (at ∼10 kpc from the galaxy nucleus) instead of with its rim. This result differs from previous discoveries of ionized gas surrounding X-ray cavities in other radio galaxies harbored in galaxy clusters and could represent the first reported case of ionized gas filling an X-ray cavity, either due to different AGN outbursts or to the cooling of warm (104 < T ≤ 107 K) AGN outflows. We also found that the Hα, [N ii]λλ6548, 6584, and [S ii]λλ6718, 6733 emission lines show an additional redward component, at ∼1000 km s−1 from rest frame, with no detection in Hβ or [O iii]λλ4960, 5008. We believe the most likely explanation for this redward component is the presence of a background gas cloud as there appears to be a discrete difference of velocities between this component and the rest frame. © 2022. The Author(s). Published by the American Astronomical Society. | Descripción: | This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. | Versión del editor: | http://dx.doi.org/10.3847/1538-4357/aca08b | URI: | http://hdl.handle.net/10261/296723 | DOI: | 10.3847/1538-4357/aca08b | ISSN: | 0004-637X | E-ISSN: | 1538-4357 |
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2022ApJ...941..114J.pdf | 2,85 MB | Adobe PDF | Visualizar/Abrir |
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