Hidden cooling flows − IV. More details on Centaurus and the efficiency of AGN feedback in clusters

Fabian, A. C.; Ferland, G. J.; Sanders, J. S.; Russell, H. R.; McNamara, B. R.; Pinto, C.; Hlavacek-Larrondo, J.; Walker, S. A.; Ivey, L. R.; McDonald, M.

Abstract

Cooling flows are common in galaxy clusters which have cool cores. The soft X-ray emission below 1 keV from the flows is mostly absorbed by cold dusty gas within the central cooling sites. Further evidence for this process is presented here through a more detailed analysis of the nearby Centaurus cluster and some additional clusters. Predictions of JWST near and mid-infrared spectra from cooling gas are presented. [Ne vi] emission at 7.65 μm should be an important diagnostic of gas cooling between 6 and 1.5 × 105 K⁠. The emerging overall picture of hidden cooling flows is explored. The efficiency of active galactic nucleus feedback in reducing the total cooling rate in cool cores is shown to be above 50 per cent for many clusters but is rarely above 90 per cent. The reduction is mostly in outer gas. Cooling dominates in elliptical galaxies and galaxy groups which have mass flow rates below about 15 M ⊙ yr −1 and in some massive clusters where rates can exceed 1000 M ⊙ yr −1 .

Citation

Fabian, A. C., Ferland, G. J., Sanders, J. S., Russell, H. R., McNamara, B. R., Pinto, C., Hlavacek-Larrondo, J., Walker, S. A., Ivey, L. R., & McDonald, M. (2024). Hidden cooling flows − IV. More details on Centaurus and the efficiency of AGN feedback in clusters. Monthly Notices of the Royal Astronomical Society, 535(3), 2173–2188. https://doi.org/10.1093/mnras/stae2414

• Journal Article Type: Article
• Acceptance Date: Oct 18, 2024
• Online Publication Date: Oct 24, 2024
• Publication Date: 2024-12
• Deposit Date: Oct 18, 2024
• Publicly Available Date: Oct 24, 2024
• Journal: Monthly Notices of the Royal Astronomical Society
• Print ISSN: 0035-8711
• Electronic ISSN: 1365-2966
• Publisher: Oxford University Press
• Peer Reviewed: Peer Reviewed
• Volume: 535
• Issue: 3
• Pages: 2173–2188
• DOI: https://doi.org/10.1093/mnras/stae2414
• Public URL: https://nottingham-repository.worktribe.com/output/40588930
• Publisher URL: https://academic.oup.com/mnras/article/535/3/2173/7840385