TY - JOUR
T1 - The life of central radio galaxies in clusters
T2 - AGN-ICM studies of eRASS1 clusters in the ASKAP fields
AU - Veronica, Angie
AU - Reiprich, Thomas H.
AU - Pacaud, Florian
AU - Brüggen, Marcus
AU - Koribalski, Bärbel Silvia
AU - Pasini, Thomas
AU - Vernstrom, Tessa
AU - Duchesne, Stefan William
AU - Böckmann, Kathrin
AU - Sanders, Jeremy S.
AU - Bahar, Y. Emre
AU - Balzer, Fabian
AU - Barnes, Lachlan J.
AU - Bulbul, Esra
AU - Clerc, Nicolas
AU - Craig, Jessica E. M.
AU - Comparat, Johan
AU - Dannhauer, Simon
AU - Dietl, Jakob
AU - Dolag, Klaus
AU - Ghirardini, Vittorio
AU - Grandis, Sebastian
AU - Hoang, Duy
AU - Hopkins, Andrew
AU - Igo, Zsofi
AU - Kluge, Matthias
AU - Liu, Ang
AU - Migkas, Konstantinos
AU - Moss, Vanessa
AU - Ramos-Ceja, Miriam E.
AU - Riseley, Christopher
AU - Rudnick, Lawrence
AU - Salvato, Mara
AU - Shabala, Stanislav
AU - Seppi, Riccardo
AU - Van Loon, Jacco Th
AU - Zafar, Tayyaba
AU - Zhang, Xiaoyuan
PY - 2026/1/6
Y1 - 2026/1/6
N2 - The mechanical feedback from the central active galactic nuclei (AGNs) can be crucial for balancing the radiative cooling of the intracluster medium (ICM) at the cluster centre. We aim to understand the relationship between the power of AGN feedback and the cooling of gas in the centres of galaxy clusters by correlating the radio properties of the brightest cluster galaxies (BCGs) with the X-ray properties of their host clusters. We used the catalogues from the first SRG/eROSITA All-Sky Survey (eRASS1) along with radio observations from the Australian SKA Pathfinder (ASKAP). In total, we identified 134 radio sources associated with BCGs of the 151 eRASS1 clusters located in the PS1, PS2, and SWAG-X ASKAP fields. Non-detections were treated as upper limits. We correlated the radio properties of the BCGs (radio luminosity, largest linear size/LLS, and BCG offset from the cluster centre) with the integrated X-ray luminosity of the host clusters. We utilised the concentration parameter, cR500 , to categorise the clusters into cool cores (CCs) and non-cool cores (NCCs). By combining cR500 with the BCG offset, we assessed the dynamical states of the clusters in our sample. Furthermore, we analysed the correlation between radio mechanical power and X-ray luminosity within the CC subsample. We observe a potential positive trend between LLS and BCG offset, which may hint at an environmental influence on the morphology of central radio sources. We find a weak trend suggesting that more luminous central radio galaxies are found in clusters with higher X-ray luminosity. Additionally, there is a positive but highly scattered relationship between the mechanical luminosity of AGN jets and the X-ray cooling luminosity within the CC subsample. This finding is supported by bootstrap resampling and flux-flux analyses. The correlation observed in our CC subsample indicates that AGN feedback is ineffective in high-luminosity (high-mass) clusters. At a cooling luminosity of LX,r < Rcool ≈ 5.50 × 1043 erg s−1, on average, AGN feedback appears to contribute only about 13% − 22% of the energy needed to offset the radiative losses in the ICM.
AB - The mechanical feedback from the central active galactic nuclei (AGNs) can be crucial for balancing the radiative cooling of the intracluster medium (ICM) at the cluster centre. We aim to understand the relationship between the power of AGN feedback and the cooling of gas in the centres of galaxy clusters by correlating the radio properties of the brightest cluster galaxies (BCGs) with the X-ray properties of their host clusters. We used the catalogues from the first SRG/eROSITA All-Sky Survey (eRASS1) along with radio observations from the Australian SKA Pathfinder (ASKAP). In total, we identified 134 radio sources associated with BCGs of the 151 eRASS1 clusters located in the PS1, PS2, and SWAG-X ASKAP fields. Non-detections were treated as upper limits. We correlated the radio properties of the BCGs (radio luminosity, largest linear size/LLS, and BCG offset from the cluster centre) with the integrated X-ray luminosity of the host clusters. We utilised the concentration parameter, cR500 , to categorise the clusters into cool cores (CCs) and non-cool cores (NCCs). By combining cR500 with the BCG offset, we assessed the dynamical states of the clusters in our sample. Furthermore, we analysed the correlation between radio mechanical power and X-ray luminosity within the CC subsample. We observe a potential positive trend between LLS and BCG offset, which may hint at an environmental influence on the morphology of central radio sources. We find a weak trend suggesting that more luminous central radio galaxies are found in clusters with higher X-ray luminosity. Additionally, there is a positive but highly scattered relationship between the mechanical luminosity of AGN jets and the X-ray cooling luminosity within the CC subsample. This finding is supported by bootstrap resampling and flux-flux analyses. The correlation observed in our CC subsample indicates that AGN feedback is ineffective in high-luminosity (high-mass) clusters. At a cooling luminosity of LX,r < Rcool ≈ 5.50 × 1043 erg s−1, on average, AGN feedback appears to contribute only about 13% − 22% of the energy needed to offset the radiative losses in the ICM.
KW - galaxies: active
KW - galaxies: clusters: general
KW - galaxies: clusters: intracluster medium
KW - radio continuum: galaxies
KW - X-rays: galaxies: clusters
UR - https://www.scopus.com/pages/publications/105038278832
U2 - 10.1017/pasa.2025.10131
DO - 10.1017/pasa.2025.10131
M3 - Article
AN - SCOPUS:105038278832
SN - 1323-3580
VL - 43
JO - Publications of the Astronomical Society of Australia
JF - Publications of the Astronomical Society of Australia
M1 - e001
ER -