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    Constraining radio mode feedback in galaxy clusters with the cluster radio AGNs properties to z similar to 1

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    Author
    Gupta, N; Pannella, M; Mohr, JJ; Klein, M; Rykoff, ES; Annis, J; Avila, S; Bianchini, F; Brooks, D; Buckley-Geer, E; ...
    Date
    2020-05-01
    Source Title
    Monthly Notices of the Royal Astronomical Society
    Publisher
    Oxford University Press (OUP)
    University of Melbourne Author/s
    Bianchini, Federico; Reichardt, Christian; Gupta, Nikhel
    Affiliation
    School of Physics
    Metadata
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    Document Type
    Journal Article
    Citations
    Gupta, N., Pannella, M., Mohr, J. J., Klein, M., Rykoff, E. S., Annis, J., Avila, S., Bianchini, F., Brooks, D., Buckley-Geer, E., Bulbul, E., Rosell, A. C., Kind, M. C., Carretero, J., Chiu, I., Costanzi, M., da Costa, L. N., De Vicente, J., Desai, S. ,... Zenteno, A. (2020). Constraining radio mode feedback in galaxy clusters with the cluster radio AGNs properties to z similar to 1. Monthly Notices of the Royal Astronomical Society, 494 (2), pp.1705-1723. https://doi.org/10.1093/mnras/staa832.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/251348
    DOI
    10.1093/mnras/staa832
    Open Access URL
    https://arxiv.org/pdf/1906.11388
    ARC Grant code
    ARC/DP150103208
    Abstract
    We study the properties of the Sydney University Molonglo Sky Survey (SUMSS) 843 MHz radio active galactic nuclei (AGNs) population in galaxy clusters from two large catalogues created using the Dark Energy Survey (DES): ∼11 800 optically selected RM-Y3 and ∼1000 X-ray selected MARD-Y3 clusters. We show that cluster radio loud AGNs are highly concentrated around cluster centres to z ∼ 1. We measure the halo occupation number for cluster radio AGNs above a threshold luminosity, finding that the number of radio AGNs per cluster increases with cluster halo mass as N ∝ M1.2 ± 0.1 (N ∝ M0.68 ± 0.34) for the RM-Y3 (MARD-Y3) sample. Together, these results indicate that radio mode feedback is favoured in more massive galaxy clusters. Using optical counterparts for these sources, we demonstrate weak redshift evolution in the host broad-band colours and the radio luminosity at fixed host galaxy stellar mass. We use the redshift evolution in radio luminosity to break the degeneracy between density and luminosity evolution scenarios in the redshift trend of the radio AGNs luminosity function (LF). The LF exhibits a redshift trend of the form (1 + z⁠)γ in density and luminosity, respectively, of γD = 3.0 ± 0.4 and γP = 0.21 ± 0.15 in the RM-Y3 sample, and γD = 2.6 ± 0.7 and γP = 0.31 ± 0.15 in MARD-Y3. We discuss the physical drivers of radio mode feedback in cluster AGNs, and we use the cluster radio galaxy LF to estimate the average radio-mode feedback energy as a function of cluster mass and redshift and compare it to the core (<0.1R500) X-ray radiative losses for clusters at z < 1.

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