English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Using Chandra imaging spectroscopy and Very Large Array (VLA) L-band radiomaps, we have identified radio sources at P_{1.4GHz} >=5x10^{23} W Hz^{-1} andX-ray point sources (XPSs) at L_{0.3-8keV}>=5x10^{42} erg s^{-1} in L>L*galaxies in 12 high-redshift (0.4<z<1.2) clusters of galaxies. The radiogalaxies and XPSs in this cluster sample, chosen to be consistent with ComaCluster progenitors at these redshifts, are compared to those found at low-zanalyzed in Hart et al. (2009). Within a projected radius of 1 Mpc of thecluster cores, we find 17 cluster radio galaxies (11 with secure redshifts,including one luminous FR II radio source at z=0.826, and 6 more with hostgalaxy colors similar to cluster ellipticals). The radio luminosity function(RLF) of the cluster radio galaxies as a fraction of the cluster red sequence(CRS) galaxies reveals significant evolution of this population from high-z tolow-z, with higher power radio galaxies situated in lower temperature clustersat earlier epochs. Additionally, there is some evidence that cluster radiogalaxies become more centrally concentrated than CRS galaxies with cosmic time.Within this same projected radius, we identify 7 spectroscopically-confirmedcluster XPSs, all with CRS host galaxy colors. Consistent with the results fromMartini et al. (2009), we estimate a minimum X-ray active fraction of1.4+/-0.8% for CRS galaxies in high-z clusters, corresponding to an approximate10-fold increase from 0.15+/-0.15% at low-z. Although complete redshiftinformation is lacking for several XPSs in z>0.4 cluster fields, the increasednumbers and luminosities of the CRS radio galaxies and XPSs suggest asubstantial (9-10 fold) increase in the heat injected into high redshiftclusters by AGN compared to the present epoch.

The Evolution of Radio Galaxies and X-ray Point Sources in Coma Cluster Progenitors Since z~1.2