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

Diffuse synchrotron radio emission has been observed in a number of cool-coreclusters on scales comparable to that of the cooling region. These radiosources are called `mini-halos'. In order to understand their origin, which isstill unclear, joint radio and X-ray statistical studies of large clustersamples are necessary to investigate the radio mini-halo properties and theirconnection with the cluster thermodynamics. We here extend our previousexplorative study and investigate the perspectives offered by surveys in theradio continuum with LOFAR and SKA, in particular examining the effect of theintra-cluster magnetic field in the mini-halo region for the first time. Byconsidering the minimum flux detectable in radio surveys and exploiting the$P_{radio}-L_X$ correlation observed for known mini-halos, we estimate thedetection limits achievable by future radio observational follow-up of X-raycluster samples, such as HIFLUGCS and eROSITA. This allows us to estimate themaximum number of radio mini-halos that can potentially be discovered in futuresurveys as a function of redshift and magnetic field strength. We show thatfuture radio surveys with LOFAR and SKA1 (at 140 MHz and 1.4 GHz) have thepotential to discover ~1,000-10,000 radio mini-halo candidates up to redshiftz=1. We further note that future SKA1 radio surveys at redshift z>0.6 willallow us to distinguish between different magnetic fields in the mini-haloregion, because higher magnetic fields are expected to produce more powerfulmini-halos, thus implying a larger number of mini-halo detected at highredshift. For example, the non-detection with SKA1 of mini-halos at z>0.6 willsuggest a low magnetic field (B < few $\mu$G). The synergy of these radiosurveys with future X-ray observations and theoretical studies is essential inestablishing the radio mini-halo physical nature. [abridged]

Radio-continuum surveys with SKA and LOFAR: a first look at the perspectives for radio mini-halos