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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We present results from a 100 ks XMM-Newton observation of galaxy clusterXLSSC 122, the first massive cluster discovered through its X-ray emission at$z\approx2$. The data provide the first precise constraints on the bulkthermodynamic properties of such a distant cluster, as well as an X-rayspectroscopic confirmation of its redshift. We measure an average temperatureof $kT=5.0\pm0.7$ keV; a metallicity with respect to solar of$Z/Z_{\odot}=0.33^{+0.19}_{-0.17}$, consistent with lower-redshift clusters;and a redshift of $z=1.99^{+0.07}_{-0.06}$, consistent with the earlier photo-zestimate. The measured gas density profile leads to a mass estimate at$r_{500}$ of $M_{500}=(6.3\pm1.5)\times10^{13}M_{\odot}$. From CARMA 30 GHzdata, we measure the spherically integrated Compton parameter within $r_{500}$to be $Y_{500}=(3.6\pm0.4)\times10^{-12}$. We compare the measured propertiesof XLSSC 122 to lower-redshift cluster samples, and find good agreement whenassuming the simplest (self-similar) form for the evolution of cluster scalingrelations. While a single cluster provides limited information, this resultsuggests that the evolution of the intracluster medium in the most massive,well developed clusters is remarkably simple, even out to the highest redshiftswhere they have been found. At the same time, our data reaffirm the previouslyreported spatial offset between the centers of the X-ray and SZ signals forXLSSC 122, suggesting a disturbed configuration. Higher spatial resolution datacould thus provide greater insights into the internal dynamics of this system.

The XXL Survey: XVII. X-ray and Sunyaev-Zel'dovich Properties of the Redshift 2.0 Galaxy Cluster XLSSC 122