X-ray Properties of SPT Selected Galaxy Clusters at 0.2<z<1.5 Observed with XMM-Newton

Kavli Affiliate: Eric D. Miller

| First 5 Authors: Esra Bulbul, I-Non Chiu, Joseph J. Mohr, Michael McDonald, Bradford Benson

| Summary:

We present measurements of the X-ray observables of the intra-cluster medium
(ICM), including luminosity $L_X$, ICM mass $M_{ICM}$, emission-weighted mean
temperature $T_X$, and integrated pressure $Y_X$, that are derived from
XMM-Newton X-ray observations of a Sunyaev-Zel’dovich Effect (SZE) selected
sample of 59 galaxy clusters from the South Pole Telescope SPT-SZ survey that
span the redshift range of $0.20 < z < 1.5$. We constrain the best-fit power
law scaling relations between X-ray observables, redshift, and halo mass. The
halo masses are estimated based on previously published SZE observable to mass
scaling relations, calibrated using information that includes the halo mass
function. Employing SZE-based masses in this sample enables us to constrain
these scaling relations for massive galaxy clusters ($M_{500}geq 3
times10^{14}$ $M_odot$) to the highest redshifts where these clusters exist
without concern for X-ray selection biases. We find that the mass trends are
steeper than self-similarity in all cases, and with $geq 2.5{sigma}$
significance in the case of $L_X$ and $M_{ICM}$. The redshift trends are
consistent with the self-similar expectation, but the uncertainties remain
large. Core-included scaling relations tend to have steeper mass trends for
$L_X$. There is no convincing evidence for a redshift-dependent mass trend in
any observable. The constraints on the amplitudes of the fitted scaling
relations are currently limited by the systematic uncertainties on the
SZE-based halo masses, however the redshift and mass trends are limited by the
X-ray sample size and the measurement uncertainties of the X-ray observables.

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