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

• Published in: The Astrophysical Journal
• Main Authors: Bulbul, Esra, Chiu, I. -Non, Mohr, Joseph J., McDonald, Michael, Benson, Bradford, Bautz, Mark W., Bayliss, Matthew, Bleem, Lindsey, Brodwin, Mark, Bocquet, Sebastian, Capasso, Raffaella, Dietrich, Jörg P., Forman, Bill, Hlavacek-Larrondo, Julie, Holzapfel, W. L., Khullar, Gourav, Klein, Matthias, Kraft, Ralph, Miller, Eric D., Reichardt, Christian, Saro, Alex, Sharon, Keren, Stalder, Brian, Schrabback, Tim, Stanford, Adam
• Other Authors: Mcdonald, Michael, Klein, Matthia
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2019
• Subjects: large-scale structure of universe; X-rays: galaxies: cluster; Astrophysics - Cosmology and Nongalactic Astrophysics; South Pole; South pole
• Online Access: http://hdl.handle.net/11368/2962498; https://doi.org/10.3847/1538-4357/aaf230; https://iopscience.iop.org/article/10.3847/1538-4357/aaf230/meta

We present measurements of the X-ray observables of the intracluster 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 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 ≥ 3 × 1014 M ☉) 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 ≥2.5σ 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, but the redshift and mass trends are limited by the X-ray sample size and the measurement uncertainties of the X-ray observables.