Abstract
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 x 10(14) M-circle dot) 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 >= 2.5 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, but the redshift and mass trends are limited by the X-ray sample size and the measurement uncertainties of the X-ray observables.
| Dokumententyp: | Zeitschriftenartikel |
|---|---|
| Fakultät: | Physik |
| Themengebiete: | 500 Naturwissenschaften und Mathematik > 530 Physik |
| ISSN: | 0004-637X |
| Sprache: | Englisch |
| Dokumenten ID: | 82998 |
| Datum der Veröffentlichung auf Open Access LMU: | 15. Dez. 2021, 15:04 |
| Letzte Änderungen: | 15. Dez. 2021, 15:04 |
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