paper

SZ/X-ray scaling relations using X-ray data and Planck Nominal maps

arXiv:1606.04983 · doi:10.1093/mnras/stw1493

Abstract

We determine the relation between the Comptonization parameter predicted using X-ray data and the X-ray luminosity , both magnitudes derived from ROSAT data, with the Comptonization parameter measured on {\it Planck} 2013 foreground cleaned Nominal maps. The 560 clusters of our sample includes clusters with masses , one order of magnitude smaller than those used by the Planck Collaboration in a similar analysis. It also contains eight times more clusters in the redshift interval . The prediction of the model convolved with the Planck antenna beam agrees with the anisotropies measured in foreground cleaned Planck Nominal maps within the X-ray emitting region, confirming the results of an earlier analysis (Atrio-Barandela et al. 2008). The universal pressure profile overestimates the signal by a 15-21\% depending on the angular aperture. We show that the discrepancy is not due to the presence of {\it cool-core} systems but it is an indication of a brake in the relation towards low mass systems. We show that relation of the Comptonization parameter averaged over the region that emits 99\% of the X-ray flux and and the X-ray luminosity is consistent with the predictions of the self-similar model. We confirm previous findings that the scaling relations studied here do not evolve with redshift within the range probed by our catalog.

13 pages, 5 figures, 3 tables. Accepted for publication in MNRAS

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