الفهرس 
X-ray studies of galaxy clusters in the xmm-newton cluster archival super survey (X-CLASS)
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Abstract
This dissertation presents the results of a spectroscopic analysis of the
X-CLASS-redMaPPer (XC1-RM) galaxy cluster sample. The XMM
Cluster Archive Super Survey (X-CLASS) is a new catalogue of 1646
well-selected X-ray-detected clusters over a wide sky area, while redMaPPer is an optical cluster catalogue derived from the Sloan Digital Sky
Survey (SDSS). The present sample comprises 92 X-ray extended sources
identified in optical images within 10
separation. The area covered by
the cluster survey is ∼ 27 deg2
. The clusters span a wide redshift
range (0.05 < z < 0.6). The main goal of this study is to derive Xray observable (e.g.:Temperatures, Luminosities, fluxes, Gas mass) for
a sample of galaxy clusters in the X-CLASS and to investigate their
scaling relations.
We developed an automated technique to derive the X-ray properties
of the clusters in three distinct apertures: R500 (at fixed mass overdensity), Rfit (at fixed signal-to-noise ratio), R300kpc (fixed physical
radius). We determined spectroscopic redshifts for 90 clusters based
on SDSS-DR14. The results are found to agree with the most recent
studies. I investigate the luminosity-temperature (L-T) relation of the
XC1-RM sample and find a slope equal to 3.03 ± 0.26. It is steeper
than predicted by self-similar assumptions, agreeing with independent
studies. In order to investigate the impact of selection biases, we run a
set of simulations reproducing the characteristics of the measurement
process. The result of the simulation process suggests that the measured L-T relation is biased to a steeper slope and higher normalization.
We developed an automated pipeline to derive the gas masses (Mgas)
within R500 in the energy band [0.5- 2.0] keV for fifty-five clusters. The
total masses M500 for fifty-five clusters were driven from two independent mass scaling relation (Mgas-M500-z, M500-Yx). The M500 results
obtained from the two relations are consistent. We studied the scaling relations connecting gas mass, temperature, and luminosity. The
slopes of the Mgas-T (2.15 ± 0.20) and L-Yx (0.93 ± 0.04) relations are
steeper than predicted by self-similar assumption. The independent
measurements of the individual cluster masses, and further investigation on the evolution of the scaling relations will be done in the future
work