2006/03/31 by Y. -Y. Zhang, Y.-Y. Zhang, H. Böhringer +8 · 4 citations
Physics and Astronomy · #Astrophysical Phenomena and Observations #Astrophysics #Astrophysics and Cosmic Phenomena #Baryon #CMB cold spot #Cluster (spacecraft) #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy cluster #Geometry #Normalization (sociology) #Optics #Physics #Redshift #Scaling #astro-ph
paper · pdf · doi:10.1051/0004-6361:20053650
published as 2006A&A...456...55Z · Astronomy and Astrophysics, Volume 456, Issue 1, September II 2006, pp.55-74
openalex publication_date 2006/08/04 · arxiv created 2008/11/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We selected an unbiased, flux-limited and almost volume-complete sample of 13 distant, X-ray luminous (DXL, ) clusters and one supplementary cluster at from the REFLEX Survey (the REFLEX-DXL sample). We performed a detailed study to explore their X-ray properties using XMM-Newton observations. Based on the precise radial distributions of the gas density and temperature, we obtained robust cluster masses and gas mass fractions. The average gas mass fraction of the REFLEX-DXL sample at r500, , agrees with the previous cluster studies and the WMAP baryon fraction measurement. The scaled profiles of the surface brightness, temperature, entropy, gas mass and total mass are characterized by a self-similar behaviour at radii above 0.2-0.3 r500. The REFLEX-DXL sample confirms the previous studies of the normalization of the scaling relations (, , and ) when the redshift evolution of the scaling relations is accounted for. We investigated the scatter of the scaling relations of the REFLEX-DXL sample. This gives the correlative scatter of (0.20, 0.10) for variable of (M, T) of the relation, for example.