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In the last eight years, the Chandra and XMM–Newton satellites changed significantly our view of X–ray clusters of galaxies. In particular, several complex phenomena have been directly observed: interactions between cluster galaxies and the Intra Cluster Medium (ICM), cold fronts in the ICM, hot bubbles due to relativistic jets from radio loud AGN, the lack(More)
We use numerical simulations to examine the substructure within galactic and cluster mass halos that form within a hierarchical universe. Clusters are easily reproduced with a steep mass spectrum of thousands of substructure clumps that closely matches observations. However, the survival of dark matter substructure also occurs on galactic scales, leading to(More)
  • Optical Spectroscopy, G P Szokoly, +16 authors A Zirm
  • 2004
We present the results of our spectroscopic follow-up program of the X-ray sources detected in the 942 ks exposure of the Chandra Deep Field South (CDFS). 288 possible counterparts were observed at the VLT with the FORS1/FORS2 spectrographs for 251 of the 349 Chandra sources (including three additional faint X-ray sources). Spectra and R-band images are(More)
The ROSAT Deep Cluster Survey (RDCS) has provided a new large deep sample of X–ray selected galaxy clusters. Observables such as the flux number counts n(S), the redshift distribution n(z) and the X-ray luminosity function (XLF) over a large redshift baseline (z ∼ < 0.8) are used here in order to constrain cosmological models. Our analysis is based on the(More)
We present our first results from 130 ks of X–ray observations obtained with the Advanced CCD Imaging Spectrometer on the Chandra X–ray Observatory. The field of the two combined exposures is 0.096 square degrees and the detection limit is to a S/N ratio of 2 (corresponding to ∼ 7 net counts). We reach a flux of 2 × 10 −16 erg s −1 cm −2 in the 0.5–2 keV(More)
In order to constrain the physical processes that regulate and downsize the Active Galactic Nucleus (AGN) population, the predictions of the MOdel for the Rise of GAlaxies aNd Active nuclei (morgana) are compared to luminosity functions (LFs) of AGNs in the optical, soft X-ray and hard X-ray bands, to the local BH–bulge mass relation, and to the observed(More)
We analyse parallel N-body simulations of three Cold Dark Matter (CDM) universes to study the abundance and clustering of galaxy clusters. The simulation boxes are 500h −1 Mpc on a side and cover a volume comparable to that of the forthcoming Sloan Digital Sky Survey. The use of a treecode algorithm and 47 million particles allows us at the same time to(More)
A simple two color selection based on B-, z-, and K-band photometry is proposed for culling galaxies at 1.4 < ∼ z < ∼ 2.5 in K-selected samples and classifying them as star-forming or passive systems. The method is calibrated on the highly complete spectroscopic redshift database of the K20 survey, verified with simulations and tested on other datasets.(More)
BACKGROUND Myofascial Release (MFR) and Fascial Unwinding (FU) are widely used manual fascial techniques (MFTs), generally incorporated in treatment protocols to release fascial restrictions and restore tissue mobility. However, the effects of MFT on pain perception, and the mobility of fascial layers, have not previously been investigated using dynamic(More)
OBJECTIVES a) To calculate and compare a Kidney Mobility Score (KMS) in asymptomatic and Low Back Pain (LBP) individuals through real-time Ultrasound (US) investigation. b) To assess the effect of Osteopathic Fascial Manipulation (OFM), consisting of Still Technique (ST) and Fascial Unwinding (FU), on renal mobility in people with non-specific LBP. c) To(More)