We investigate the cross-talk between the two key components of tidal-torque theory, the inertia (I) and shear (T ) tensors, using a cosmological N -body simulation with thousands of well-resolved haloes. We find that the principal axes of I and T are strongly aligned, even though I characterizes the proto-halo locally while T is determined by the large-scale structure. Thus, the resultant gala...

Using a suite of three large cosmological hydrodynamical simulations, HORIZON–AGN, HORIZON–NOAGN (no AGN feedback) and HORIZON–DM (no baryons), we investigate how a typical sub-grid model for AGN feedback affects the evolution of the inner density profiles of massive dark matter haloes and galaxies. Based on direct object-to-object comparisons, we find that the integrated inner mass and density...

We present the measurements and modelling of the small-to-intermediate scale (∼0.1– 25 h−1 Mpc) projected and three-dimensional redshift-space two-point correlation functions (2PCFs) of local galaxies in the Sloan Digital Sky Survey Data Release 7. We find a clear dependence of galaxy clustering on luminosity in both projected and redshift spaces, generally being stronger for more luminous samp...

The Large Scale Structure (LSS) found in galaxy redshift surveys and in computer simulations of cosmic structure formation shows a very complex network of galaxy clusters, filaments, and sheets around large voids. Here, we introduce a new algorithm, based on a Minimal Spanning Tree, to find basic structural elements of this network and their properties. We demonstrate how the algorithm works us...

Analysing the weak lensing distortions of the images of faint background galaxies provides a means to constrain the average mass distribution of cluster galaxies and potentially to test the extent of their dark matter haloes as a function of the density of their environment. The observable image distortions are a consequence of the interplay between the eeects of a global cluster mass distribut...

Friedreich's ataxia (FRDA) is caused by low expression of frataxin, a small mitochondrial protein. Studies with both yeast and mammals have suggested that decreased frataxin levels lead to elevated intramitochondrial concentrations of labile (chelatable) iron, and consequently to oxidative mitochondrial damage. Here, we used the mitochondrion-selective fluorescent iron indicator/chelator rhodam...

We study the degree to which non–radiative gas dynamics affects the merger histories of haloes along with subsequent predictions from a semi–analytic model (SAM) of galaxy formation. To this aim, we use a sample of dark matter only and non–radiative SPH simulations of four massive clusters. The presence of gas–dynamical processes (e.g. ram-pressure from the hot intra–cluster atmosphere) makes h...

This paper uses numerical simulations to test the formation time distribution of dark matter haloes predicted by the analytic excursion set approaches. The formation time distribution is closely linked to the conditional mass function and this test is therefore an indirect probe of this distribution. The excursion set models tested are the extended Press-Schechter (EPS) model, the ellipsoidal c...

The deposition of the Lower Cambrian argillaceous rocks on Kongquehe slope provides a good opportunity to reconstruct paleoenvironmental conditions Tarim Basin. To explore paleoredox conditions, paleoclimate, and provenance this deposit, 21 samples were collected from Well A, concentrations major trace elements analyzed. V/(V + Ni), V/Cr, Ni/Co, U/Th, Uau, V/Sc ratios indicated that sediments i...