Vicent Quilis

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It has been recently argued through numerical work that rotating stars with a high degree of differential rotation are dynamically unstable against bar-mode deformation, even for values of the ratio of rotational kinetic energy to gravitational potential energy as low as O(0.01). This may have implications for gravitational wave astronomy in high-frequency(More)
We use a three dimensional hydrodynamical code to simulate the effect of energy injection on cooling flows in the intracluster medium. Specifically, we compare a simulation of a 10 M cluster with radiative cooling only, with a second simulation in which thermal energy is injected 31 kpc off-centre, over 64 kpc at a rate of 4.9×1044ergs s−1 for 50 Myr. The(More)
We present a complete analysis, which includes morphology, kinematics, stellar populations and N-body simulations of CGCG 480-022, the most distant (cz = 14317 km s −1) isolated galaxy studied so far in such detail. The results all support the hypothesis that this galaxy has suffered a major merger event with a companion of ∼ 0.1 times its mass. Morphology(More)
Introduction Meningeal melanocytomas are rare tumors of the CNS that develop from melanocytes that are present in leptomeninges, with differing pigmented appearance. They generally occur in the posterior fossa and the spinal cord. This lesion may manifest at any age, but most patients are in the fifth decade of life. Occasionally, these tumors appear in a(More)
We investigate the evolution of angular momentum in Smoothed Particle Hydrodynamic (SPH) simulations of galaxy formation, paying particular attention to artificial numerical effects. We find that a cold gas disc forming in an ambient hot gas halo receives a strong hydrodynamic torque from the hot gas. By splitting the hydrodynamic force into artificial(More)
We present a complete analysis, which includes morphology, kinematics, stellar populations, and N-body simulations, of CGCG 480 022, the most distant ( km s ) isolated galaxy studied so far in such cz p 14,317 detail. The results all support the hypothesis that this galaxy has suffered a major merger event with a companion of ∼0.1 times its mass. Morphology(More)
The applicability of the potential approximation in the case of open universes is tested. Great Attractor-like structures are considered in the test. Previous estimates of the Cosmic Microwave background anisotropies produced by these structures are analyzed and interpreted. The anisotropies corresponding to inhomogeneous ellipsoidal models are also(More)
Received ; accepted – 2 – ABSTRACT Numerical simulations of galaxy clusters including two species – baryonic gas and dark matter particles – are presented. Cold Dark Matter spectrum, Gaussian statistics and flat universe are assumed. The dark matter component is evolved numerically by means of a standard particle mesh method. The evolution of the baryonic(More)