AGN effect on cooling flow dynamics
نویسندگان
چکیده
منابع مشابه
AGN self-regulation in cooling flow clusters
We use three-dimensional high-resolution adaptive-mesh-refinement simulations to investigate if mechanical feedback from active galactic nucleus jets can halt a massive cooling flow in a galaxy cluster and give rise to a self-regulated accretion cycle. We start with a 3 × 109M⊙ black hole at the centre of a spherical halo with the mass of the Virgo cluster. Initially, all the baryons are in a h...
متن کاملThe Detectability of AGN Cavities in Cooling-Flow Clusters
Chandra X-ray Observatory has revealed X-ray cavities in many nearby cooling flow clusters. The cavities trace feedback from the central active galactic nulceus (AGN) on the intracluster medium (ICM), an important ingredient in stabilizing cooling flows and in the process of galaxy formation and evolution. But, the prevalence and duty cycle of such AGN outbursts is not well understood. To this ...
متن کاملAGN and Cooling Flows
For two decades the steady-state cooling-flow model has dominated the literature of cluster and elliptical-galaxy X-ray sources. For ten years this model has been in severe difficulty from a theoretical point of view, and it is now coming under increasing pressure observationally. A small number of enthusiasts have argued for a radically different interpretation of the data, but had little impa...
متن کاملAGN Heating of Cooling Flow Clusters: Problems with 3D Hydrodynamic Models
Relaxed galaxy clusters have central cooling times less than the age of the cluster. However, there are observational limits to the amounts of cool gas present, and XMM-Newton spectroscopy shows nothing below ∼ 1 3 Tvirial (1−2keV ). This discrepancy is the heart of the classical cooling flow problem. Viewed from another angle, the galaxy luminosity function is truncated at the high end [1]. So...
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Background: Aerobic exercise with Blood Flow Restriction (BFR) plays an important role in skeletal muscle adaptation; however, the effects of this type of exercise on mitochondrial dynamics proteins are unclear. Objective: The purpose of this study was to investigate the effect of aerobic exercise with and without BFR on mitochondrial dynamics proteins of human skeletal muscles. Methods: Pa...
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ژورنال
عنوان ژورنال: Astrophysics and Space Science
سال: 2007
ISSN: 0004-640X,1572-946X
DOI: 10.1007/s10509-007-9542-4