Do active galaxies have a massive halo component? |
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| Institution: | 1. UNESCO Centre for Membrane Science and Technology, School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia;2. Cooperative Research Centre for Polymers, Notting Hill, VIC 3168, Australia;1. Molecular Immunity Unit, Department of Medicine, University of Cambridge, Cambridge CB2 0QQ, UK;2. Department of Physiology, University of Munich, 80336 Munich, Germany;1. The MOE Key Laboratory for Standardization of Chinese Medicines and The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai 201203, China;2. Shanghai R&D Centre for Standardization of Chinese Medicines, 199 Guoshoujing Road, Shanghai 201203, China;3. Drug Safety Evaluation and Research Center of Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai 201203, China;1. Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Belgrade, Vojvode Stepe 450, 11000 Belgrade, Serbia;2. Department of Organic Chemistry, Faculty of Pharmacy, University of Belgrade, Vojvode Stepe 450, 11000 Belgrade, Serbia;1. Mechanical and Aerospace Engineering Department, University of California, Los Angeles, Henry Samueli School of Engineering and Applied Science, United States;3. California Nanosystems Institute (CNSI), University of California, Los Angeles, Henry Samueli School of Engineering and Applied Science, United States;4. Luskin School of Public Affairs, Department of Urban Planning, University of California, Los Angeles, Henry Samueli School of Engineering and Applied Science, United States |
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| Abstract: | We present a dynamical model for an active galaxy. Our model is a mass model with a disk, nucleus, and halo components. Numerical calculations and theoretical evidence show, that for a fixed value of mass of the galaxy the stellar velocities in the central region decrease as the mass of halo increases. Furthermore, the motion tends to be regular while, when the halo component is absent, the majority of orbits are chaotic. The dynamical evolution of the system is also studied when mass is transported from the halo to the disk and the nucleus. Our results are compared to the recently obtained observation data for active galaxies. |
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