Galactic Dynamics
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Formação estelar no complexo de nuvens moleculares em Monoceros / Star Formation in the Molecular Cloud Complex in Monoceros
We compare two molecular clouds of the Monoceros Complex in order to study their physical conditions related to the early stages of star formation. The selected clouds, Rosette (RMC) and Monoceros R2 (Mon R2), are interesting regions due to their characteristics that may be confronted with the hypothesis of star formation triggered by high velocity clouds (H
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/05/2012
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2. Dynamics of Barred Galaxies in Triaxial Dark Matter Haloes / Dinâmica de galáxias barradas em halos triaxiais de matéria escura
Cosmological N-body simulations indicate that the dark matter haloes of galaxies should be generally triaxial. Yet, the presence of a baryonic disc is believed to modify the shape of the haloes. The goal of this thesis is to study how bar formation is affected by halo triaxiality and how, in turn, the presence of the bar influences the shape of the halo. We
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/10/2010
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3. Fronteiras fractais em sistemas hamiltonianos e em relatividade geral
We study the dynamics of test particles in Hamiltonian systems with escapes, including Newtonian systems (the Hénon-Heiles system for energies above the escape energy) and general-relativistic systems corresponding to static axisymmetric mass distributions, which could be used to model galactic cores; in particular, we study the motion of test particles in
Publicado em: 2000
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4. Graviton scattering and matter distribution.
In this model gravitation results from the emission and absorption of quanta (gravitons) that are scattered a few times in crossing a typical galaxy. Many features of the universe can be explained in terms of this model, although theoretical justification for the scattering of gravitons is lacking. Gravitons follow a random walk and diffuse through the outer
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5. Probing active galactic nuclei with H2O megamasers.
We describe the characteristics of the rapidly rotating molecular disk in the nucleus of the mildly active galaxy NGC4258. The morphology and kinematics of the disk are delineated by the point-like watervapor emission sources at 1.35-cm wavelength. High angular resolution [200 microas where as is arcsec, corresponding to 0.006 parsec (pc) at 6.4 million pc]