Dissertações de Mestrado PPGA: Recent submissions

  • LEMOS PORCIUNCULA ALVES, THAIS (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2020-08-13)
    he baryonic acoustic oscillations (BAO) are a consequence of the competition between the photons radiation pressure and the gravitational force of the dark matter over the photon-baryon fluid. This phenomenon results in a ...
  • MOURA LOPES, ERIC (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2021-03-30)
    The metal-poor stars composition is an important diagnosis in the matter of galactic chemical evolution. The peculiar abundance of carbon, nitrogen, and oxygen in cold stars reveal details about the first generations of ...
  • BEHAR JORGE, PRISCILLA (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2021-04-01)
    active galactic nuclei is an extensively topic of investigation in the literature. It is known the importance that this object has in its medium where it is formed and ejected, just like its consequences. In the current ...
  • MAGALHAES DE ARAUJO, RODRIGO (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2021-04-06)
    Galaxies hosting active galactic nuclei (AGNs) play an important role in the evolution of galaxies. These AGNs are powered by the accretion of matter onto a supermassive black hole, which can result in highly energetic and ...
  • BORGES FERREIRA LIMA, GUSTAVO (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2021-08-10)
    We present in this work a practical general relativity approach in order to create a set of luminosity distance $d_L$ dataset, coming from gravitational wave simulations. Then we use these simulated data, together with ...
  • FERNANDES DE MELO, RAPHAELA (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2021-11-30)
    Abstract Carbon stars constitute a vast and interesting class of chemically peculiar stars which has carbon overabundance relative to oxygen. This class of stars was first identified by Secchi (1868) and is characterized ...
  • BASSALLO DA SILVA, TAYSA (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2017-09-29)
    This work aims at contributing to a more refined ground-based astrometry from the PRAIA code (Platform for the Reduction of Astronomical Images Automatically), more specifically, that of small solar system bodies. Such ...
  • BASANTE ERAZO, CARLOS ARTURO (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2016-03-28)
    Light curves from the occultation of a star by a distant body in the solar system allow us to meausre the dimensions of this latter with kilometric accuracies. This is rivaled only by measurements made by space probes. It ...
  • CACERES REATEGUI, JESSICA GIOVANNA (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2015-09-29)
    In this work we performed a study about the dynamical stability of co-orbital hypothetical planets (Trojans), around the Lagrangian points $L_{4}$ of known planets which form the compact extrasolar planetary systems Kepler-9 ...
  • BANDA HUARCA, MARTIN VALENTIN (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2015-09-25)
    One way to know the physical properties of Trans-Neptunian objects (TNOs) is the analysis of stellar occultations by these objects. The prediction of a stellar occultation basically depends on comparisons of TNOs' ephemeris ...
  • SAAD OLIVERA, XIMENA BEATRIZ (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2015-07-30)
    Abstract In this work we develop a semi-analytical model to analyze the dynamical evolution of a massive body in coorbital motion with the Moon. We assume that this object was formed together with the Moon and analyze their ...
  • PINHO MAGALHAES, FABIOLA (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2012-03-20)
    Most of our current knowledge of the Solar System relies on ground-based observations involving techniques like photometry and astrometry, but also Lunar Laser Ranging (LLR) and Very Large Baseline Interferometry (VLBI). ...