Dissertações de Mestrado PPGA: Recent submissions

  • LARANJEIRA, SERGIO EDUARDO (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2017-07-07)
    Recent observational data suggest that, from the total content of the universe, ∼ 26% is in the form of the so-called Dark Matter (DM). At present, there is no settled understanding of its nature. On the other hand, galactic ...
  • BARROS DE CICCO, MARCELO ANTONIO (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2017-09-27)
    EXOSS (Exploring Southerns Skies for New Radiants) it is a citizen science project that started its activities on May 2015 and later became a master graduate project developing its operational and scientific structure, ...
  • DA SILVA ARCOVERDE, PLICIDA MARIA (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2018-02-23)
    In this work we present the results obtained from the study of the phase curve of 29 NEO through observations with the telescope of the Observatório Astronômico do Sertão de Itaparica (OASI), of the IMPACTON project. ...
  • DOS SANTOS ANDRADE, UENDERT (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2018-02-27)
    The standard cosmology strongly relies upon the Cosmological Principle, which consists on the hypotheses of large scale isotropy and homogeneity of the Universe. Testing these assumptions is, therefore, crucial to determining ...
  • DA SILVA AVILA, FELIPE (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2018-02-27)
    The standard model of cosmology is based on the Cosmological Principle (CP), which states that, on large scales, the Universe is homogeneous and isotropic. It predicts that the transition from an inhomogenous to a homogeous ...
  • BATALHA DE MELO, REBECA MARIA (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2018-03-15)
    The phenomenon of Supernova is not completely understood. The explosion mechanisms of Supernovae (SNe) and the nature of their binary system still remain open. In the current literature, there are a variety of theoretical ...
  • DE JESUS SANTOS, WILTON (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2018-08-27)
    Abstract DISTRIBUTIONS OF PROJECTED ROTATIONAL VELOCITIES IN 4 OPEN CLUSTERS IN THE CARINA REGION Wilton de Jesús Santos August/2018 Advisor: PhD. Simone Daflon Program: Astronomy Trumpler 14, 15 and 16 (Tr14, Tr15 and ...
  • QUISPE HUAYNASI, FREDI (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2018-08-28)
    The study of transneptunian objects (TNOs) and Centaurs, because to their low brightness, is not simple. However, great contributions to the study and characterization of these objects have been obtained from the application ...
  • LOAIZA TACURI, VERONICA (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2018-09-06)
    Chemical Abundances in red giants of the open clusters NGC 2420, NGC 6819 and NGC 6705 from APOGEE spectra Studying chemical abundances of stars belonging to open clusters helps in understanding the formation and evolution ...
  • MELO DE MENEZES, LUIZ FELIPE (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2018-12-17)
    ABSTRACT: Protoclusters of galaxies, the progenitors of high-redshift galaxy clusters, are ideal laboratories to study dark matter assembly and galaxy evolution. However, despite of their importance, only a small and ...
  • POSSES NASCIMENTO, ANA CAROLINA (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2019-03-26)
    Environmental effects in cluster RX J0152.7-1357, at z = 0.84 External mechanisms can transform galaxies over time. This occurs predominantly in denser environments such as groups and clusters of galaxies, where the ...
  • LOPES DE OLIVEIRA, NICOLAS OTAVIO (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2020-03-13)
    The intracluster light (ICL) is defined as a low surface brightness component of galaxy clusters made up of stars that do not belong to any specific galaxy, but are linked to the system’s gravitational potential. Although ...
  • SOARES DA SILVA DE PINHO NOGUEIRA, PEDRO HENRIQUE (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2020-04-30)
    Abstract The Kepler mission was designed to search for Earth-sized planets orbiting main-sequence stars. To achieve its goal, it used the transit method, analyzing light curves and searching for periodic decreases in flux ...
  • MASSON VICENTE, ALEXANDRE (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2020-07-07)
    This work aims to obtain a non-parametric reconstruction of the temperature evolution law of the cosmic microwave background by the application of Gaussian Processes and to set constraints on cosmologies that violate the ...
  • BESSA RODRIGUES DUTRA, PEDRO HENRIQUE (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2020-07-21)
    The Integrated Sachs-Wolfe effect is a Cold Microwave Background observable particularly sensitive to the change in cosmological eras dominated by different mat- ter components. Its temperature power spectrum is a strong ...
  • 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 ...