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  • 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 ...
  • DE CARVALHO, LETHYCIA MARIA (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2022-08-30)
    After centuries of acceptance of geocentrism, the heliocentric model and cosmic pluralism strengthened the idea of multiple worlds. Currently, thousands of these objects have already been confirmed and a considerable ...
  • DE JESUS SANTOS, WILTON (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2024-03-28)
    Open clusters, rich in gas and dust, are excellent environment for star formation. The formation of massive stars, however, requires specific conditions, associated with the giant molecular clouds. Massive stars of spectral ...
  • 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 ...
  • LUCIO MEDEIROS, HISSA MARIA (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2019-07-25)
    In order to contribute to a better understanding of the origin and evolution from different populations of small bodies, we did studies about some physical properties both obtained and from our observations. Initially, it ...
  • MARTINEZ, CINTIA FERNANDA (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2015-07-23)
    The study of open clusters allow us to understand the behavior and structure of the Milky Way, as well as the formation and evolution of the stars. In that sense, red giant stars in open clusters are the best target of ...
  • NEVES CAMPAGNOLO, JULIO CESAR (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2018-12-21)
    Abstract: This PhD thesis is related to Luminous Blue Variable stars (LBV), which are some of the most luminous stars and are characterized by eruptive processes that cause intense photometric and spectroscopic variability. ...
  • OSTROVSKI DUTRA, FERNANDA (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2013-04-25)
    quasares são objetos primordiais de grande importância para o estudo da evolução das galáxias e do Universo. Os grandes levantamentos que estão surgindo e planejam cobrir grandes áreas do céu a limites profundos de magnitude, ...
  • PINTO RODRIGUES DE ALMEIDA, KARYNE (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2024-01-31)
    Some of the brightest stars undergo sporadic and intense mass loss events, whose origins have not yet been fully understood. These hot and evolved stars are referred to as Luminous Blue Variables (LBVs), and their instability ...
  • VIEIRA DE MELO MONTEIRO, FILIPE (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2016-07-25)
    Photometric data for 35 Near-Earth Asteroids (NEA) were obtained in the present work. The data were acquired at the 1-m telescope of the Observatório Astronômico do Sertão de Itaparica - OASI - (Itacuruba, PE) and were ...