Teses de Doutorado PPGA: Envíos recientes

  • SANTOS DA COSTA, SIMONY (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2019-03-29)
    Abstract: Understanding the origin of the current cosmic acceleration is one of the biggest challenges in cosmology nowadays. In the context of the standard cosmological model, this acceleration is assigned to a dark energy ...
  • MARINELLO ASSIS DE OLIVEIRA, MURILO (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2019-04-12)
    Active galactic nuclei (AGN) are the most luminous astronomical objects in the sky. Different from normal galaxies, AGN are characterized by a strong luminous nucleus which can not be associated with its stars. In this ...
  • LOAIZA AGUDELO, MARYORY (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2019-06-21)
    Physical properties of starburts galaxies at low redshift: ``Lyman Break Analogs'' Lyman Break Analogs (LBAs) are starburst systems at low redshift undergoing intense and continuous processes of star formation, usually as ...
  • SAAD OLIVERA, XIMENA BEATRIZ (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2019-06-27)
    bstract In this thesis, we present results about the complete characterization of dynamical parameters in three planetary systems, Kepler-46, Kepler-419 and Kepler-59, through the analysis of the transit timing variations ...
  • MARTINEZ, CINTIA FERNANDA (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2019-06-28)
    The great statistic provided by the \textit {Kepler} mission, with the confirmation of over 4000 planets, shows the need to characterize the planets. A fundamental parameter to infer the nature of the planets is the planetary ...
  • ANTUNES MARQUES, GABRIELA (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2019-07-17)
    The photons propagating in the Universe have their trajectories disturbed due to the presence of massive structures along the line-of-sight, producing the so-called gravitational lensing effect. Because it is sensitive to ...
  • AYALA LOERA, MA DEL CARMEN (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2019-07-25)
    This work reports the results of photometric studies of transNeptunian objetcs (TNOs). Absolute magnitudes and phase coefficient from TNOs were computed (H V and β V for 124 TNOs and H R and β R for 123 TNOs). We computed ...
  • MORGADO, BRUNO EDUARDO (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2019-09-19)
    Progress in astrometry and in dynamical modeling of planetary systems have made possible the accurate estimation of tidal effects in natural moons and their planets. These studies have provided essential constraints on ...
  • FRAGA GUERCO, RAFAEL (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2019-09-26)
    The astrophysical origin of fluorine is not yet well known, but it is suggested that this element might be produced in four sites: stars on the asymptotic giant branch, via neutron and proton captures during He-burning ...
  • 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 ...
  • BAELLA PAJUELO, NOBAR OCTAVIO (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2012-03-30)
    Entre as 180 estrelas simbióticas conhecidas existe um grupo especial classificado como simbióticas amarelas Tipo-S (SATS). Esses objetos apresentam uma alta velocidade radial e baixa metalicidade que correspondem a ...
  • DE CARVALHO FILHO, EDILSON (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2019-12-11)
    Abstract The large scale structure of the Universe has been studied at several redshifts using different cosmic tracers. Among the methods employed, the search for the signature of the baryon acoustic oscillations (BAO) ...
  • DE FIGUEIREDO GSCHWEND, JULIA (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2019-12-18)
    The Dark Energy Survey (DES) is an ongoing 5-year program that covers 5000 deg2 of the sky area in five optical-near infrared photometric bands (grizY), designed to measure the dark energy and dark matter densities and the ...
  • CACERES REATEGUI, JESSICA GIOVANNA (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2020-01-29)
    Large The Influence of Planet Nine on the TNOs Orbits Abstract The hypothesis about the existence of an additional planet residing in the external solar system was recently proposed to explain the orbital confinements ...
  • BANDA HUARCA, MARTIN VALENTIN (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2020-03-23)
    The Dark Energy Survey (DES) is an international collaborative effort to reveal the nature of the mysterious dark energy which is responsible for the accelerated expansion of the universe. For this, the survey mapped about ...
  • COSTA DE SOUZA, ALAN (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2020-03-30)
    GPU PARALLELIZATION OF N-BODY ALGORITHMS AND APPLICATIONS TO EXTRASOLAR PLANETARY SYSTEMS Alan Costa de Souza ABSTRACT In this thesis, we analyzed the feasibility and implemented the parallelization of algorithms to solve ...
  • DE SOUZA FELICIANO, ANA CAROLINA (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2020-04-14)
    In order to contribute to a better understanding of small bodies, we conducted an observational study of different groups of these objects. We developed an algorithm that uses the wavelet technique to improve the spectra ...
  • VIEIRA DE MELO MONTEIRO, FILIPE (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2020-06-22)
    The population of near-Earth objects (NEOs) is one of the most interesting to be studied because, in addition to its members offering risk to Earth, they are also the smallest bodies in the Solar System whose physical ...
  • DE SOUZA, SANDRO RICARDO (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2020-07-02)
    Title: Instability effects of giant planets on the dynamic evolution of terrestrial planets Abstract: In this thesis, we present studies on the effects of planetary migration in jumping-Jupiter models. Based on a variant ...
  • SAMPAIO DOS SANTOS, HILLYSSON BRUNO (Observatorio NacionalDivisão de Programas de Pós-Graduação - DIPPGBrasilONPrograma de Pós-Graduação em Astronomia, 2020-08-28)
    ABSTRACT DIFFUSE LIGHT IN GALAXY CLUSTERS ON DARK ENERGY SURVEY AND ITS CONNECTION WITH THEIR MASS We explore the relation between diffuse intracluster light (central galaxy included) and galaxy cluster mass using a sample ...