@TechReport{VieiraWuenVite:2023:EsOsAc,
               author = "Vieira, Juliana Akemi Takahashi and Wuensche, Carlos Alexandre and 
                         Vitenti, Mariana Penna Lima",
                title = "Estudo das oscila{\c{c}}{\~o}es ac{\'u}sticas de b{\'a}rion se 
                         simula{\c{c}}{\~o}es de observa{\c{c}}{\~o}es com o 
                         radiotelesc{\'o}pio BINGO",
          institution = "Instituto Nacional de Pesquisas Espaciais",
                 year = "2023",
                 type = "RPQ",
              address = "S{\~a}o Jos{\'e} dos Campos",
                 note = "{Bolsa PIBIC/PIBITI/INPE/CNPq.}",
             keywords = "cosmologia de 21 cm, radioastronomia, oscila{\c{c}}{\~o}es 
                         ac{\'u}sticas de b{\'a}rions, 21 cm cosmology, radio astronomy, 
                         baryon acoustic oscillations.",
             abstract = "Neste trabalho apresentamos a an{\'a}lise dos processos 
                         f{\'{\i}}sicos relevantes para a cosmologia de 21 cm, a 
                         fenomenologia das oscila{\c{c}}{\~o}es ac{\'u}sticas de 
                         b{\'a}rions (BAOs) e seu impacto sobre a potencial 
                         determina{\c{c}}{\~a}o da natureza e caracter{\'{\i}}sticas da 
                         energia escura. As BAOs s{\~a}o uma consequ{\^e}ncia do 
                         acoplamento entre a mat{\'e}ria e a radia{\c{c}}{\~a}o 
                         ap{\'o}s o per{\'{\i}}odo infl acion{\'a}rio, cuja 
                         intera{\c{c}}{\~a}o se dava principalmente atrav{\'e}s de 
                         processos de espalhamento Compton. Este fen{\^o}meno {\'e} 
                         caracterizado por uma s{\'e}rie de compress{\~o}es e 
                         rarefa{\c{c}}{\~o}es de estruturas de dimens{\~o}es variadas 
                         provenientes da competi{\c{c}}{\~a}o entre a press{\~a}o da 
                         radia{\c{c}}{\~a}o e a intera{\c{c}}{\~a}o gravitacional, 
                         originando ondas de densidade que se propagavam pelo plasma 
                         primordial. Considerando a escala ac{\'u}stica impressa na 
                         distribui{\c{c}}{\~a}o de mat{\'e}ria durante o desacoplamento 
                         mat{\'e}ria-radia{\c{c}}{\~a}o, estamos realizando estudos 
                         cosmol{\'o}gicos com dados da distribui{\c{c}}{\~a}o de 
                         hidrog{\^e}nio neutro, que constitui cerca de 75% da mat{\'e}ria 
                         bari{\^o}nica do Universo e {\'e} um dos tra{\c{c}}adores da 
                         aglutina{\c{c}}{\~a}o da mat{\'e}ria e da forma{\c{c}}{\~a}o 
                         de estruturas em grande escala. Para isso utilizaremos a 
                         t{\'e}cnica do mapeamento de intensidade, utilizada pelo 
                         radiotelesc{\'o}pio BINGO e outros instrumentos que estudam a 
                         emiss{\~a}o do hidrog{\^e}nio em 21 cm ao longo do volume 
                         c{\'o}smico. ABSTRACT: In this work we present the analysis of 
                         physical processes relevant to cosmology of 21 cm, the 
                         phenomenology of baryon acoustic oscillations (BAOs) and their 
                         impact on the potential determination of the nature and 
                         characteristics of dark energy. BAOs are a consequence of the 
                         coupling between matter and radiation after the infl ationary 
                         period, whose interaction took place mainly through Compton 
                         scattering processes. This one phenomenon is characterized by a 
                         series of compressions and rarefactions of varied dimensions 
                         arising from the competition between radiation pressure and the 
                         interaction of gravitational force, originating waves of density 
                         that propagated through the primordial plasma. Considering the 
                         acoustic scale imprinted on the distribution of matter during the 
                         matter-radiation decoupling, we are carrying out cosmological 
                         studies with data from distribution of neutral hydrogen, which 
                         constitutes about 75% of the baryonic matter of the Universe and 
                         is one of the tracers of the agglutination of matter and the 
                         formation of structures in large scale. For this, we will use the 
                         technique of intensity mapping, used by the BINGO radio telescope 
                         and other instruments that study the emission of hydrogen in 21 cm 
                         throughout the cosmic volume.",
          affiliation = "{Universidade de Bras{\'{\i}}lia (UNB)} and {Instituto Nacional 
                         de Pesquisas Espaciais (INPE)} and {Universidade de 
                         Bras{\'{\i}}lia (UNB)}",
             language = "pt",
                pages = "43",
                  ibi = "8JMKD3MGP3W34T/49SS3MH",
                  url = "http://urlib.net/ibi/8JMKD3MGP3W34T/49SS3MH",
           targetfile = "Relatorio_Final_Juliana_Akemi_Takahashi_Vieira.pdf",
        urlaccessdate = "01 maio 2024"
}