@Article{Wuensche:2022:Co21Cm,
author = "Wuensche, Carlos Alexandre",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "A cosmologia de 21 cm e o radiotelesc{\'o}pio BINGO",
journal = "Cadernos de Astronomia",
year = "2022",
volume = "3",
number = "1",
pages = "43",
keywords = "cosmologia de 21 cm, radioastronomia, oscila{\c{c}}{\~o}es
ac{\'u}sticas de b{\'a}rions, 21 cm cosmology, radioastronomy,
baryon acoustic oscillations.",
abstract = "presentamos neste artigo um breve panorama da cosmologia de 21 cm,
baseada no estudo da transi{\c{c}}{\~a}o hiperfinado spin do
el{\'e}tron no {\'a}tomo de hidrog{\^e}nio neutro (HI). A
distribui{\c{c}}{\~a}o de HI{\'e} um dos tra{\c{c}}adores da
aglutina{\c{c}}{\~a}ode mat{\'e}ria e da forma{\c{c}}{\~a}o
de estruturas e {\'e}, possivelmente, a {\'u}nica forma de
observar o universo antes dareioniza{\c{c}}{\~a}o, ocorrida
em20\&z\&6. Apresentamos a t{\'e}cnica de radioastronomia
utilizada para medir adistribui{\c{c}}{\~a}o de HI, conhecida
como mapeamento de intensidade, e os requisitos instrumentais
necess{\'a}rios pararealiz{\'a}-lo e produzir um levantamento de
HIem r{\'a}dio, ao longo de um intervalo
deredshifts2,5\&z\&0,1.Nesse contexto, apresentamos o
radiotelesc{\'o}pio BINGO, que est{\'a} sendo
constru{\'{\i}}do no Brasil e foi projetadopara medir
oscila{\c{c}}{\~o}es ac{\'u}sticas de b{\'a}rions no universo
pr{\'o}ximo (0,127\≤z\≤0,449) usando o mapeamento
deintensidade da transi{\c{c}}{\~a}o de 21 cm. ABSTRACT: In this
article we present a brief overview of the 21 cm cosmology, based
on the study of the hyperfine spintransition of the electron in
the neutral hydrogen atom (HI). The hydrogen distribution is one
of the tracers ofthe matter clustering and formation of structures
and it is possibly the only way to observe the Universe
beforereionization, which occurred in20\&z\&6. We present the
radio astronomy technique used to measure thedistribution of HI,
known as intensity mapping, and the instrumental requirements
needed to perform it andproduce a HIsurvey in radio, over an
interval ofredshifts2.5\&z\&0.1. In this context, we present the
BINGOradio telescope, which is being built in Brazil and was
designed to measure acoustic oscillations of baryons inthe nearby
Universe (0.127\≤z\≤0.449) using intensity mapping
of the 21 cm transition.",
doi = "10.47456/Cad.Astro.v3n1.36917",
url = "http://dx.doi.org/10.47456/Cad.Astro.v3n1.36917",
issn = "2675-4754",
label = "lattes: 1448223845901360 1 Wuensche:2022:Co21Cm",
language = "pt",
targetfile = "document (5).pdf",
urlaccessdate = "14 jun. 2024"
}