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Previous issue date: 2015-09-14 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Descoberto em 1963, 3C 273 foi o segundo quasar identificado e catalogado no Terceiro Cat?logo de Cambridge para r?dio fontes, e o primeiro para o qual as linhas de emiss?o foram identificadas com uma sequ?ncia de hidrog?nio desviada para o vermelho. Ele ? o quasar mais brilhante da esfera celeste, o mais estudado, analisado, e com uma resultante abund?ncia de dados dispon?veis em uma vasta literatura. A an?lise precisa dos desvios das linhas espectrais de quasares, fornece informa??o suficiente para p?r em prova a varia??o das constantes fundamentais da natureza e similarmente da taxa de expans?o do universo. A an?lise da variabilidade das curvas de luz desses corpos, e a consequente precis?o das suas periodicidades, ? de suma import?ncia pois proporciona uma efic?cia nas observa??es deles, possibilita uma maior compreens?o dos seus fen?menos f?sicos, e torna fact?vel a realiza??o de observa??es espectrais em datas mais exatas (momentos nos quais suas curvas de luz apresentam picos acentuados e, por conseguinte, espectros mais ricos em informa??o). Na presente disserta??o, vinte e oito curvas de luz do quasar 3C 273 s?o estudadas, abrangendo todas as faixas do espectro eletromagn?tico (da emiss?o r?dio aos raios gama), totalizando na an?lise de quatro curvas de luz para cada faixa. Aplicamos o m?todo da Transformada Wavelet Cont?nua do tipo Morlet de ordem w = 06 e obtivemos resultados precisos e coerentes com a literatura. / Discovered in 1963, 3C 273 was the second quasar identified and cataloged in the Third
Cambridge Catalog for radio sources, and the first one for which emission lines were identified
with a hydrogen sequence redshifted. It is the brightest quasar of the celestial sphere, the most
studied, analyzed, and with a resulting abundance of data available in a vast literature. The accurate
analysis of the deviations of the spectral lines of quasars provides enough information to put
in evidence the variation of fundamental constants of nature and similarly the universe expansion
rate. The analysis of the variability of the light curves of these bodies, and the consequent accuracy
of their periodicity, is of utmost importance as it provides an efficiency of their observations, enables
a greater understanding of the physical phenomena, and makes it possible to conduct spectral
observations on more accurate dates (when their light curves show pronounced peaks and therefore
richer spectra information). In this master?s thesis twenty eight light curves from the quasar 3C
273 are studied, covering all the electromagnetic spectrum wavebands (radio emission to gamma
rays), totaling in the analysis of four light curves for each waveband. We have applied the method
of Continuous Wavelet Transform using the sixth-order (!0 = 6) Morlet wavelet function, and
obtained excellent results in accordance with the literature.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/20801 |
| Date | 14 September 2015 |
| Creators | Rocha, Nathalia Mattos Novaes da |
| Contributors | 96670193491, http://lattes.cnpq.br/2673267660389058, Medeiros, Jos? Renan de, 08896135400, http://lattes.cnpq.br/9151590034650501, Dantas, Maria Aldinez, 01286739403, http://lattes.cnpq.br/4109484014804133, Martins, Bruno Leonardo Canto |
| Publisher | Universidade Federal do Rio Grande do Norte, PROGRAMA DE P?S-GRADUA??O EM F?SICA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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