Análise wavelet da variabilidade do quasar 3C 273
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, analyze...
Na minha lista:
| Autor principal: | |
|---|---|
| Outros Autores: | |
| Formato: | Dissertação |
| Idioma: | por |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
|
| Assuntos: | |
| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/20801 |
| Tags: |
Adicionar Tag
Sem tags, seja o primeiro a adicionar uma tag!
|
| Resumo: | 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. |
|---|