| Texto completo | |
| Autor(es): |
de Avellar, Marcio G. B.
;
Mendez, Mariano
;
Altamirano, Diego
;
Sanna, Andrea
;
Zhang, Guobao
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Monthly Notices of the Royal Astronomical Society; v. 461, n. 1, p. 79-92, SEP 1 2016. |
| Citações Web of Science: | 7 |
| Resumo | |
While there are many dynamical mechanisms and models that try to explain the origin and phenomenology of the quasi-periodic oscillations (QPOs) seen in the X-ray light curves of low-mass X-ray binaries, few of them address how the radiative processes occurring in these extreme environments give rise to the rich set of variability features actually observed in these light curves. A step towards this end comes from the study of the energy and frequency dependence of the phase lags of these QPOs. Here we used a methodology that allowed us to study, for the first time, the dependence of the phase lags of all QPOs in the range of 1-1300 Hz detected in the low-mass X-ray binary 4U 1636-53 upon energy and frequency as the source changes its states as it moves through the colour-colour diagram. Our results suggest that within the context of models of up-scattering Comptonization, the phase lags dependences upon frequency and energy can be used to extract size scales and physical conditions of the medium that produces the lags. (AU) | |
| Processo FAPESP: | 13/26258-4 - Matéria superdensa no universo |
| Beneficiário: | Manuel Máximo Bastos Malheiro de Oliveira |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 11/23996-9 - Estrelas compactas em binárias: investigando a composição da matéria superdensa |
| Beneficiário: | Marcio Guilherme Bronzato de Avellar |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |