Investigation of Spectral Characteristics and Statistical Properties of Flicker Noise of the X-Ray Nova A0620-00

Autor:	O. S. Sazhina, I. I. Bulygin, A. M. Cherepashchuk
Rok vydání:	2021
Předmět:	Physics Gaussian Stellar atmosphere Astronomy and Astrophysics Light curve Noise (electronics) symbols.namesake Space and Planetary Science Gamma distribution symbols Astrophysics::Solar and Stellar Astrophysics Flicker noise Statistical physics Random variable Weibull distribution
Zdroj:	Astronomy Reports. 65:839-863
ISSN:	1562-6881 1063-7729
DOI:	10.1134/s1063772921090067
Popis:	Methodological studies of spectral characteristics and statistical analysis of flicker noise are presented on the example of two data samples (2016–2017) on the X-ray nova A0620-00. The results obtained indicate the nature of flicker noise as aperiodic phenomenon in stellar atmospheres and in regions of interaction between stars in binary systems, including phenomena of a flare nature. We showed that flicker noise is described by distributions of non-negative random variables: gamma distribution and Weibull distribution, which makes it related to atmospheric processes in meteorology and geological processes (earthquakes). Modeling of these processes shows structural correspondence to real data (Hurst diagrams), and also indicates the presence of additional unaccounted for noise of a presumably Gaussian nature. The performed studies give recommendations to supplement the models of the light curves of binary astrophysical systems with the gamma distribution and the Weibull distribution.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::28fdaadec29ae50e448a15822859cdff https://doi.org/10.1134/s1063772921090067 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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