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 OALib Journal期刊 ISSN: 2333-9721 费用：99美元

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 相关文章 Simultaneous optical monitoring of BL Lacertae object S5 0716+714 with high temporal resolution Synchrotron and Inverse Compton Variability in the BL Lacertae object S5 0716+714 The optical microvariability and spectral changes of the BL Lacertae object S5 0716+714 Rms-flux relation in the optical fast variability data of BL Lacertae object S5 0716+714 Seven-Year Multi-Color Optical Monitoring of BL Lacertae Object S5 0716+714 Simultaneous B'V'R' Monitoring of BL Lacertae Object S5~0716+714 and Detection of Inter-Band Time Delay Optical-IUE observations of the gamma-ray loud BL Lacertae object S5 0716+714: data and interpretation A Quasi-Periodic Oscillation of ~ 30 Minutes in the X-ray Light Curve of the BL Lac S5 0716+714 Intensive monitoring of the strongly variable BL Lac S5 0716+714 Power Spectral Distribution of the BL Lac Object S5 0716+714 更多...
Physics  2011

# Power Spectral Distribution of the BL Lacertae Object S5 0716+714

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Abstract:

Observational data in the BVRI bands of the variable BL Lacertae Object S5 0716+714 is discussed from the point of view of its Power Spectral Distribution (PSD). Analysis of the noise properties exhibited by the source. Assessment of the validity of a turbulent model. We fitted a model of the type $P(f) = \beta f^{-\alpha} + \gamma$ to the data for two null hypothesis and calculated the Bayesian p parameter for the fits. Different theoretical models are discussed and applied to these data and a special focus is placed on the MagnetoRotational Instability (MRI). The $P(f) = \beta f^{-\alpha}$ fit provides slopes with values ranging from 0.376 to 2.237, with medium values for each band of $\bar{\alpha}_B = 1.756$, $\bar{\alpha}_V = 1.704$, $\bar{\alpha}_R = 1.780$ and $\bar{\alpha}_I = 1.272$ respectively. An interval for the calculated effective $\alpha_{SS}$ parameter is obtained to be $[0.18,1.72]\cdot 10^{-2}$, corresponding to the order of magnitude previously inferred through both observational and numerical investigations. Structure function analysis, fractal dimension analysis and DFT analysis (all performed in other studies) plus our own analysis establish that the source is turbulent in a nontrivial way, i.e. there is "intrinsic" noise superimposed on the deterministic behavior of the source. We propose that embedding a weakly stochastic magnetic field component in the MRI (MagnetoRotational Instability) framework and taking into account stochastic reconnection of magnetic field lines might explain microvariability in AGN objects.

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