Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2011-10-26
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
This paper has been withdrawn by the author due to some changes requested by the referee prior to acceptance. The author will
Scientific paper
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.
Marcu Alexandru
Mocanu Gabriela-Raluca
No associations
LandOfFree
Power Spectral Distribution of the BL Lacertae Object S5 0716+714 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Power Spectral Distribution of the BL Lacertae Object S5 0716+714, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power Spectral Distribution of the BL Lacertae Object S5 0716+714 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-716990