Searching for flickering statistics in T CrB

Dobrotka, A.; Hric, L.; Casares, J.; Shahbaz, T.; Martínez-Pais, I. G.; Muñoz-Darias, T.
Bibliographical reference

Monthly Notices of the Royal Astronomical Society, Volume 402, Issue 4, pp. 2567-2574.

Advertised on:
3
2010
Number of authors
6
IAC number of authors
4
Citations
20
Refereed citations
17
Description
We analyse V-band photometry of the aperiodic variability in T CrB. By applying a simple idea of angular momentum transport in the accretion disc, we have developed a method to simulate the statistical distribution of flare durations with the assumption that the aperiodic variability is produced by turbulent elements in the disc. Both cumulative histograms with Kolmogorov-Smirnov tests, and power density spectra are used to compare the observed data and simulations. The input parameters of the model Rin and α are correlated on a certain interval and the most probable values are an inner disc radius of Rin ~= 4 × 109cm and a viscosity of α ~= 0.9. The disc is then weakly truncated. We find that the majority of turbulent events producing flickering activity are concentrated in the inner parts of the accretion disc.
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