Thunderclouds and accretion discs : a model for the spectral and temporal variability of Seyfert 1 galaxies

@inproceedings{Merloni2001ThundercloudsAA,
  title={Thunderclouds and accretion discs : a model for the spectral and temporal variability of Seyfert 1 galaxies},
  author={A. Merloni and Andrew C. Fabian},
  year={2001}
}
X-ray observations of Seyfert 1 galaxies offer the unique possibility of observing spectral variability on timescales comparable to the dynamical time of the inner accretion flow. They typically show highly variable lightcurves, on a wide range of timescales, with Power Density Spectra characterized by ‘red noise’ and a break at low frequencies. On the other hand, time resolved spectral analysis have established that spectral variability on the shortest timescales is important in all these… CONTINUE READING

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