On the light-bending model of X-ray variability of MCG-6-30-15

Details On the light-bending model of X-ray variability of MCG-6-30-15 On the light-bending model of X-ray variability of MCG-6-30-15

2010-06-23

arxiv.org/abs/1006.4552v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

6 pages, PASJ, accepted

Scientific paper

We apply the light bending model of X-ray variability to Suzaku data of the Seyfert 1 galaxy MCG-6-30-15. We analyze the energy dependence of the root mean square (rms) variability, and discuss conditions necessary for the model to explain the characteristic decrease of the source variability around 5-8 keV. A model, where the X-ray source moves radially rather than vertically close to the disk surface, can indeed reproduce the reduced variability near the energy of the Fe Kalpha line, although the formal fit quality is poor. The model then predicts the energy spectra, which can be compared to observational data. The spectra are strongly reflection dominated, and do not provide a good fit to Suzaku spectral data of the source. The inconsistency of this result with some previous claims can be traced to our using data in a broader energy band, where effects of warm absorber in the spectrum cannot be neglected.

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