Constraints on a strong X-ray flare in the Seyfert galaxy MCG-6-30-15

Details Constraints on a strong X-ray flare in the Seyfert galaxy MCG-6-30-15 Constraints on a strong X-ray flare in the Seyfert galaxy MCG-6-30-15

2007-02-26

arxiv.org/abs/astro-ph/0702686v1

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures, proceedings of a talk given at the symposium 238 at the IAU General Assembly 2006

Scientific paper

10.1017/S1743921307004772

We discuss implications of a strong flare event observed in the Seyfert galaxy MCG-6-30-15 assuming that the emission is due to localized magnetic reconnection. We conduct detailed radiative transfer modeling of the reprocessed radiation for a primary source that is elevated above the disk. The model includes relativistic effects and Keplerian motion around the black hole. We show that for such a model setup the observed time-modulation must be intrinsic to the primary source. Using a simple analytical model we then investigate time delays between hard and soft X-rays during the flare. The model considers an intrinsic delay between primary and reprocessed radiation, which measures the geometrical distance of the flare source to the reprocessing sites. The observed time delays are well reproduced if one assumes that the reprocessing happens in magnetically confined, cold clouds.

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