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A Scaling Law for Magnetic Flux Tubes on an AGN Accretion Disk

  • A. M. K. LeRoux (a1), D. W. Longcope (a1) and S. Tsuruta (a1)

Abstract

An ASCA observation of Seyfert galaxy NGC 3227 showed flares with a linear increase and exponential decrease similar to that of solar flares. We derive a scaling law relating the loop length of a magnetic flux tube to rise and decay times of the flare using cooling mechanisms suitable for the central engine of a Seyfert galaxy. The predicted loop lengths are consistent with physical constraints on the plasma dynamics, suggesting that the same mechanism which explains solar flares may explain variability in Seyfert galaxies.

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References

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DiMatteo, T. 1998, MNRAS, 299, L1.
Fisher, G. H., & Hawley, S. L. 1990, ApJ, 357, 243.
Hawley, S. L., et al. 1995, ApJ, 453, 464.
LeRoux, A. M. K., Longcope, D. W., Fisher, G. H., & Tsuruta, S., in preparation.
Lin, R. P., & Hudson, H. S. 1976, Solar Phys., 50, 153.
Rosner, R., Tucker, W. H., & Vaiana, G. S. 1978, ApJ, 220, 643.

A Scaling Law for Magnetic Flux Tubes on an AGN Accretion Disk

  • A. M. K. LeRoux (a1), D. W. Longcope (a1) and S. Tsuruta (a1)

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