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A Possible Mechanism to Explain the Narrow Line Variability of Seyfert Galaxies on Timescales of Months

Published online by Cambridge University Press:  04 August 2017

Nikolay G. Bochkarev
Nikolay G. Bochkarev*
Affiliation:
Sternberg State Astronomical Institute Moscow USSR

Abstract

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Gas in the shadow of clouds in the outer parts of the broad line region can radiate a considerable fraction (dozens of percent) of the narrow emission line flux. The variability of the X-ray luminosity of the central source should result in significant variations of the gas emission on a timescale of months. Particularly strong changes of line intensities and column densities of gas in the shadow (~ 1023 cm−2) can be produced by phase transfer between two thermally stable fluids with temperatures 10–20×103 K and 40–100×103 K, which can exist in the shadow of clouds.

Type
IV. Variability
Information
Symposium - International Astronomical Union , Volume 121: Observational Evidences of Activity of Galaxies , 1987 , pp. 223 - 226
Copyright
Copyright © Reidel 1987 

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