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Slim Disk Model for Narrow-Line Seyfert 1 Galaxies

Shin Mineshige·Mitsuru Takeuchi
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Abstract

We argue that both the extreme soft X-ray excess and the large-amplitude variability of Narrow-Line Seyfert 1 galaxies (NLS1s) can be explained in the framework of the slim disk model. When the disk luminosity approaches the Eddington luminosity, the disk becomes a slim disk, exhibiting a multi-color blackbody spectrum with a maximum temperature, T(bb), of about 0.2 (M/1e5 solar masses)e(-1/4) keV, and size of the X-ray emitting region, r(bb), of about R(S) (the Schwarzschild radius). Furthermore, magnetic energy can be amplified up to a level exceeding radiation energy emitted from the disk, causing substantial variability in X-rays by consecutive magnetic flares.

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Shin Mineshige, Mitsuru Takeuchi. 2000-05-08. Slim Disk Model for Narrow-Line Seyfert 1 Galaxies. https://doi.org/10.1016/s1387-6473(00)00075-0

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