Seyfert 1 mutation of the classical seyfert 2 nucleus ngc 7582 - INSPIRE

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Seyfert 1 mutation of the classical seyfert 2 nucleus ngc 7582

May, 1999

Published in:

Astrophys.J.Lett. 519 (1999) L123

e-Print:

astro-ph/9905147 [astro-ph]

DOI:

10.1086/312114

View in:

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Abstract: (arXiv)

We report the transition towards a type 1 Seyfert experienced by the classical type 2 Seyfert nucleus in NGC 7582. The transition, found at most 20 days from its maximum peak, presents a unique opportunity to study these rare events in detail. At maximum the Ha line width is of about 12000 km/s. We examine three scenarios that could potentially explain the transition: capture of a star by a supermassive black hole, a reddening change in the surrounding torus, and the radiative onset of a type IIn supernova exploding in a compact nuclear/circumnuclear starburst.

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