Seyfert 1 mutation of the classical Seyfert 2 nucleus NGC 7582
Astrophysics
2009-10-31 v1
Abstract
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.
Keywords
Cite
@article{arxiv.astro-ph/9905147,
title = {Seyfert 1 mutation of the classical Seyfert 2 nucleus NGC 7582},
author = {Itziar Aretxaga and B. Joguet and D. Kunth and J. Melnick and R. J. Terlevich},
journal= {arXiv preprint arXiv:astro-ph/9905147},
year = {2009}
}
Comments
Ap.J.Lett., in press. Also available at http://www.inaoep.mx/~itziar