Seyfert 1 mutation of the classical Seyfert 2 nucleus NGC 7582

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.

Ap.J.Lett., in press. Also available at http://www.inaoep.mx/~itziar

References in corpus (5)

• A Hubble Space Telescope Imaging Survey of Nearby Active Glactic Nuclei
• Ultraviolet-Optical observations of the Seyfert 2 Galaxies NGC 7130, NGC 5135 and IC 3639: Implications for the Starburst-AGN Connection
• Spectral Synthesis of the Nuclear Region of Seyfert 2 and Radio Galaxies
• The Stellar Content of Active Galaxies
• ASCA Observations of the Seyfert 2 Galaxy NGC 7582: An Obscured and Scattered View of the Hidden Nucleus

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