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Astron. Astrophys. 355, L31-L33 (2000)

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Letter to the Editor

Dust lanes, thick absorbers, and the unification model for Seyfert galaxies

G. Matt

Università degli Studi Roma Tre, Dipartimento di Fisica "E. Amaldi", Via della Vasca Navale 84, 00146 Roma, Italy

Received 4 January 2000 / Accepted 20 February 2000


A modification of the popular unification model for Seyfert galaxies is proposed, which takes into account recent observational findings on the statistical properties of both type 1 and type 2 Seyferts.

In the proposed scenario, Compton-thick Seyfert 2 galaxies are those sources observed through compact, thick matter (the `torus'), while Compton-thin/ intermediate Seyfert galaxies are obscured by dust lanes at larger distances.

Key words: galaxies: Seyfert – X-rays: galaxies

© European Southern Observatory (ESO) 2000

Online publication: March 9, 2000