Bibcode
Diaz, A. I.; Prieto, M. A.; Wamsteker, W.
Referencia bibliográfica
Astronomy and Astrophysics (ISSN 0004-6361), vol. 195, no. 1-2, April 1988, p. 53-59.
Fecha de publicación:
4
1988
Número de citas
41
Número de citas referidas
38
Descripción
The combined UV and optical spectrum of the Seyfert type 2 galaxy NGC
3393 is presented and analyzed together with published IR and IRAS data.
The conditions in the narrow-line gas strongly suggest that the
high-ionization material is in a zone of higher density (Ne = 100,000/cu
cm) while the low-ionization material is at Ne = 1000/cu cm. No evidence
is found for internal reddening. Most of the optical and NIR flux is of
stellar origin, and the IRAS fluxes can be adequately described by dust
emission with two components at temperatures of about 30 K and 130 K,
respectively. This dust would probably be located in the regions
surrounding the Seyfert nucleus. The flux distribution of the nonstellar
component can be fitted by a power law with index alpha = -0.60. This
power law is closer to that observed in quasars and Seyfert type 1
galaxies than to the commonly derived for Seyfert types 2 (alpha =
-1.5).