The circumnuclear region in the Seyfert 2 galaxy NGC 5953

DOI: 
10.1093/mnras/281.3.781
Publication date: 
01/08/1996
Main author: 
Gonzalez Delgado, Rosa M.
IAA authors: 
Perez, Enrique
Authors: 
Gonzalez Delgado, Rosa M.;Perez, Enrique
Journal: 
Monthly Notices of the Royal Astronomical Society
Refereed: 
Yes
Publication type: 
Article
Volume: 
281
Pages: 
781-798
Abstract: 
This article presents narrow-band Hα and [OIII] images of the interacting pair of galaxies NGC 5953 (with a Seyfert type 2 nucleus) and NGC 5954 (with a LINER). Long-slit spectroscopy, from [NeV] lambda3425A to [SIII] lambda9532A, at intermediate resolution along position angles 44 deg and 182 deg through the nucleus of NGC 5953, is also presented. Both objects show a recent burst of star formation in the circumnuclear region, more conspicuous in NGC 5953. The HII regions are photoionized by a cluster of stars with effective temperature 42000K the ionized gas has a metallicity of three times the solar value, with an overabundance of nitrogen. In the north-eastern part of the nucleus of NGC 5953 there is extended circumnuclear emission produced by a mixture of low- and high-excitation gas, which is kinematically perturbed; this probably reflects photoionization by stars and by an additional source, which may be identified with radiation escaping from the nucleus and/or ionization related to the radio jet, which has a geometry closely related to the line emission. A problem is identified with the line ratios involving the infrared [SIII] lines, which may reflect a problem with the sulphur atomic parameters, depletion of the sulphur abundance or the inadequacy of one-component photoionization models to reproduce the observed line ratios.
Database: 
ADS
URL: 
https://ui.adsabs.harvard.edu/#abs/1996MNRAS.281..781G/abstract
ADS Bibcode: 
1996MNRAS.281..781G
Keywords: 
GALAXIES: ABUNDANCES;GALAXIES: ACTIVE;GALAXIES: INDIVIDUAL: NGC 5953;GALAXIES: INTERACTIONS;GALAXIES: NUCLEI;GALAXIES: SEYFERT