A spectrophotometric study of the Seyfert 1 galaxy NGC 4253

DOI: 
10.1093/mnras/278.3.737
Publication date: 
01/02/1996
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: 
278
Pages: 
737-748
Abstract: 
CCD spectroscopic observations from [NeV] lambda3425A to [SIII] lambda9532A of the nucleus and circumnuclear region of the Seyfert 1 NGC 4253 are presented. The nucleus shows circumnuclear emission which is elongated 1.5 kpc to the north-east; the spectrum of this extranuclear emission is well fitted by HII region models with effective temperatures of 50000K. The kinematics of the high-excitation gas is perturbed with respect to the low-ionization gas, showing radial motions compatible with an outflow wind. The nucleus is a strong FeII emitter, and its spectrum shows high-excitation lines, such as [FeVII] lambda6086A and [FeX] lambda6374A, which are produced by photoionization in the coronal-line region. Lines produced in high-density and low-ionization conditions, such as OI lambda8446A and MgII lambda9220A, are also detected; we show that these lines are produced by fluorescence with Lybeta. The near-infrared CaII triplet, detected in emission and in absorption, and the FeII emission are discussed in terms of the starburst model developed by Terlevich and collaborators.
Database: 
ADS
URL: 
https://ui.adsabs.harvard.edu/#abs/1996MNRAS.278..737G/abstract
ADS Bibcode: 
1996MNRAS.278..737G
Keywords: 
LINE: IDENTIFICATION;GALAXIES: ACTIVE;GALAXIES: INDIVIDUAL: NGC 4253;GALAXIES: NUCLEI;GALAXIES: SEYFERT