Open AccessLongslit spectroscopy of the peculiar Seyfert 2 galaxy HRG 10103
Author(s) -
P. C. R. Poppe,
Vera Aparecida Fernandes Martin,
M. Faúndez-Abans,
M. de Oliveira-Abans,
Iranderly Fernandes de Fernandes
Publication year - 2010
Publication title -
sitientibus. série ciências físicas
Language(s) - English
Resource type - Journals
eISSN - 2675-3286
pISSN - 1984-5812
DOI - 10.13102/sscf.v6i.5299
Subject(s) - physics , astrophysics , galaxy , redshift , spectroscopy , emission spectrum , spectral line , ionization , spiral galaxy , line (geometry) , astronomy , geometry , ion , mathematics , quantum mechanics
We present the rst optical longslit spectroscopy for the galaxy HRG 10103, an Sa(r) type peculiar galaxy seen face-on with an asymmetrical elliptical structure. The main goal of this work is to provide the spectral classication of the current object using the `traditional' diagnostic diagrams. However, we also present a diagnostic involving the known emission line ratio R23, usually used to estimate the O/H abundance ratio. The idea is to make a better distinction between the narrow-line AGNs and the H II galaxies. The spectra were obtained in two observatories (OPD-LNA/MCT and Gemini-South) and includes some of the most important emission lines for ionization diagnostic. Based on the observed spectra, HRG 10103 is a Seyfert 2 galaxy with typical line-ratios values in the optical range. We have estimated nuclear redshift of z = 0.039. The resulting reddening values as a function of distance from the nucleus are presented too. The errors in the fluxes were mostly caused by uncertainties in the placement of the continuum level. The rotation curve is typical of spiral disks, rising shallowly and attening at an observed amplitude of about 200 km s^(-1). Some other physical parameters have been derived whenever possible. The spectroscopic data reduction was carried out using the GEMINI.GMOS package as well as the standard IRAF procedures.