Program: GS-2007A-Q-72

In this proposal we plan to investigate the physical and kinematical properties of the emission line regions of Seyfert 2 galaxy HRG10103 using three sets of spectroscopic observations with the GMOS-S longslit mode (1.0 arcsec slit width). Fig.1 illustrate the longslit positions drawn on an isophotal map. We will observe each one with two gratings (blue and red), in order to included both numerous emission lines of ionized gas ([OII]3727, [NeIII]3869, [OIII]4959,5007, [OI]6300, [NII]6583, [SII]6716,6731, the Balmer Hb and Ha lines) and absorption features characteristic of galactic stellar population. Our images archives have revealed asymmetrical structures that can be interpreted as a result of a recent interaction with a companion that was most likely followed by its disruption. Therefore, we plan to use the GMOS-S (longslit in different positions) for trace the behavior of gas and stars both in the immediate vicinity of AGN and far from the center. In addition, the method of diagnostic diagrams allow us to determine the type of ionization source in various galactic regions. It is interesting to know whether the radial gas flows toward the galactic center are related to these signs of interaction, or not. In a recent mission devoted to this problem, we obtained direct imaging and longslit spectroscopic observations using the 1.6m telescope at OPD/LNA to check these hypothesis (an interacting system) and to obtain the first one classification for this object (Seyfert of type 2, Martin et al. 2006, data reduced and analysed. Paper in preparation). This proposal can be realised even under poor weather conditions. (HRG: Hertling Ring Galaxy)