Identifying AGN's Balmer-Absorptions and stratified NLR kinematics in SDSSJ112611.63+425246.4
arXiv:1410.6889 · doi:10.1051/0004-6361/201424848
Abstract
Balmer absorption is a rare phenomenon in active galactic nuclei (AGNs). So far, only seven Balmer-absorption AGNs have been reported in literature. We here report the identification of SDSS\,J112611.63+425246 as a new Balmer-absorption AGN through our spectral analysis, and study the kinematics of its narrow emission-line region (NLR). We model the continuum by a linear combination of a starlight component, a powerlaw from the central AGN and the emission from the FeII complex. After the subtraction of the modeled continuum, each emission/absorption line is profiled by a sum of multi Gaussian functions. All the line shifts are determined with respect to the modeled starlight component. By using the host starlight as a reference for the local system, both H and H show AGN's absorptions with a blueshift of . We identify a strong anti-correlation between the inferred velocity shifts and ionization potential for various narrow emission lines, which suggests a stratified NLR kinematics. A de-accelerated outflow is implied for the inner NLR gas, while an accelerated inflow for the outer NLR gas. This complicated NLR kinematics additionally implies that AGN's narrow emission lines, even for the low-ionized lines, might not be a reliable surrogate for the velocity of the local system.
Accepted by A&A, 5 pages, 3 figure 3 and 1 table
References in corpus (12)
- A Semi-Analytic Model for the Co-evolution of Galaxies, Black Holes, and Active Galactic Nuclei
- Star formation efficiency in galaxy interactions and mergers: a statistical study
- A New Sample of Low-mass Black Holes in Active Galaxies
- On the nature of Seyfert galaxies with high [OIII]5007 blueshifts
- Mapping of the molecular gas inflow towards the Seyfert nucleus of NGC4051 using Gemini NIFS
- A Systematic Analysis of Fe II Emission in Quasars: Evidence for Inflow to the Central Black Hole
- Nuclear spirals as feeding channels to the Supermassive Black Hole: the case of the galaxy NGC 6951
- Streaming Motions Towards the Supermassive Black Hole in NGC 1097
- Variability and the X-ray/UV ratio of Active Galactic Nuclei
- A Balmer-line Broad Absorption Line Quasar
- Discovery of H alpha absorption in the unusual broad absorption line quasar SDSS J083942.11+380526.3
- Evolutionary Implications from SDSSJ085338.27+033246.1: A Spectacular N arrow-Line Seyfert 1 Galaxy with Young Post-starburst