Complex emission line region of Mrk 817

Abstract

In this work we study the physical and kinematical properties of the emission line region of Seyfert 1.5 galaxy Mrk 817 using three sets of observations, among which are high-resolution spectra obtained with the Isaac Newton Telescope on Canary Islands. We find that in Mrk 817 the Narrow (NEL) and Broad Emission Lines (BEL) are very complex, indicating that structure of both the Narrow (NLR) and Broad Line Region (BLR) is complex and consists of at least two sub-regions with different kinematical properties. We find that the BEL can be fitted with the two-component model, where the core of the line is coming from a spherical region with isotropic velocity distribution, and wings might be affected by a low inclined accretion disc (or disc-like emitting region). Also, we discuss the physical properties of the BLR. Moreover, we find that an outflow is present in the NLR, that may be driven by an approaching jet.

arXiv comment7 pages, 9 figures, accepted for publication in MNRAS

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• Reverberation Mapping Measurements of Black Hole Masses and Broad-Line Region Kinematics in Mrk 817 and NGC 7469
• Spectral optical monitoring of 3C 390.3 in 1995-2007: II. Variability of the spectral line parameters
• The analysis of the hydrogen broad Balmer line ratios: possible implications to the physical properties of the BLR of AGN
• A flare in the optical spotted in the changing-look Seyfert NGC 3516
• Complex Broad Emission Line Profiles of AGN - Geometry of the Broad Line Region
• Virilization of the Broad Line Region in Active Galactic Nuclei - connection between shifts and widths of broad emission lines
• Line shape variability in a sample of AGN with broad lines
• Unravelling the nature of the dual AGN in the galaxy pair system IRAS 05589+2828 and 2MASX J06021107+2828382
• The Broad Line Region of AGN: Kinematics and Physics