Origin of the Gas in the Extended Narrow-Line Region of Nearby Seyfert Galaxies: The Case of Mrk 6

AbstractIonization cones are one of the most important pieces of evidence supporting the AGN unified model (Antonucci & Miller 1985; Urry & Padovani 1995). Until now, the physical processes at work in the cones are not completely understood. A still open question concerns the origin of the gas. To study the origin of the ionized gas, we first selected a sample of nearby (z<0.03) Seyfert galaxies showing extended [O iii] λ5007 emission. We then observed these galaxies with the MultiPupil Fiber Spectrograph (MPFS) at the 6-m telescope of the Special Astrophysical Observatory (Russia). Here we present very preliminary results on the properties of the narrow-line region (NLR) of the intermediate Seyfert galaxy Mrk 6.

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Substructures in the Narrow-Line Region of AGN

Symposium - International Astronomical Union ◽

10.1017/s0074180900141154 ◽

1989 ◽

Vol 134 ◽

pp. 312-313

Author(s):

Sylvain Veilleux

Keyword(s):

High Resolution ◽

Emission Line ◽

Seyfert Galaxies ◽

Narrow Line ◽

Line Profiles ◽

Preliminary Results ◽

Line Region ◽

Narrow Line Region ◽

Narrow Emission ◽

Resolution Study

The preliminary results of a high-resolution study of narrow emission-line profiles in bright Seyfert galaxies are reported. Profile substructures such as secondary peaks and shoulders are observed in nearly all the objects. The results of profile comparisons in Mrk 359, Mrk 533, and Mrk 1066 are briefly discussed.

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The Narrow Line Region in 3D: mapping AGN feeding and feedback

Proceedings of the International Astronomical Union ◽

10.1017/s1743921314009648 ◽

2014 ◽

Vol 10 (S309) ◽

pp. 190-195 ◽

Cited By ~ 1

Author(s):

Thaisa Storchi Bergmann

Keyword(s):

Seyfert Galaxies ◽

Molecular Gas ◽

Narrow Line ◽

Ionized Gas ◽

Gas Kinematics ◽

Integral Field Spectroscopy ◽

Line Region ◽

The Galaxy ◽

Mass Outflow ◽

Narrow Line Region

AbstractEarly studies of nearby Seyfert galaxies have led to the picture that the Narrow Line Region is a cone-shaped region of gas ionized by radiation from a nuclear source collimated by a dusty torus, where the gas is in outflow. In this contribution, I discuss a 3D view of the NLR obtained via Integral Field Spectroscopy, showing that: (1) although the region of highest emission is elongated (and in some cases cone-shaped), there is also lower level emission beyond the “ionization cone”, indicating that the AGN radiation leaks through the torus; (2) besides outflows, the gas kinematics include also rotation in the galaxy plane and inflows; (3) in many cases the outflows are compact and restricted to the inner few 100pc; we argue that these may be early stages of an outflow that will evolve to an open-ended, cone-like one. Inflows are observed in ionized gas in LINERs, and in warm molecular gas in more luminous AGN, being usually found on hundred of pc scales. Mass outflow rates in ionized gas are of the order of a few M⊙ yr−1, while the mass inflow rates are of the order of tenths of M⊙ yr−1. Mass inflow rates in warm molecular gas are ≈ 4–5 orders of magnitude lower, but these inflows seem to be only tracers of more massive inflows in cold molecular gas that should be observable at mm wavelengths.

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