Imaging spectrophotometry of ionized gas in NGC 1068. I - Kinematics of the narrow-line region

Details Imaging spectrophotometry of ionized gas in NGC 1068. I - Kinematics of the narrow-line region Imaging spectrophotometry of ionized gas in NGC 1068. I - Kinematics of the narrow-line region

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...355...70c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 355, May 20, 1990, p. 70-87.

Astronomy and Astrophysics

Astrophysics

120

Imaging Spectrometers, Ionized Gases, Seyfert Galaxies, Spectral Line Width, Spectrophotometry, Emission Spectra, Fabry-Perot Interferometers, Forbidden Transitions, Plasma Jets

Scientific paper

The kinematics of collisionally excited forbidden N II 6548, 6583 across the inner 1 arcmin diameter of the nearby Seyfert galaxy NGC 1068 is mapped using an imaging Fabry-Perot interferometer and low-noise CCD. The stack of monochromatic images, which spatially resolved the high-velocity gas, was analyzed for kinematic and photometric content. Profiles agree well with previous long-slit work, and their complete spatial coverage makes it possible to constrain the gas volume distribution. It is found that the narrow-line region is distributed in a thick center-darkened, line-emitting cylinder that envelopes the collimated radio jet. Three distinct kinematic subsystems, of which the cylinder is composed, are discussed in detail. Detailed behavior of the emission-line profiles, at the few points in the NE quadrant with simple kinematics, argues that the ionized gas develops a significant component of motion perpendicular to the jet axis.

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