1995The Astronomical JournalRequires access

HI Emission From the Seyfert Galaxies NGC 4051 and NGC 6814

H. S. Liszt, J. M. Dickey

Open publisher page 23 citations

Abstract

We used the VLA-D configuration to synthesize the spatial distribution of λ 21 cm emission from the well-known Seyfert galaxies NGC 4051 and 6814. Both systems are characterized by an annular distribution of atomic gas but that in 4051 is generally much more regular, and more nearly contiguous with the optical image; still, it may be warped at large radii, as evidenced by the presence of a second, weaker kinematic component along the major axis. The gas disk of NGC 6814 is much larger than the optical image, which sits entirely within the central H I depression, and is substantially kinematically warped outside the optical image in the main body of the galaxy.

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What this paper is about

We used the VLA-D configuration to synthesize the spatial distribution of λ 21 cm emission from the well-known Seyfert galaxies NGC 4051 and 6814. Both systems are characterized by an annular distribution of atomic gas but that in 4051 is generally much more regular, and more nearly contiguous with the optical image; still, it may be warped at large radii, as evidenced by the presence of a second, weaker kinematic component along the major axis. The gas disk of NGC 6814 is much larger than the optical image, which sits entirely within the central H I depression, and is substantially kinematically warped outside the optical image in the main body of the galaxy.

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Available abstract

We used the VLA-D configuration to synthesize the spatial distribution of λ 21 cm emission from the well-known Seyfert galaxies NGC 4051 and 6814. Both systems are characterized by an annular distribution of atomic gas but that in 4051 is generally much more regular, and more nearly contiguous with the optical image; still, it may be warped at large radii, as evidenced by the presence of a second, weaker kinematic component along the major axis. The gas disk of NGC 6814 is much larger than the optical image, which sits entirely within the central H I depression, and is substantially kinematically warped outside the optical image in the main body of the galaxy.

Key concepts: Physics, Astrophysics, Galaxy, Hubble sequence, Astronomy, Elliptical galaxy

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