A kinematic signature of bipolar flow in the Seyfert galaxy NGC 3516

A kinematic signature of bipolar flow in the Seyfert galaxy NGC 3516

A long-slit echellogram of the circumnuclear emission-line region in the Seyfert 1 galaxy NGC 3516 reveals an unusual velocity field in the ionized gas. The radial velocities decline outward, from offsets of a few hundred km/s back toward the systemic velocity, over distances of about 500 pc on both...

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Veröffentlicht in:Astron. J.; (United States) 1987-09, Vol.94, p.640-643
Hauptverfasser: Goad, Jean W., Gallagher, John S., III
Format: Artikel
Sprache:eng
Schlagworte:
640105 - Astrophysics & Cosmology- Galaxies
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
EMISSION SPECTRA
FLUID FLOW
FLUIDS
GALAXIES
GALAXY NUCLEI
GAS FLOW
GASES
IONIZED GASES
MATHEMATICAL MODELS
RADIAL VELOCITY
SEYFERT GALAXIES
SPECTRA
VELOCITY
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Zusammenfassung:A long-slit echellogram of the circumnuclear emission-line region in the Seyfert 1 galaxy NGC 3516 reveals an unusual velocity field in the ionized gas. The radial velocities decline outward, from offsets of a few hundred km/s back toward the systemic velocity, over distances of about 500 pc on both sides of the nucleus. This gas has 'nuclear' emission-line ratios. Circumnuclear gas kinematics in NGC 3516 are most simply modeled by a low-velocity, bipolar outflow from the nucleus. The bipolar-flow model is discussed in terms of observable properties of active galactic nucei. (Author)
ISSN:0004-6256
DOI:10.1086/114499