Kinematics and ionization of extended ionized gas in active galaxies. I. The X-ray luminous galaxies NGC 2110, NGC 5506, and MCG -5-23-16

Journal Article · Mon Apr 01 04:00:00 EST 1985 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/163103· OSTI ID:6060681

Wilson, A S; Baldwin, J A; Ulvestad, J S

Direct CCD imaging and long-slit Vidicon spectroscopy have been used to map the emission-line ratios, profiles, and velocity fields over the extended narrow-line regions in three nearby Seyfert galaxies, NGC 2110, NGC 5506, and MCG -5-23-16. The gas in the letter is spatially unresolved. Similarities between the other two nebulae include the excitation mechanism (photoionization by a central nonthermal source) and the overall profiles of the very broad emission lines close to the nucleus. The nebulae are, however, quite different in their global kinematic behavior. In NGC 2110, the gas appears to lie in a disk or flattened spheroid and to be in ordered rotation, with a classical rotation curve, about an axis parallel to the minor axis of the stellar isophotes. The velocity field of NGC 5506 is quite irregular, but a component of rotation in the plane of the galaxy seems to exist. 63 references.

• Research Organization: Maryland Univ., College Park; Observatorio Interamericano de Cerro Tololo, La Serena, Chile; National Radio Astronomy Observatory, Charlottesville, VA
• OSTI ID: 6060681
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 291; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640103* -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC GASES
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
EMISSION SPECTRA
FLUIDS
GALAXIES
GASES
INTERSTELLAR SPACE
IONIZATION
MORPHOLOGY
MOTION
NEBULAE
ROTATION
SEYFERT GALAXIES
SPACE
SPECTRA