Kinetics and ionization of extended gas in active galaxies. II. A circumnuclear starburst in the type 1 Seyfert NGC 7469

Journal Article · Sat Nov 01 04:00:00 EST 1986 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/164669· OSTI ID:6597934

Wilson, A S; Baldwin, J A; Sun, S D; Wright, A E

Long-slit, high-dispersion mapping of the emission lines H-beta, forbidden O III 4959 A, 5007 A, H-alpha, and forbidden N II 6548 A, 6584 A in the circumnuclear regions of the type I Seyfert galaxy NGC 7469 is reported. The spatially extended, emission line gas is found to be made up of two components. One is highly excited, shows velocities preferentially blue-shifted with respect to systemic, has emission line profiles with blueward-slanting asymmetries, and is dominated kinematically by radial motions. The second component probably comprises H II regions photoionized by hot stars, is of low excitation, emits narrow lines, and follows normal rotational motion in or parallel to the plane of the galaxy. Dust heated by the circumnuclear starburst in NGC 7469 may contribute a substantial fraction, or even all, of the luminous mid/far-infrared radiation from the galaxy. 72 references.

• Research Organization: Hawaii Univ., Honolulu; Cambridge Univ., England; Maryland Univ., College Park; Australian National Radioastronomy Observatory, Parkes, Australia
• OSTI ID: 6597934
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 310; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BALMER LINES
COSMIC DUST
COSMIC GASES
COSMIC RADIO SOURCES
DUSTS
EMISSION SPECTRA
FLUIDS
GALAXIES
GASES
H2 REGIONS
IONIZATION
NEBULAE
SEYFERT GALAXIES
SPECTRA