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

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

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...310..121w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 310, Nov. 1, 1986, p. 121-135.

Astronomy and Astrophysics

Astronomy

65

Active Galaxies, Astronomical Spectroscopy, Gas Dynamics, Gas Ionization, Interstellar Gas, Nebulae, Seyfert Galaxies, Starburst Galaxies, Emission Spectra, H Alpha Line, H Beta Line, H Ii Regions, Infrared Astronomy

Scientific paper

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.

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