NGC 985 - Extended ionized regions and the far-infrared luminosity of a ring-shaped Seyfert galaxy

Astronomy and Astrophysics – Astronomy

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Far Infrared Radiation, Galactic Radiation, Galactic Structure, H Alpha Line, H Ii Regions, Seyfert Galaxies, Star Formation, Astronomical Spectroscopy, Emission Spectra, Infrared Astronomy, Ionized Gases, Narrowband

Scientific paper

Narrow-band H-alpha images and long-slit spectroscopy of the Seyfert galaxy NGC 985 are presented. Large-scale extended ionized zones are seen to cover a significant fraction of the ring of this object. These ionized zones are responsible for a considerable fraction (greater than 35 percent) of the far-infrared emission of NGC 985. These ionized zones are interpreted as giant H II region complexes, formed in a recent burst of star formation. It is also argued that that starburst was triggered by a galaxy interaction.

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