Footprints of an active galactic nucleus - The nuclear zone of NGC 1068

Astronomy and Astrophysics – Astronomy

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Active Galactic Nuclei, Astronomical Spectroscopy, Spiral Galaxies, Emission Spectra, Galactic Structure, Gray Scale, H Alpha Line, Nebulae, Oxygen, Seyfert Galaxies

Scientific paper

NGC 1068 is a spiral galaxy that hosts an extremely luminous active nucleus imbedded in an unusually bright gaseous medium. The galaxy is nearby and, unlike Cen A, its near-nuclear region is plainly visible. Therefore the galaxy presents an exceptionally propitious opportunity to separate clues to the origin of nuclear activity from the disruptions resulting from this activity. The many observational data, including new, deep emission-line images and long-slit spectra, are reviewed with this aim. Though no firm conclusions emerge, a variety of important new and potentially viable research directions are identified. NGC 1068 appears to be a hybrid Seyfert/starburst galaxy.

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