Extranuclear high-excitation gas in the starburst galaxy NGC 2782

Details Extranuclear high-excitation gas in the starburst galaxy NGC 2782 Extranuclear high-excitation gas in the starburst galaxy NGC 2782

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...260...67b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 260, no. 1-2, p. 67-76.

Astronomy and Astrophysics

Astrophysics

16

Active Galactic Nuclei, Emission Spectra, Gas Dynamics, Starburst Galaxies, Astronomical Spectroscopy, Line Spectra, Spatial Distribution

Scientific paper

We present spatially resolved optical spectra of the starburst galaxy NGC 2782. The spectra reveal the presence of an extended emission line nebula 4-8 arcsec south of the central starburst. The nebula is highly excited and has broad blueshifted emission lines. The observed kinematics are consistent with outflow along the minor axis, presumably driven by supernova explosions in the starburst nucleus. The line ratios indicate that the gas in the nebula is ionized by shocks or by local hot young stars. The emission line gas appears to form a shell, which has not yet broken at the top. Our observations are consistent with theoretical models by Tomisaka & Ikeuchi (1988) for a 3 x 10 exp 6 yr old starburst-driven nuclear outflow.

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