A remarkable feature in the giant extragalactic H II region NGC 5471

Details A remarkable feature in the giant extragalactic H II region NGC 5471 A remarkable feature in the giant extragalactic H II region NGC 5471

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...365..164c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 365, Dec. 10, 1990, p. 164-167.

Astronomy and Astrophysics

Astrophysics

28

Astronomical Spectroscopy, H Ii Regions, Interstellar Matter, Line Spectra, Emission Spectra, Forbidden Transitions, H Alpha Line, Stellar Winds, Supernova Remnants

Scientific paper

The discovery of a very high velocity, low-intensity gas feature in the giant extragalactic H II region NGC 5471 is reported. A broad component in the emission lines of H-alpha + forbidden N II 6548, 6584 A is located within an area less than 1 arcsec in diameter at the position known as knot C. The broad component is characterized by its low intensity, a contribution of roughly 25 percent to the total flux of the lines, and an extension of roughly 3300 km/s at full width at zero intensity (FWZI). Supernovae explosions and stellar winds are considered as possible sources of the gas motions, and the observational evidence for their presence is discussed.

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