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

Bibcode
1990ApJ...365..164C
DOI
10.1086/169466
Castaneda, Hector O.; Vilchez, J. M.; Copetti, Marcus V. F.
Bibliographical reference

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

Advertised on:
12
1990
Journal
Astrophysical Journal
Number of authors
3
IAC number of authors
2
Citations
41
Refereed citations
39
Description
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.
Type
Refereed
H II regions
Stellar winds
Supernova remnants

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