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The stellar population in the Wolf-Rayet knot in NGC 5430
Ultraviolet and optical spectra and optical imaging were obtained inorder to probe the stellar population in the NGC 5340 WR knot andclarify its relation to star formation elsewhere in the galaxy. Thebarred spiral NGC 5340 contains an extremely luminous H II regionshowing very strong He II and N III Wolf-Rayet emission features. Fromspectrophotometry over the range from 1200-7000 A limits on thereddening and effective temperature have been derived: T eff is between25,000 and 35,000 K. No UV emission lines are clearly detected. TheH-alpha linewidth implies a very short timescale for star formationhere.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Av Kopekleri |
| Sað Açýklýk: | 12h41m20.65s |
| Yükselim: | +50°24'57.5" |
| Görünürdeki Parlaklýk: | 9.342 |
| özdevim Sað Açýklýk: | -78.7 |
| özdevim Yükselim: | 5.1 |
| B-T magnitude: | 9.941 |
| V-T magnitude: | 9.392 |
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