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Spectrum of HII region -014+081 in NGC 4254
Observational evidence of the presence of hot and massive "Wolf-Rayet" stars in a metal-rich H II region (designated "-014+081") in the spiral galaxy NGC 4254, a member of the Virgo cluster of galaxies at a distance of about 50 million light-years. Comparison spectra of two types of Wolf-Rayet stars (WC and WN) in the Milky Way galaxy are shown. The characteristic spectral features of ionized helium (He II) and double and triple ionized carbon (C III, C IV) are identical.
Kilde:ESO
Om billedet
Id: | eso0223c |
Type: | Observation |
Udgivelsesdato: | 23. august 2002 |
Relaterede pressemeddelelser: | eso0223 |
Størrelse: | 1206 x 681 px |
Om objektet
Navn: | NGC 4254 |
Type: | Local Universe : Star : Type : Wolf-Rayet Local Universe : Nebula : Appearance : Emission : H II Region Local Universe : Galaxy : Type : Spiral |
Afstand: | 50 million lysår |
Kategori: | Galaxies Nebulae Stars |
Farver & filtre
Bånd | Teleskop |
---|---|
Optisk | Very Large Telescope FORS1 |