NGC 604 — A Giant H II Region Dominated by Many WR Stars

  • M. Rosa
  • S. D’Odorico
Part of the International Astronomical Union/Union Astronomique Internationale book series (IAUS, volume 99)


NGC 604, the largest H II region in M 33, is comparable in many respects (eg. ionized mass, total extent of a few hundered pc) with the giant H II complex 30 Doradus of the LMC. Recently D’Odorico and Rosa (1981) discovered broad WR emission features at 4640 Å, 4660 Å, He II 4686 Å and 5812 Å in a number of the bright knots in the core of NGC 604. In that paper it was concluded, that about 50 WR stars, mainly of the transition type WN 7 but WC characteristica seen as well, are present in the H II region. These findings were confirmed by the observations by Conti and Massey (1981).


  1. Benvenuti, P., D’Odorico, S.,Dumontel, M.:1979,Astr.Sp.Sc.66,p.39CrossRefADSGoogle Scholar
  2. Conti, P.S., Massey, P.:1981,ApJ 249,p.417CrossRefADSGoogle Scholar
  3. D’Odorico, S., Rosa, M.:1981,ApJ 248,p.1015CrossRefADSGoogle Scholar
  4. Dyson,J.E.:1977,Astron.Astrophys. 59, p.161ADSGoogle Scholar
  5. Elmegreen,B.G.,Lada,C.J.:1977,ApJ 214,p.725CrossRefADSGoogle Scholar
  6. Israel,F.P.,Gatley,I.,Matthews,K.,Neugebauer,G.:1981,Astron.Astrophys. in pressGoogle Scholar
  7. Maeder,A.:1981,Astron.Astrophys. 102, p.401ADSGoogle Scholar
  8. Melnick,J.:1980,Astron.Astrophys. 86,p.304ADSGoogle Scholar
  9. Rosa,M.:1980,Astron.Astrophys. 85,L21ADSGoogle Scholar
  10. Rosa,M.,D’Odorico,S.:1981,Astron.Astrophys. acceptedGoogle Scholar
  11. Smith,M.G.,Weedman,D.W.:1970,ApJ 161,p.33CrossRefADSGoogle Scholar
  12. Willis,A.J.:1980 in ‘Second European IUE Conference’, ESA SP 157,p.(il)Google Scholar

Copyright information

© IAU 1982

Authors and Affiliations

  • M. Rosa
    • 1
  • S. D’Odorico
    • 2
  1. 1.Landessternwarte KoenigstuhlHeidelbergGermany
  2. 2.European Southern ObservatoryGarchingGermany

Personalised recommendations