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)

Abstract

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).

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Copyright information

© IAU 1982

Authors and Affiliations

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

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