The Stellar Content of Obscured Galactic Giant H II Regions

Details The Stellar Content of Obscured Galactic Giant H II Regions The Stellar Content of Obscured Galactic Giant H II Regions

1998-12-03

arxiv.org/abs/astro-ph/9812070v1

Astronomy and Astrophysics

Astrophysics

22 pages (LaTex), including 7 figures (eps)

Scientific paper

10.1086/300791

Near infrared images of the Galactic giant HII region W43 reveal a dense stellar cluster at its center. Broad band JHK photometry of the young cluster and K-band spectra of three of its bright stars are presented. The 2 micron spectrum of the brightest star in the cluster is very well matched to the spectra of Wolf-Rayet stars of sub-type WN7. Two other stars are identified as O type giants or supergiants by their NIII and CIV emission. The close spatial clustering of O and the hydrogen WN type stars is analogous to the intense star burst clusters R136 in the Large Magellanic Cloud and NGC3603 in the Galaxy.

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