3 Correlation between stellar populations in M 33
نویسنده
چکیده
A method for identification of stellar complexes in M 33 is applied. Several OB associations form a stellar complex with mean size of 0.3-1 kpc. We apply a correlation technique to compare different stellar populations in M 33. Our results confirm the existence of a strong correlation between OB stars, H II regions and WR stars, which trace the regions of massive star formation. There is a good correlation between red supergiants (RSGs) and WR stars in the spiral arms of M 33. This can be expected since the progenitors of WR stars are massive OB stars or RSGs with masses M ≥ 20M⊙. The massive RSGs and WR stars probably originate from nearby sites of star formation. We consider this fact as a ground for identification of stellar complexes in M 33. The presented method for identification of stellar complexes can be applied to other nearby galaxies.
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