Initial Mass Functions of Massive Stars in OB Associations

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

We derived initial mass functions (IMF) of massive stars in three different regions of spiral arms within 2.5 kpc from the sun. The derived IMF slope beta of local arm stars is found to be -2.09 - -2.06, very close to that of Bisiacchi et al. (1983). For Saggittarius-Carina arm stars beta ranges from -1.77 to -1.72 which is close to that of overall stars given by Garmany et al.(1982). Possible causes inducing the regional difference in IMFs are discussed.

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