A Study on Masses of O Stars in HII Regions

HII 영역내(領域內)의 O형(型) 별의 질량(質量)에 관(關)한 연구(硏究)

Making use of log $T_{eff}-M_{bol}$ diagram along with Stohers' stellar evolutionary tracks (1972), we estimated the masses of 107 O stars in HII regions, which were selected from the catalogue compiled by Goy (1973). It is found that our estimated masses of O stars range from $20M_{\odot}\;to\;120M_{\odot}$ and about 20% of them falls in the mass range above $60M_{\odot}$ in agreement with earlier findings of Conti et al. (1975).