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 e f f − M b o l 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 20 M ⊙ t o 120 M ⊙ and about 20% of them falls in the mass range above 60 M ⊙ in agreement with earlier findings of Conti et al. (1975).