Lifetime of the spectroscopic phases of a non-rotating 60 M⊙ star.
|Spectral type||Previous duration||Revised duration|
|(chem. abund., yr )||(spec. class., yr)|
|O||3.00 × 106||3.22 × 106|
|BHG||−||0.79 × 105|
|LBV||−||2.35 × 105|
|WR||3.97 × 105||3.95 × 105|
|WNL||6.13 × 104||0.49 × 104|
|WNE||5.15 × 104||10.31 × 104|
|WC||2.85 × 105||2.57 × 105|
|WO||−||3.77 × 104|
|τLBV,60,0/τO,60,0 = 0.073|
|τWR,60,0/τO,60,0 = 0.120|
|τLBV,60,0/τWR,60,0 = 0.594|
Notes. Column 2 refers to the previous values found using chemical abundance and Teff criteria (from Georgy et al. 2012), while Col. 3 shows the revised durations obtained in this work through a classification of the synthetic spectra from the evolutionary models. The timescales of the LBV (τLBV,60,0), WR (τWR,60,0), and O-type phases (τO,60,0) for a non-rotating 60 M⊙ star are indicated at the bottom of the table.
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