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Table 3

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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