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Table 1

Properties of the outer layers in a 20 M and 60 M model main-sequence stars of solar metallicity at ages 6.41 × 106  yr and 2.37 × 106  yr respectively, corresponding to about 90% and 80% of the main-sequence lifetime.

Mini R   RFeCZa ΔRFeCZb HPc 3cd ρe ΔMFeCZf ΔMtopg τturnh τconvi j
M R R R R km s-1 g cm-3 M M days days M   yr-1

20 10.46 10.20 0.28 0.08–0.24 10.74 7.4 × 10-8 3.6 × 10-6 5.8 × 10-7 0.53 18 250 7.3 × 10-8
60 22.04 21.34 2.84 0.23–1.93 69.26 6.2 × 10-9 1.6 × 10-5 9.8 × 10-7 0.61 1570 3.7 × 10-6

Notes. 

(a)

Radial coordinate of the top of the FeCZ.

(b)

Radial extension of the FeCZ.

(c)

Pressure scale height at top/bottom of the FeCZ.

(d)

Maximum of the convective velocity inside the FeCZ.

(e)

Density at 3c.

(f)

Mass contained in the convective region.

(g)

Mass in the radiative layer between the stellar surface and the upper boundary of the convective zone.

(h)

Convective turnover time, τturn: = HP/3c.

(i)

Time that a piece of stellar material spends inside a convective region, τconv: = ΔMFeCZ/.

(j)

Mass-loss rate.

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