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Table 6

Red supergiants with an observed mass-loss rate derived from observations of the gas (gas).

Name L     T eff gas (deJ) (VL)
(1) (2)     (3)    (4)    (5)    (6)   

α Ori 56 000 3800 1.5 1.0 (8)
α Sco 71 000 3550 1.0 1.2 (16)
S Per 86 000 3500 7.5 1.5 21
PZ Cas 193 000 3600 8.3 6.5 42
VY CMa 295 000 3435 40.0 18 88
NML Cyg 320 000 3310 140.0 21 120
VX Sgr 340 000 3575 11.0 32 79
μ Cep 410 000 3700 5.0 67 (78)

Notes. Column 5 is the de Jager rate, and Col. 6 is the rate with the van Loon recipe, which is applicable only for dusty stars (rates in parentheses should not be considered). Mass-loss rates are given in units of 10-6  M yr-1.

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