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Table A.2.

ALMA 3-mm upper limits for stars that are undetected.

Spectral type Source Upper limits
Flux density (Jy) Mass-loss rate
O9Iab W24 < 1.16e−04 < 6.04e−06
W35 < 9.16e−05 < 5.08e−06
W38 < 1.23e−04 < 6.33e−06
W41 < 1.22e−04 < 6.28e−06
O9Ib W15 < 1.04e−04 < 5.68e−06
W29 < 9.38e−05 < 5.26e−06
W37 < 1.61e−04 < 7.89e−06
W43c < 6.92e−05 < 4.19e−06
O9.5Iab W61b < 6.13e−05 < 3.75e−06
W74 < 6.23e−05 < 3.80e−06
W2019 < 1.65e−04 < 7.89e−06
O9.5Ib W46b < 7.20e−05 < 4.13e−06
W56b < 6.06e−05 < 3.63e−06
W65 < 6.11e−05 < 3.65e−06
W84 < 6.91e−05 < 4.00e−06
W86 < 1.43e−04 < 7.10e−06
W2017 < 6.40e−05 < 3.78e−06
W2028 < 1.16e−04 < 5.92e−06
W3005 < 1.32e−04 < 6.50e−06
B0Ia W31 < 1.02e−04 < 4.00e−06
W34 < 8.76e−05 < 3.57e−06
W43a < 1.91e−04 < 5.90e−06
W43b < 1.46e−04 < 4.82e−06
W55 < 7.38e−05 < 3.14e−06
B0Iab W49 < 6.24e−05 < 2.77e−06
W60 < 8.15e−05 < 3.38e−06
W63a < 6.66e−05 < 2.90e−06
W232 < 1.28e−04 < 4.74e−06
B0Ib W2002 < 7.82e−05 < 3.28e−06
W2011 < 5.22e−05 < 2.42e−05
W3024 < 5.75e−05 < 2.60e−05
B0.5Ia W10 < 1.50e−04 < 4.83e−06
W18 < 1.27e−04 < 4.25e−06
W21 < 8.33e−06 < 3.11e−06
B0.5Iab W6a < 1.08e−04 < 3.78e−06
W54 < 4.45e−05 < 1.94e−06
62a < 8.32e−05 < 3.19e−06
B0.5Ib W62a < 8.29e−05 < 3.10e−06
B1Ia W19 < 1.04e−04 < 2.02e−06
W21 < 5.80e−05 < 1.31e−06
W43b < 6.76e−05 < 1.46e−06
W78 < 1.15e−04 < 2.18e−06
W3019 < 3.26e−04 < 4.77e−06
B1Iab W49 < 1.26e−04 < 3.26e−06
W238 < 4.91e−05 < 1.15e−06
B1.5Ia W8b < 2.76e−04 < 2.91e−06
W52 < 1.32e−04 < 1.68e−06
B2Ia W2a < 9.82e−05 < 1.50e−06
W11 < 2.14e−04 < 2.69e−06
B3Ia W70 < 1.21e−04 < 2.18e−06
B4Ia W57a < 9.39e−05 < 1.11e−06

Notes. Samples from each spectral type have been included. The upper limit flux density is taken to be 3σ where σ is the rms noise level measured in the primary-beam corrected image using a 2″ circular region centred on the optical position. The mass-loss rate calculation was performed as outlined in Sect. 4.2.2.

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