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Table 3.

Mass-loss rates of AT 2000ch at different episodes derived from optical and radio continuum observations.

Date LHα Sν ν vw t r15 β (3) (5) (7)
(dd.mm.yyyy) [erg s−1 cm−2] [mJy] [GHz] [km s−1] [days] [cm] [M yr−1] [M yr−1] [M yr−1]
01.06.2000* 2 × 10−14 1800 25 0.58 8073 2.8 × 10−5 < 7.7 × 10−5
16.10.2008* 4 × 10−14 2300 9 0.33 4593 5.1 × 10−5 < 1.1 × 10−4
12.01.2016 2.7 × 10−15 2000 50 1.13 15729 1.1 × 10−5 < 2.8 × 10−5
17.12.2011 53 6 2500 160 < 4.3 × 10−4
13.02.2012 50 6 2000 15 3.1 × 10−6
25.03.2012 163 1.5 2000 55 2.0 × 10−6
24.06.2012 111 1.5 2500 145 < 1.9 × 10−5
01.12.2014 < 83 1.5 2000 40 > 1.2 × 10−6
01.12.2014 < 5.5 5.5 2000 40 > 3.5 × 10−5

Notes. Columns from left to right: observation date, where the asterisk marks the central date of a consecutive measure, Hα luminosity LHα, radio flux Sν, frequency ν, wind velocity vw, elapsed time from latest outburst t, radius of the recently ejected material in 1015 cm, β, and the mass-loss rates derived via Eqs. (3), (5), and (7) denoted in the index.

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