Triggers:LBVs
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Known also as S Dor stars. Exhibit slow changes in brightness with occasional outbursts of substantial mass loss. Known example: Eta Carinae.
<math>M_V \sim -11 \ldots -8</math> mag
- Baseline micro-variability: P around 10-20 days, amplitude 0.1-0.2 mag
- "normal eruptions": 1-2 mag (rise within few months), repeating with period of years or decades the brighter abs.mag the shorter period between eruptions)
- Giant eruptions ("Eta Carinae type") of around 8 mag, once a few centuries!!
- After giant eruption and fade, the star recovers its brightness as the dust disperses.
