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- W2114276584 abstract "We present an analysis of the long-term light variation in the interval 1935-1992 and of the light and colour variation in VBLUW, uvby and JHKLM photometry in the interval 1971-1992 of η Carinae. The very long-term or secular variation in visual light, showing a smoothed gradual rise of ∼ 1 m 5 in the interval 1935-1952 and ∼ 1 m in the interval 1952-1992, can be largely attributed to a decrease of the circumstellar extinction. Evolutionary causes are considered, but seem of negligible importance. An analysis of the light and colour variations in the interval 1974-1992, revealed the occurrence of at least seven S Dor-type phenomena similar to LBVs on a time scale of 1-3 yr and amplitudes of 0 m 1-0 m 2. Thus the main object is almost certain an LBV" @default.
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- W2114276584 title "The optical and near infrared variability of eta Carinae: A binary luminous blue variable?" @default.
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