The role of luminous blue variables in the evolution of massive stars

Astronomy and Astrophysics – Astronomy

Scientific paper

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Blue Stars, Magellanic Clouds, Stellar Evolution, Stellar Luminosity, Stellar Mass, Variable Stars, Astronomical Photography, Hertzsprung-Russell Diagram, Light Curve, Line Spectra

Scientific paper

The physical characteristics and evolution of luminous blue variables (LBVs) are examined. The luminosity of LBVs and their abundance in the LMC are addressed, and the properties of their circumstellar envelopes are discussed. The mechanisms involved in stellar outbursts of LBVs are reviewed. It is shown that LBVs start as stars with masses greater than 30 solar masses and that they lose significant mass during the LBV phase. A Wolf-Rayet star is probably the immediate precursor of an LBV star.

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