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Mass loss from Luminous Blue Variables

Published online by Cambridge University Press:  12 April 2016

Henny J. G. L. M. Lamers
Henny J. G. L. M. Lamers*
Affiliation:
Joint Institute for Laboratory AstrophysicsUniversity of Colorado and National Institute of Standards and TechnologyBoulder, Colorado, 80309-0440USA

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Luminous Blue Variables (LBV’s) are losing mass at a rate which is higher than in normal stars of the same luminosity. This high mass loss is evident from the occurrence of P Cygni profiles in the visual spectrum, the large numbers of UV lines which are Doppler shifted or show P Cygni profiles and the large IR excess or radio free-free emission. Mass loss from LBV’s is strongly variable on a wide range of timescales from months to centuries and possibly even millenia. During these variations the mass loss may vary from values as low as 10-6 to 10-5 M⊙/yr, when the star is quiet, to outbursts of the type observed in P Cygni in AD 1600 and n Car in 1837 (for reviews see Davidson, 1987; Lamers, 1986, 1987).

Type
Section I: Main Papers, General Discussions, and Two Panel Discussions
Information
International Astronomical Union Colloquium , Volume 113: Physics of Luminous Blue Variables , 1989 , pp. 135 - 148
Copyright
Copyright © Kluwer 1989

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