Nebulae from Eruptions of Luminous Evolved Stars: Eta Carinae, RY Scuti, and the LBVs

Details Nebulae from Eruptions of Luminous Evolved Stars: Eta Carinae, RY Scuti, and the LBVs Nebulae from Eruptions of Luminous Evolved Stars: Eta Carinae, RY Scuti, and the LBVs

Mar 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..361..200s&link_type=abstract

Active OB-Stars: Laboratories for Stellar and Circumstellar Physics, ASP Conference Series, Vol. 361, Proceedings of the confere

Physics

1

Scientific paper

The most prodigious mass loss for luminous hot stars occurs during the Luminous Blue Variable (LBV) phase in transition to a Wolf-Rayet star. Most of the mass loss is a result of a few brief eruptions, rather than a steady wind. For the most luminous stars, these eruptions eject several M_{&sun;} at once, accounting for a large fraction of their total post-main-sequence mass loss. The geometry of their nebulae in the young free expansion phase traces the roles of rotation and binary interactions. Our most observable example is the nebula around ηCar, while nebulae around the eclipsing binary RYSct and other LBVs share similar but less extreme properties. Both ηCar and RYSct have nebulae less than 200 yrs old with pronounced axial symmetry.

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