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Blitz Model for the Eruptions of Eta Carinae

Published online by Cambridge University Press:  12 April 2016

Nathan Smith ,
Joyce A. Guzik ,
Henny J.G.L.M. Lamers ,
Joseph P. Cassinelli  and
Roberta M. Humphreys
Nathan Smith
Affiliation:
Boston U., Los Alamos, Utrecht U., U. Wisconsin and U. Minnesota
Joyce A. Guzik
Affiliation:
Boston U., Los Alamos, Utrecht U., U. Wisconsin and U. Minnesota
Henny J.G.L.M. Lamers
Affiliation:
Boston U., Los Alamos, Utrecht U., U. Wisconsin and U. Minnesota
Joseph P. Cassinelli
Affiliation:
Boston U., Los Alamos, Utrecht U., U. Wisconsin and U. Minnesota
Roberta M. Humphreys
Affiliation:
Boston U., Los Alamos, Utrecht U., U. Wisconsin and U. Minnesota

Abstract

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Following the “Great Eruption” of 1843, η Carinae underwent a second major eruption around 1890. We suggest a preliminary working model developed during this meeting (in one night, hence the term “Blitz”) that attempts to explain the temporal development of the 19th century eruptions of η Car, as well as the formation of the Homunculus nebula (note that we are not offering an explanation for the cause of the Great Eruption!). The essence of the model is that after the Great Eruption ends, the star’s extended outer envelope re-adjusts itself on a thermal time scale. This re-adjustment allows envelope material to crash back onto the surface of the star, inducing the second eruption in 1890.

Type
Section III Variable Winds
Information
International Astronomical Union Colloquium , Volume 169: Variable and Non-spherical Stellar Winds in Luminous Hot Stars , 1999 , pp. 249 - 250
Copyright
Copyright © Springer-Verlag 1999