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η Carinae long-term variability

Published online by Cambridge University Press:  12 July 2011

Augusto Damineli ,
Mairan Teodoro ,
Michael F. Corcoran  and
Jose H. Groh
Augusto Damineli
Affiliation:
Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Rua do Matão 1226, São Paulo, 05508-900, Brazil email: damineli@astro.iag.usp.br
Mairan Teodoro
Affiliation:
Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Rua do Matão 1226, São Paulo, 05508-900, Brazil email: damineli@astro.iag.usp.br
Michael F. Corcoran
Affiliation:
NASA/GSFC, Code 662, X-ray Astrophysics, Greenbelt, MD 20771, USA
Jose H. Groh
Affiliation:
Max-Planck-Institute für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
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Abstract

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We present preliminary results of our analysis on the long-term variations observed in the optical spectrum of the LBV star η Carinae. Based on the hydrogen line profiles, we conclude that the physical parameters of the primary star did not change in the last 15 years.

Keywords

stars: individual (η Carinae)stars: variables: otherstars: emission-line

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