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The ejecta of η Carinae

Published online by Cambridge University Press:  01 August 2006

Theodore R. Gull
Theodore R. Gull*
Affiliation:
Exploration of the Universe Division, Laboratory for Extrasolar Planets and Stellar Astrophysics, Code 667, Goddard Space Flight Center, Greenbelt, MD 20771, USA email: theodore.r.gull@nasa.gov
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Abstract

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High-dispersion spectroscopic observations of the neutral Homunculus and the ionized Little Homunculus, ejecta of η Car, are being analyzed to determine the relative abundances of metals. Thousands of lines of neutral and singly-ionized metals and molecules seen in the Homunculus suggest that this oxygen-, carbon-poor, nitrogen-, helium-rich gas contains very different dust grains likely devoid of metal oxides. The gas to dust ratio is likely much larger than the canonical 100:1 implying that the 12 M⊙ estimate of the ejecta is a lower limit.

Keywords

stars: individual (η Car)windsmass lossabundancesbinaries
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Highlights of Astronomy 14: Highlights of Astronomy , August 2006 , pp. 204
Copyright
Copyright © International Astronomical Union 2007

References

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