# Mass and Kinetic Energy of the Homunculus Nebula around η Carinae

@article{Smith2003MassAK,
title={Mass and Kinetic Energy of the Homunculus Nebula around $\eta$ Carinae},
author={Nathan Smith and Robert D. Gehrz and Philip M. Hinz and William F. Hoffmann and Joseph L. Hora and Eric E. Mamajek and Michael R. Meyer},
journal={The Astronomical Journal},
year={2003},
volume={125},
pages={1458 - 1466}
}
• Published 1 March 2003
• Physics
• The Astronomical Journal
We examine thermal infrared images of η Car at wavelengths from 4.8 to 25 μm obtained with the MIRAC3 camera system at the Magellan Observatory, and we conclude that η Car's circumstellar Homunculus Nebula contains much more mass (≳12 M⊙) and kinetic energy (1049.6–1050 ergs) than had previously been recognized. Excess far-infrared emission from a large mass of cold dust had been discovered recently by Morris et al., which they attributed to 110 K dust in a compact equatorial torus. Our images…
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The enigmatic object η Carinae is believed to represent an important, but short-lived, unstable phase in the life of the most massive stars, occurring shortly before they explode as supernovae or
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