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Airborne spectrophotometry of Eta Carinae from 4.5 to 7.5 microns and a model for source morphologySpectrophotometric observations of Eta Car between 4.5 and 7.5 microns show a featureless thermal-like spectrum with no fine-structure lines or broad emission or absorption features. The color temperature of the spectrum is approximately 375 K. High spatial resolution maps at 3.5, 4.8, and 10 microns obtained from the ground are used to discuss the dust distribution and temperature structure, and to present a model for general source morphology. The upper limit to the brightness of the forbidden Ar II fine-structure emission line at 6.98 microns is less than 7 x 10 to the -16th W/sq cm, which still allows for a significant overabundance of argon and is consistent with the evolved nature of the source.
Document ID
Document Type
Reprint (Version printed in journal)
External Source(s)
Russell, Ray W. (Aerospace Corp. Los Angeles, CA, United States)
Lynch, David K. (Aerospace Corp. Los Angeles, CA, United States)
Hackwell, John A. (Aerospace Corp. Los Angeles, CA, United States)
Rudy, Richard J. (Aerospace Corp. Los Angeles, CA, United States)
Rossano, George S. (Aerospace Corp. Space Sciences Laboratory, Los Angeles, CA, United States)
Castelaz, M. W. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 13, 2013
Publication Date
October 15, 1987
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 321
ISSN: 0004-637X
Subject Category
Funding Number(s)
Distribution Limits