Astronomy and Astrophysics – Astronomy
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...180.2806d&link_type=abstract
American Astronomical Society, 180th AAS Meeting, #28.06; Bulletin of the American Astronomical Society, Vol. 24, p.771
Astronomy and Astrophysics
Astronomy
Scientific paper
Epsilon Aurigae is an F0 Ia supergiant in a binary system which undergoes a partial eclipse by an enigmatic secondary companion for 2 years duration every 27.1 years. It has been postulated that the secondary is a large disk of gas and dust viewed edge on. We have prepared an up-to-date report on the infrared properties of the system using 3-11 microns spectrophotometry obtained with the Kuiper Airborne Observatory and the Mt. Lemmon NASA 60" telescope during 1989-91, plus 3-20 microns broadband photometry from obtained at the IRTF during 1984-91. A simple model with two infrared sources, the primary star and a cool secondary blackbody, suffices to describe the observations. The new results are consistent with photometry from dates near the 1982-84 eclipse, but lead to a slightly higher secondary temperature of approximately 575 K. This result substantially decreases the estimated solid angle subtended by the secondary. Finally, the significance of a possible shallow absorption band near lambda = 10 microns will be discussed.
Backman Dana E.
Das Sumit R.
Lissauer Jack . J.
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