Other
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984iue..prop.1792c&link_type=abstract
IUE Proposal ID #VVGRC
Other
Scientific paper
The Epsilon Aurigae system consists of a late-A or early-F type supergiant with a secondary that may be an early type star. The supergiant is losing mass at a very high rate, leading to a complicated circumstellar envelope around the system. The portion of the envelope around the secondary, passing in front of the supergiant, leads to the observed eclipse. Models of the system suggest that material flowing from the supergiant may form an accretion disk around the companion We propose a series of observations of Epsilon Aurigae during the ongoing eclipse that will enable us to greatly improve our knowledge of the system. Specifically, long- and short-wavelength, high-dispersion spectra obtained through primary eclipse are needed: to search for lines diagnostic of a putative accretion disk; to study lines characteristic of the wind of the primary star and other circumstellar mass flow; and to investigate the nature of the secondary companion. Observations made just after first contact in episode 5 compared-to pre-eclipse observations show a wavelength dependent eclipse which we interpret as due to-dust but which some others interpret as due to our choice of the baseline outside-of-eclipse spectrum. Episode 7 observations just before fourth contact will differentiate between the two interpretations.
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