Epsilon Aurigae -- Is the Answer Blowin' in the Wind?

Details Epsilon Aurigae -- Is the Answer Blowin' in the Wind? Epsilon Aurigae -- Is the Answer Blowin' in the Wind?

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aspc..348..156a&link_type=abstract

Astrophysics in the Far Ultraviolet: Five Years of Discovery with FUSE ASP Conference Series, Vol. 348, Proceedings of the Confe

Astronomy and Astrophysics

Astrophysics

3

Scientific paper

We report on a FUSE observation of the enigmatic eclipsing binary, ɛ Aurigae. This system undergoes a two year long eclipse every 27.1 years, presumably as a large, nearly edge-on disk passes in front of the F0 Ia primary star. We obtained FUSE data shortly after the predicted emergence of the secondary object from behind the primary star. The spectrum is heavily obscured by H2 and interstellar absorption, consistent with the system reddening. Nonetheless ɛ Aur shows a rich emission line spectrum due to low lying lines, such as Fe II, down to 1040 Å. We discuss a model where the emission is due to resonance scattering of photons in the expanding wind of the supergiant or disk from an occulted hot source.

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