In the Shadow of the Transiting Disk: Imaging epsilon Aurigae in Eclipse

Details In the Shadow of the Transiting Disk: Imaging epsilon Aurigae in Eclipse In the Shadow of the Transiting Disk: Imaging epsilon Aurigae in Eclipse

2010-04-14

arxiv.org/abs/1004.2464v1

Nature 464, 870-872(8 April 2010)

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

As submitted to Nature. Published in Nature April 8, 2010.

Scientific paper

10.1038/nature08968

Eclipses of the single-line spectroscopic binary star, epsilon Aurigae, provide an opportunity to study the poorly-defined companion. We used the MIRC beam combiner on the CHARA array to create interferometric images during eclipse ingress. Our results demonstrate that the eclipsing body is a dark disk that is opaque and tilted, and therefore exclude alternative models for the system. These data constrain the geometry and masses of the components, providing evidence that the F-star is not a massive supergiant star.

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