INTERFEROMETRY OF ϵ AURIGAE: CHARACTERIZATION OF THE ASYMMETRIC ECLIPSING DISK

@article{Kloppenborg2015INTERFEROMETRYO,
  title={INTERFEROMETRY OF ϵ AURIGAE: CHARACTERIZATION OF THE ASYMMETRIC ECLIPSING DISK},
  author={Brian Kloppenborg and Robert E. Stencel and John D. Monnier and Gail H. Schaefer and Fabien R. Baron and C. Tycner and Robert T. Zavala and Donald J. Hutter and M. Zhao and Xiao Che and Theo A. ten Brummelaar and Christopher D. Farrington and R. J. Parks and Harold A. Mcalister and Judit Sturmann and Laszlo Sturmann and P. J. Sallave-Goldfinger and Nils Turner and Ettore Pedretti and Nathalie D. Thureau},
  journal={The Astrophysical Journal Supplement Series},
  year={2015},
  volume={220}
}
We report on a total of 106 nights of optical interferometric observations of the ϵ Aurigae system taken during the last 14 years by four beam combiners at three different interferometric facilities. This long sequence of data provides an ideal assessment of the system prior to, during, and after the recent 2009–2011 eclipse. We have reconstructed model-independent images from the 10 in-eclipse epochs which show that a disk-like object is indeed responsible for the eclipse. Using new three… 

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References

SHOWING 1-10 OF 87 REFERENCES

Interferometric Studies of the Extreme Binary ϵ Aurigae: Pre-Eclipse Observations

We report new and archival K-band interferometric uniform disk diameters obtained with the Palomar Testbed Interferometer for the eclipsing binary star ϵ Aurigae, in advance of the start of its

A high angular and spectral resolution view into the hidden companion of ε Aurigae

The enigmatic binary, e Aur, is yielding its parameters as a result of new methods applied to the recent eclipse, including optical spectro-interferometry with the VEGA beam combiner at the CHARA

TAMING THE INVISIBLE MONSTER: SYSTEM PARAMETER CONSTRAINTS FOR ϵ AURIGAE FROM THE FAR-ULTRAVIOLET TO THE MID-INFRARED

We have assembled new Spitzer Space Telescope IRAC observations of the mysterious binary star ϵ Aurigae, along with archival far-ultraviolet to mid-infrared data, to form an unprecedented spectral

Large distance of ε Aurigae inferred from interstellar absorption and reddening

The long-period (P = 27.1 years) peculiar eclipsing binary e Aur, which has recently completed its two year-long primary eclipse, has perplexed astronomers for over a century. The eclipse arises from

EPSILON AURIGAE: AN IMPROVED SPECTROSCOPIC ORBITAL SOLUTION

A rare eclipse of the mysterious object ϵ Aurigae will occur in 2009–2011. We report an updated single-lined spectroscopic solution for the orbit of the primary star based on 20 years of monitoring

Merging Recent and Historic Spectra of ϵ Aurigae: Properties of the System’s Components, and Discovery of a Mass Transfer Stream

This study of new CCD spectra of ϵ Aur recorded in the blue and near-UV during the 2010 eclipse has been reinforced and extended by the inclusion of some 130 digitized historic spectra from Mount

PROTOPLANETARY DISK STRUCTURES IN OPHIUCHUS

We present the results of a high angular resolution (0.″3 ≈ 40 AU) Submillimeter Array survey of the 345 GHz (870 μm) thermal continuum emission from nine of the brightest, and therefore most

2D Monte-Carlo Radiative transfer modeling of the disk shaped secondary of Epsilon Aurigae

We present two dimensional Monte-Carlo radiative transfer models for the disk of the eclipsing binary $\epsilon$ Aur by fitting its spectral energy distribution from optical to the far-IR

Effects of dust on light-curves of ε Aurigae-type stars

Context. � Auriga is one of the most mysterious objects in the sky. Previous modeling of its light-curve assumed a dark, inclined, non-transparent or semi-transparent dusty disk with a central hole.

EPSILON AURIGAE IN ECLIPSE. II. OPTICAL ABSORPTION LINES FROM THE SECONDARY.

Optical high-resolution 2.7-m McDonald Observatory observations of Epsilon Aur obtained during the 1982-1985 eclipse are discussed, with focus on the K I resonance lines, some Fe II and Ti II lines
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