# 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}
}
• Published 8 August 2015
• Physics
• The Astrophysical Journal Supplement Series
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…

### Modeling the Variable Polarization of ϵ Aurigae In and Out of Eclipse

• Physics
The Astronomical Journal
• 2021
The eclipsing binary ϵ Aur is unique in being a very-long-period binary involving an evolved, variable F star and a suspected B main-sequence star enshrouded in an opaque circumstellar disk. The

### VVV-WIT-08: the giant star that blinked

• Physics
Monthly Notices of the Royal Astronomical Society
• 2021
We report the serendipitous discovery of a late-type giant star that exhibited a smooth, eclipse-like drop in flux to a depth of 97 per cent. Minimum flux occurred in 2012 April and the total event

### Interferometry in the era of time-domain astronomy

• Physics, Geology
• 2018
The physical nature of time variable objects is often inferred from photometric light-curves and spectroscopic variations. Long-baseline optical interferometry has the power to resolve the spatial

### The 2020 Eclipse of R Aquarii in the Near-infrared: Mid-eclipse Observations of Disk Distress

• Physics, Geology
The Astrophysical Journal
• 2022
The Mira in the bright, dusty, symbiotic binary R Aquarii undergoes eclipses of multiyear duration every ∼44 yr by a large, opaque accretion disk. The 2020 eclipse was confirmed by I-band photometry.

### On the eclipsing binary ELHC 10 with occulting dark disc in the Large Magellanic Cloud

• Physics
• 2016
We investigate the luminous star ELHC 10 located in the bar of the Large Magellanic Cloud, concluding that it is a SB1 long-period eclipsing binary where the main eclipse is produced by an opaque

### Occultations from an Active Accretion Disk in a 72-day Detached Post-Algol System Detected by K2

• Physics
• 2018
Disks in binary systems can cause exotic eclipsing events. MWC 882 (BD –22 4376, EPIC 225300403) is such a disk-eclipsing system identified from observations during Campaign 11 of the K2 mission. We

### AN EXTREME ANALOGUE OF ϵ AURIGAE: AN M-GIANT ECLIPSED EVERY 69 YEARS BY A LARGE OPAQUE DISK SURROUNDING A SMALL HOT SOURCE

• Physics, Geology
• 2016
We present TYC 2505-672-1 as a newly discovered and remarkable eclipsing system comprising an M-type red giant that undergoes a ∼3.45 year long, near-total eclipse (depth of ∼4.5 mag) with a very

### Dynamical Surface Imaging of λ Andromedae

• Physics
The Astrophysical Journal
• 2021
We present temperature maps of RS CVn star λ Andromedae, reconstructed from interferometric data acquired in 2010 and 2011 by the Michigan Infra-Red Combiner instrument at the Center for High Angular

### The transiting dust clumps in the evolved disc of the Sun-like UXor RZ Psc

• Physics, Geology
Royal Society Open Science
• 2017
It is suggested that the rarity of Sun-like stars showing disc-related variability may arise because (i) any accretion streams are transparent and/or (ii) turbulence above the inner rim is normally shadowed by a flared outer disc.

### MESA models of the evolutionary state of the interacting binary epsilon Aurigae

• Physics
• 2018
Using MESA code (Modules for Experiments in Stellar Astrophysics, version 9575), an evaluation was made of the evolutionary state of the epsilon Aurigae binary system (HD 31964, F0Iap + disk). We

## References

SHOWING 1-10 OF 87 REFERENCES

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

• Physics
• 2008
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

• Physics
• 2012
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

• Physics, Geology
• 2010
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

• Physics
• 2012
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

• Physics, Geology
• 2010
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

• Physics, Geology
• 2013
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

• Physics, Geology
• 2009
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

• Physics, Geology
• 2012
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.

• Physics
• 1986
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