# High-Resolution Imaging of Dust Shells by Using Keck Aperture Masking and the IOTA Interferometer

@article{Monnier2004HighResolutionIO,
title={High-Resolution Imaging of Dust Shells by Using Keck Aperture Masking and the IOTA Interferometer},
author={John D. Monnier and Rafael Millan-Gabet and Peter G. Tuthill and Wesley A. Traub and Nathaniel P. Carleton and Vincent Coud{\'e} du Foresto and William C. Danchi and Marc G. Lacasse and S'ebastien Morel and Guy Perrin and Irene L. Porro and F. P. Schloerb and Charles H. Townes},
journal={The Astrophysical Journal},
year={2004},
volume={605},
pages={436 - 461}
}
• Published 19 January 2004
• Physics
• The Astrophysical Journal
We present first results of an experiment to combine data from Keck aperture masking and the Infrared-Optical Telescope Array to image the circumstellar environments of evolved stars with ~20 mas resolution. The unique combination of excellent Fourier coverage at short baselines and high-quality long-baseline fringe data allows us to determine the location and clumpiness of the innermost hot dust in the envelopes and to measure the diameters of the underlying stars themselves. We find evidence…
106 Citations
• Physics
• 2007
We report the results of a high angular resolution near-infrared survey of dusty Wolf-Rayet stars using the Keck I Telescope, including new multiwavelength images of the pinwheel nebulae WR 98a, WR
• Physics
• 2012
While the importance of dusty asymptotic giant branch (AGB) stars to galactic chemical enrichment is widely recognized, a sophisticated understanding of the dust formation and wind-driving mechanisms
• Physics
• 2009
We present subarcsecond angular resolution, high-Strehl ratio mid-IR adaptive optics images of the powerful OH/IR source and cool hypergiant NML Cyg at 8.8, 9.8, and 11.7 μm. These images reveal once
• Physics
• 2009
We present results from a spectro-interferometric study of the Miras o Cet, R Leo, and W Hya obtained with the Keck Aperture Masking Experiment from 1998 September to 2002 July. The spectrally
• Physics
• 2008
The angular diameters of six oxygen-rich Mira-type long-period variables have been measured at various NIR wavelengths using the aperture-masking technique in an extensive observing program from 1997
• Physics, Environmental Science
• 2011
Context. The nature of maser emission means that the apparent angular size of an individual maser spot is determined by the local amplification process as well as by the instrinsic size of the
For the best-studied nearby Galactic asymptotic giant branch (AGB) stars a wealth of observational data is typically available in the form of photometry, often extending into the sub-mm, spectra
We present a 0.5"-resolution diffraction-limited 17.7 micron image of the red supergiant Antares obtained with the VLT mid-infrared instrument VISIR. The VISIR image shows six clumpy dust clouds
• Physics, Geology
• 2011
The evolved carbon-rich asymptotic giant branch star IRC +10216 (CW Leo) is the brightest mid-infrared source outside the solar system, as well as one of the closest examples of an evolved star
We provide high-resolution maps of the circumstellar dust shells of several dozen Asymptotic Giant Branch (AGB) stars using data from the Spitzer space telescope Multiband Imaging Photometer (MIPS)

## References

SHOWING 1-10 OF 85 REFERENCES

• Physics
• 2000
We present multiepoch, diffraction-limited images of the nebula around the carbon star CIT 6 at 2.2 and 3.1 μm from aperture masking on the Keck I Telescope. The near-IR nebula is resolved into two
• Physics, Geology
• 1996
Infrared imaging properties of dusty winds around late-type stars are investigated in detail, employing a self-consistent model that couples the equations of motion and radiative transfer. Because of
• Physics
• 2002
Long-baseline optical interferometers can now detect and resolve hot dust emission thought to arise at the inner edge of circumstellar disks around young stellar objects (YSOs). We argue that the
• Physics
• 2001
NML Cyg is a highly evolved OH/IR supergiant, one of the most prominent infrared objects due to its strong obscuration by dust, and supposed to be among the most luminous supergiants in the galaxy.
• Physics
• 2000
The University of California Berkeley Infrared Spatial Interferometer has measured the mid-infrared visibilities of the carbon star IRC +10216 and the red supergiant VY CMa. The dust shells around
• Physics
• 1997
Visibility observations at 11 μm of o Ceti have been made with the University of California (Berkeley) Infrared Spatial Interferometer during the time period 1988-1995. The observed visibilities
• Physics, Environmental Science
• 1997
Measurements by the University of California Berkeley Infrared Spatial Interferometer at 11.15 μm have yielded strong evidence for multiple dust shells and/or significant asymmetric dust emission
• Physics
• 2000
We have conducted the first systematic study of Herbig Ae/Be stars using the technique of long baseline stellar interferometry in the near-infrared, with the objective of characterizing the
• Physics, Geology
• 2001
We report new observations of the peculiar star HD 62623 obtained with aperture masking interferometry performed on the Keck I telescope at λ = 1.24, 1.65, 2.26 and 3.08 $\rm \mu m$. The envelope
• Physics
• 2002
The eccentric W-R + O binary system WR 140 produces dust for a few months at intervals of 7.94 yr coincident with periastron passage. We present the first resolved images of this dust shell, at