SIMBAD references

2016A&A...588L...1H - Astronomy and Astrophysics, volume 588, L1-1 (2016/4-1)

Imaging the dust sublimation front of a circumbinary disk.

HILLEN M., KLUSKA J., LE BOUQUIN J.-B., VAN WINCKEL H., BERGER J.-P., KAMATH D. and BUJARRABAL V.

Abstract (from CDS):

Aims. We present the first near-IR milli-arcsecond-scale image of a post-AGB binary that is surrounded by hot circumbinary dust.
Methods. A very rich interferometric data set in six spectral channels was acquired of IRAS 08544-4431 with the new RAPID camera on the PIONIER beam combiner at the Very Large Telescope Interferometer (VLTI). A broadband image in the H-band was reconstructed by combining the data of all spectral channels using the SPARCO method.
Results. We spatially separate all the building blocks of the IRAS 08544-4431 system in our milliarcsecond-resolution image. Our dissection reveals a dust sublimation front that is strikingly similar to that expected in early-stage protoplanetary disks, as well as an unexpected flux signal of ∼4% from the secondary star. The energy output from this companion indicates the presence of a compact circum-companion accretion disk, which is likely the origin of the fast outflow detected in Hα.
Conclusions. Our image provides the most detailed view into the heart of a dusty circumstellar disk to date. Our results demonstrate that binary evolution processes and circumstellar disk evolution can be studied in detail in space and over time.

Abstract Copyright: © ESO, 2016

Journal keyword(s): stars: AGB and post-AGB - binaries: spectroscopic - techniques: high angular resolution - infrared: stars - techniques: interferometric - circumstellar matter

Simbad objects: 6

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2021.07.27-22:50:22

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