The detached dust shells of AQ And, U Ant, and TT Cyg

Abstract

Detached circumstellar dust shells are detected around three carbon variables using Herschel-PACS. Two of them are already known on the basis of their thermal CO emission and two are visible as extensions in IRAS imaging data. By model fits to the new data sets, physical sizes, expansion timescales, dust temperatures, and more are deduced. A comparison with existing molecular CO material shows a high degree of correlation for TT Cyg and U Ant but a few distinct differences with other observables are also found.

Letter accepted for publication on the A&A Herschel Special Issue

References in corpus (5)

• Herschel Space Observatory - An ESA facility for far-infrared and submillimetre astronomy
• The Photodetector Array Camera and Spectrometer (PACS) on the Herschel Space Observatory
• Detached shells as tracers of AGB-ISM bow shocks
• Herschel PACS and SPIRE imaging of CW Leo
• The detached dust and gas shells around the carbon star U Ant

Cited by in corpus (29)

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• The VLTI/MIDI view on the inner mass loss of evolved stars from the Herschel MESS sample
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• Eyes in the sky: Interactions between AGB winds and the interstellar magnetic field
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• Detection of CI line emission from the detached CO shell of the AGB star R Sculptoris
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• Magnetic fields in circumstellar envelopes of evolved AGB stars
• Dramatic infrared variability of WISE J1810-3305: catching early dust ejection during the thermal pulse of an AGB star?
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• Detached Shell Carbon Stars: Tracing Thermal Pulses on the Asymptotic Giant Branch
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