First Resolved Images of the Mira AB Symbiotic Binary at Centimeter Wavelengths

Abstract

We report the first spatially resolved radio continuum measurements of the Mira AB symbiotic binary system, based on observations obtained with the Very Large Array (VLA). This is the first time that a symbiotic binary has been resolved unambiguously at centimeter wavelengths. We describe the results of VLA monitoring of both stars over a ten month period, together with constraints on their individual spectral energy distributions, variability, and radio emission mechanisms. The emission from Mira A is consistent with originating from a radio photosphere, while the emission from Mira B appears best explained as free-free emission from an ionized circumstellar region ~(1-10)x10**13 cm in radius.

accepted to ApJ Letters

References in corpus (4)

• X-ray Outburst in Mira A
• Analysis of H2 Emission from Mira B in UV Spectra from HST
• Molecular Hydrogen Emission Lines in Far Ultraviolet Spectroscopic Explorer Observations of Mira B
• X-rays from the Mira AB Binary System

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• Discovery of an HI Counterpart to the Extended Tail of Mira
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• Wind mass transfer in S-type symbiotic binaries I. Focusing by the wind compression model
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• The Evolving Radio Photospheres of Long-Period Variable Stars
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• Formation of the Asymmetric Accretion Disk from Stellar Wind Accretion in an S-type Symbiotic Star
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• Wind mass transfer in S-type symbiotic binaries III. Confirmation of a wind focusing in EG Andromedae from the nebular [OIII]λ5007 line
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• Morphology and kinematics of the gas envelope of Mira Ceti
• Astrophysics in 2006
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• The emergence of a neutral wind region in the orbital plane of symbiotic binaries during their outbursts