Mm/submm observations of symbiotic binary stars: implications for the mass loss and mass exchange

Abstract

We discuss mm/submm spectra of a sample of symbiotic binary systems, and compare them with popular models proposed to account for their radio emission. We find that radio emission from quiescent S-type systems originates from a conical region of the red giant wind ionized by the hot companion (the STB model), whereas more complicated models involving winds from both components and their interaction are required to account for radio emission of active systems. We also find that the giant mass-loss rates derived from our observations are systematically higher than those for single cool giants. This result is in agreement with conclusions derived from IRAS observations and with requirements of models for the hot component.

7 pages, 8 figures. Paper presented at COSPAR 2000 "New results in FIR and Submm Astronomy", to be published in Advances in Space Research

References in corpus (2)

• A catalogue of symbiotic stars
• On the radio spectrum of CI Cygni: a test of popular models for symbiotic stars

Cited by in corpus (13)

• Disentangling the composite continuum of symbiotic binaries I. S-type systems
• Broad H-alpha wings from the optically thin stellar wind of the hot components in symbiotic binaries
• Wind mass transfer in S-type symbiotic binaries II. Indication of wind focusing
• Wind mass transfer in S-type symbiotic binaries I. Focusing by the wind compression model
• Chemical abundance analysis of symbiotic giants - III. Metallicity and CNO abundance patterns in 24 southern systems
• Electron optical depths and temperatures of symbiotic nebulae from Thomson scattering
• Silicates in D-type symbiotic stars: an ISO overview
• Ionization structure of hot components in symbiotic binaries during active phases
• CO observations of symbiotic stellar systems
• EG Andromedae: A New Orbit and Additional Evidence for a Photoionized Wind
• Synthetic Spectral Analysis of the Hot Component in the S-Type Symbiotic Variable EG Andromeda
• HII regions in symbiotic binaries and their radio emission
• Wind-mass transfer in S-type symbiotic binaries IV. Indication of high wind-mass-transfer efficiency from active phases