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Radio continuum emission from the ionized stellar winds of the cool supergiants in zeta aurigae-like systems

  • S. A. Drake
  • A. Brown
  • D. Reimers
Re-examining the Corona/Wind Dividing Line
Part of the Lecture Notes in Physics book series (LNP, volume 291)

Abstract

We have used the NRAO Very Large Array at an observing wavelength of 6 cm to survey 10 binary systems (including 3 eclipsing ζ Aur binary systems) that each contain a cool supergiant primary and a dwarf secondary of spectral type B or A. We have detected 3 of these systems (31 Cygni, 47 Cygni, and π Puppis) as radio continuum sources with inferred 6 cm luminosities in the range of 1016 - 2 x 1017 erg/sec/Hz. The detection of radio emission from these systems is strongly correlated with the secondary's spectral type: Only those systems with secondaries earlier than B4 V were detected. If the radio emission is interpreted as free-free radiation from the hot dwarf-ionized wind of the primary, the mass loss rates of these winds are ∼ 10−8Myr−1.

Keywords

Radio Emission Radio Source Mass Loss Rate Spectral Type Stellar Wind 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1987

Authors and Affiliations

  • S. A. Drake
    • 1
  • A. Brown
    • 2
  • D. Reimers
    • 3
  1. 1.ST Systems Corp.Lanham20706
  2. 2.JILAUniversity of ColoradoBoulder, CO
  3. 3.Hamburger Sternw.University of HamburgHamburg 80

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