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Radio observations of stellar mass loss

  • Sun Kwok (a1) and C. R. Purton (a1)

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A program to search for steady-state thermal emissions from stars has been in progress for several years in Canada (Purton 1976). In this program we have specifically excluded flaring objects (such as β Lyr or HR1099) where non-thermal emission is probably responsible. Out of the 30 or so detections, about 1/4 of them show a ~+1 spectral index, suggesting a 1/r2 density profile in the emitting region. This implies the existence of a non-static circumstellar envelope which is mostly likely the result of continuous mass outflow.

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References

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Gilman, R. C.: 1972. Ap. J. 178, 423.
Kwok, S.: 1975, Ap. J. 198, 583.
Kwok, S., Purton, C. R.: 1978, submitted to Ap. J.
Kwok, S., Purton, C. R., FitzGerald, P. M.: 1978, Ap. J. (Let.) 219, L125.
Purton, C. R.: 1976, in IAU Symp. 70, ed. Slettebak, A.
Smolinski, J., Feldman, P. A., Higgs, L. A.: 1977, Astron. Astrophys. 60, 277.
Wright, A. E., Allen, D. A.: 1978, M.N.R.A.S. in press.
Wright, A. E., Barlow, M. J.: 1975, M.N.R.A.S. 170, 41.

Radio observations of stellar mass loss

  • Sun Kwok (a1) and C. R. Purton (a1)

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