Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-25T16:19:30.707Z Has data issue: false hasContentIssue false
  • English
  • Français

VLBI Observations of WR Stars

Published online by Cambridge University Press:  03 August 2017

M. Felli  and
M. Massi
M. Felli
Affiliation:
Osservatorio Astrofisico di Arcetri, Florence, Italy
M. Massi
Affiliation:
Osservatorio Astrofisico di Arcetri, Florence, Italy

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We present the first VLBI radio observations of two WR stars (WR140 and WR146) and of two early type stars (HD167971 and θ1 ORI A). The derived size and brightness temperature suggest that in all cases the radio emission originates from two distinct components: a steady weak emission due to the ionized wind of the primary and a smaller diameter brighter non-thermal component, probably associated to a small region within the ionized envelope of the star.

Type
Session II. Atmospheres
Information
Symposium - International Astronomical Union , Volume 143: Wolf–Rayet Stars and Interrelations with other Massive Stars in Galaxies , 1991 , pp. 87 - 94
Copyright
Copyright © Kluwer 1991 

References

Abbott, D.C., Bieging, J.H., Churchwell, E., 1986, Ap.J., 303, 236.Google Scholar
Becker, R.H., White, R.L., 1985, Ap.J., 297, 649.CrossRefGoogle Scholar
Bieging, J.H., Abbott, D.C., Churchwell, E., 1989, Ap.J., 340, 518.CrossRefGoogle Scholar
Churchwell, E., Felli, M., Wood, D.O.S., Massi, M., Ap. J., 321, 516.Google Scholar
Felli, M., Stanga, R., Oliva, E., Panagia, N. 1985, Astron. Astrophys 151, 27.Google Scholar
Felli, M., Massi, M., Churchwell, E., 1989, Astron. Astrophys., 217, 179.Google Scholar
Garay, G., Moran, J.M., Reid, M.J., 1985, in Radio Stars, Hjellming, R. M. and Gibson, D. M. eds, 131.Google Scholar
Moran, J.P., Davis, R.J., Bode, M.F., Taylor, A.R., Spencer, R.E., Argue, A.N., Irwin, M.J., Shanklin, J.D., 1989, Nature, 340, 449.Google Scholar
Panagia, N., Felli, M., 1975, Astron. Astrophys., 39, 1.Google Scholar
Williams, P.M., van der Hucht, K.A., Pollock, A.M.T., Florkowski, D.R., van der Woerd, H., Wamsteker, W.M., Mon. Not. R. Astr. Soc., 1990, 243, 662.Google Scholar