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Radio observations and the mass flow rate of α Cyg (A2Ia)

Published online by Cambridge University Press:  12 April 2016

B. Wolf ,
O. Stahl  and
W.J. Altenhoff
B. Wolf*
Affiliation:
Remeis-Sternwarte Bamberg, Astronomisches Institut der Universität Erlangen-Nürnberg
O. Stahl
Affiliation:
Remeis-Sternwarte Bamberg, Astronomisches Institut der Universität Erlangen-Nürnberg
W.J. Altenhoff
Affiliation:
Max-Planck-Institut für Radioastronomie
*
1Permanent address : Landessternwarte Königstuhl , Heidelberg.

Extract

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From the free-free excess at 10μ. Barlow and Cohen (1977) (hereafter referred to as BC) derived a mass loss rate of 6.9 10-7 M⊙ yr-1 for α Cyg. They predicted a 10 GHz radio flux of 2.2 mJy. On the other hand Praderie et al. (1980) derived a considerable lower mass loss rate of 1.1 10 -8 ≤Ṁ ≤ 7 10-8 M ⊙ yr-1 from a curve of growth analysis of the envelope ultraviolet Fell-lines of α Cyg. Radio observations are desirable to make a decision about these discrepant results. Therefore we observed α Cyg at 15 GHz with the 100 m telescope of the MPIfR at Effelsberg. The observations are discussed together with recent VLA data of Abbott et al. (1980).

Type
Session I - Winds from Early Type Stars: Observations
Information
International Astronomical Union Colloquium , Volume 59: Effects of Mass Loss on Stellar Evolution , 1981 , pp. 61 - 64
Copyright
Copyright © Reidel 1981

References

Abbott, D.C., Bieging, J.H., Churchwell, E., Cassinelli, J.P.: 1980, Astrophys. J. 238, 196 CrossRefGoogle Scholar
Barlow, M.J., Cohen, M.: 1977, Astrophys.J. 213, 737 CrossRefGoogle Scholar
Groth, H.G.: 1961, Zs.f.Ap. 51, 231 Google Scholar
Lamers, H.J.G.L.M., Stalio, R., Kondo, Y.: 1978, Astrophys. J. 223, 207 Google Scholar
Panagia, N., Felli, M.: 1975, Astron.Astrophys. 39, 1 Google Scholar
Praderie, F., Talavera, A., Lamers, H.J.G.L.M.: 1980, Astron.Astrophys. 86, 271 Google Scholar
Spitzer, L.: 1962, Physics of Fully Ionized Gases, 2nd Edition, Interscience Publ., New York Google Scholar
Wright, A.E., Barlow, M.J.: 1975,Mon.Not.R.astr.Soc.170, 41 Google Scholar