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Space Science Reviews

, Volume 66, Issue 1–4, pp 225–230 | Cite as

The gradual acceleration of the outflow of VX-Sagittarii: A stellar evolutionary effect?

  • Nathan Netzer
Massive Star Atmospheres and Stellar Winds
  • 34 Downloads

Abstract

VX-Sagittarii is a red supergiant with a superwind which is observed in several maser lines. They provide an evidence that the outflow velocity keeps growing considerably at large distance from the star. It is argued that this phenomenon can be explained by stellar evolutionary effects.

As a rule, the outflow velocity for late type stars correlates with the mass loss rate and from that it is suggested that the mass loss rate was higher in the past and is decreasing now. The mass of VX Sagittarii can be estimated on this basis and is about 40–50M

Keywords

Mass Loss Loss Rate Large Distance Late Type Evolutionary Effect 
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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References

  1. Bowers, P. F. and Johnston, K. J.: 1990,Ap. J. 354, 676Google Scholar
  2. Chapman, J. M. and Cohen, R. J.: 1986,M.N.R.A.S. 220, 513Google Scholar
  3. Goldreich, P. and Scoville, N.: 1976,Ap. J. 205, 144Google Scholar
  4. Knapp, G. R., Sutin, B. M., Phillips, T. G., Ellison, B. N., Keene, J. B., Leighton, R. B., Masson, C. R., Steiger, W., Veidt, B. and Young, K.: 1989,Ap. J. 336, 822Google Scholar
  5. Humphreys, R. W., Strecker, D. W. and Ney, E. P.: 1972,Ap. J. 172, 75Google Scholar
  6. Netzer, N.: 1989,Ap. J. 342, 1068Google Scholar
  7. Netzer, N. and Elitzur, M.: 1993,Ap. J. 410, 701Google Scholar

Copyright information

© Kluwer Academic Publishers 1994

Authors and Affiliations

  • Nathan Netzer
    • 1
  1. 1.ORT-Braude CollegeISRAEL

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