Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-12T09:23:01.499Z Has data issue: false hasContentIssue false
  • English
  • Français

Theory of winds from hot stars

Published online by Cambridge University Press:  04 August 2017

A. G. Hearn
A. G. Hearn*
Affiliation:
Sterrewacht Sonnenborgh, Utrecht The Netherlands

Extract

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.

Mass loss from hot stars was first established by Morton (1967). He observed 3 OB supergiants, δ, ε and ζ Orionis, with an ultraviolet spectrograph sent up with a rocket. In the wavelength range of 1200 A to 2000 A he observed 6 resonance lines of highly ionized atoms such as C III, C IV, N V and Si IV. These resonance lines showed a P Cygni type line profile with an absorption component displaced to the blue corresponding to a velocity away from the stars of 1400 km s−1. Since the escape velocity from these stars is about 800 km s−1 these observations indicated the loss of mass from the stars. With rather simple assumptions he deduced a mass loss from the stars of 1 to 3 10−6 M⊙ yr−1. In spite of many more refined satellite observations and interpretations, the accepted value for mass loss from these stars has not changed by more than a factor of 2 or 3.

Type
Mass Loss from Hot Stars
Information
Symposium - International Astronomical Union , Volume 122: Circumstellar Matter , 1987 , pp. 395 - 408
Copyright
Copyright © Reidel 1987 

References

Abbott, D.C.: 1982, Astrophys. J. 259, 282 Google Scholar
Abbott, D.C.: 1984, Proceedings 3rd Trieste Workshop on “Relations between chromospheric-coronal heating and mass loss in stars” at Sacramento Peak Observatory, p. 265 Google Scholar
Abbott, D.C., Lucy, L.B.: 1985, Astrophys. J. 288, 679 Google Scholar
Barlow, M.J., Smith, L.J., Willis, A.J.: 1981, Mon. Not. R. Astr. Soc. 196, 101 Google Scholar
Cassinelli, J.P., van der Hucht, K.A.: 1986, Astron. Astrophys., in press Google Scholar
Castor, J.I., Abbott, D.C., Klein, R.I.: 1975, Astrophys. J. 195, 157 Google Scholar
Cherepashchuk, A.M., Eaton, J.A., Khaliullin, Kh. F.: 1984, Astrophys. J. 281, 774 Google Scholar
Conti, P.S.: 1982, Proceedings I.A.U. Symposium no. 99 “Wolf Rayet stars: observations, physics, evolution” ed. de Loore, C.W.H. and Willis, A.J., p. 3 Google Scholar
Friend, D.B., Abbott, D.C.: 1986, Astrophys. J. in press Google Scholar
Garmany, C.D., Conti, P.S.: 1984, Astrophys. J. 284, 705 Google Scholar
Garmany, C.D., Conti, P.S.: 1985, Astrophys. J. 293, 407 CrossRefGoogle Scholar
Hearn, A.G.: 1975, Astron Astrophys. 40, 227 Google Scholar
Kudritzki, R.P., Pauldrach, A., Puls, J.: 1986, Astron. Astrophys., in press Google Scholar
Lucy, L.B., Solomon, P.M.: 1970, Astrophys. J. 159, 879 Google Scholar
Marlborough, J.M., Roy, J.-R.: 1970, Astrophys. J. 160, 221 Google Scholar
Morton, D.C.: 1967, Astrophys. J. 150, 535 CrossRefGoogle Scholar
Panagia, N., Macchetto, F.: 1982, Astron. Astrophys. 106, 266 Google Scholar
Pauldrach, A., Puls, J., Hummer, D.G., Kudritzki, R.P.: 1985, Astron. Astrophys. 148, L1 Google Scholar
Pauldrach, A., Puls, J., Kudritzki, R.P.: 1986, Astron. Astrophys. in press Google Scholar
Vogt, S.G., Penrod, C.D.: 1983, Astrophys. J. 275, 661 CrossRefGoogle Scholar
Waters, L.B.F.M., Wesselius, P.R.: 1986, Astron. Astrophys. 155, 104 Google Scholar
Waters, L.B.F.M.: 1986, Astron. Astrophys. in press Google Scholar
Willis, A.J.: 1982, Proceedings Workshop “Mass loss from astronomical objects”, Rutherford Appleton Laboratory, p. 1 Google Scholar