Hostname: page-component-586b7cd67f-t7fkt Total loading time: 0 Render date: 2024-11-26T05:45:49.692Z Has data issue: false hasContentIssue false

Theoretical evolution of massive stars with mass loss by stellar wind.

Published online by Cambridge University Press:  14 August 2015

C. Chiosi
Affiliation:
Istituto di Astronomia di Padova
E. Nasi
Affiliation:
Istituto di Astronomia di Padova
G. Bertelli
Affiliation:
Istituto di Astronomia di Padova

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.

Although it was known since a long time that very luminous blue and red stars may show evidence of mass outflow, it was the advent of the Copernicus satellite that clearly ascertained all OB supergiants (and also the most luminous main sequence stars) are losing mass at rates that are significant for their evolutionary history. The observational information for blue luminous stars (O, Of and WR) has been recently reviewed by Conti (1978), who discussed in some detail the data available for different spectral regions. The rates of mass loss inferred from these observations are estimated to be in the range 10−7 to 10−5 M/yr for OB stars, and from 10−5 to 10−4 M/yr for WR stars. Several theoretical models have been proposed to explain those high mass-loss rates, and the high terminal velocities ranging from 1000 to 3000 km/sec. The two basic models are: the cool radiation pressure model, originally proposed by Lucy and Solomon (1970) and elaborated by Castor et al. (1975), in which the envelope is accelerated by momentum transfer from radiation to ions due to the ultraviolet line absorption; and the coronal model of Thomas (1973), and Hearn (1975), where the wind is sustained by gas pressure in a hot corona around the star. As both models do not completely account for the observations, several complementary modifications have been suggested. The nowaday situation is reviewed by Cassinelli and Lamers (1978), and Conti (1978).

Type
Session 6: Evolution with Mass Loss: Single Stars
Copyright
Copyright © Reidel 1979 

References

Abbott, D.C.: 1978, preprint Google Scholar
Arnett, D.W.: 1978, Astrophys. J. 219, 1008 Google Scholar
Barbaro, G., Chiosi, C.: 1973, Astron. Astrophys. 28, 7 Google Scholar
Barlow, M.J., Cohen, M.: 1977, Astrophys. J. 213, 737 Google Scholar
Bernat, A.P.: 1977, Astrophys. J. 213, 756 Google Scholar
Cassinelli, J.P., Lamers, N.J.G.L.M.: 1978, preprint Google Scholar
Castor, J.I., Abbott, D.C., Klein, R.I.: 1975, Astrophys. J. 195, 157 CrossRefGoogle Scholar
Chiosi, C.: 1978a, preprint Google Scholar
Chiosi, C.: 1978b, in Proc. I.A.U. Symposium Nd 80, Washington D.C., in press Google Scholar
Chiosi, C., Caimmi, R.: 1978, preprint Google Scholar
Chiosi, C., Nasi, E.: 1974, Astron. Astrophys. 34, 355 Google Scholar
Chiosi, C., Nasi, E., Sreenivasan, S.R.: 1978a, Astron. Astrophys. 63, 103 Google Scholar
Chiosi, C., Nasi, E., Bertelli, G.: 1978b, submitted to Astron. Astrophys. Google Scholar
Czerny, M.: 1978, preprint Google Scholar
Conti, P.S.: 1976, Mem. Soc. Roy. Sci. Liège 6d Serie 9, 193 Google Scholar
Conti, P.S.: 1978, Ann. Rev. Astron. Astrophys., in press Google Scholar
Dearborn, D.S.P., Blake, J.B., Haineback, K.L., Schramm, D.N.: 1978, Astrophys. J. in press Google Scholar
de Loore, C., De Greve, J.P., Lamers, H.J.G.L.M.: 1977a, Astron. Astrophys. 61, 251 Google Scholar
de Loore, C., De Grève, J.P., Vanbeveren, D.: 1977b, preprint Google Scholar
Fusi-Pecci, F., Renzini, A.: 1975, Mem. Soc. Roy. Sci. Liège 6d Serie 8, 383 Google Scholar
Hearn, A.G.: 1975, Astron. Astrophys. 40, 355 Google Scholar
Hutchings, J.B.: 1976, Astrophys. J. 203, 438 Google Scholar
Luck, R.E.: 1977a, Astrophys. J. 212, 743 Google Scholar
Luck, R.E.: 1977b, Astrophys. J. 218, 752 Google Scholar
Luck, R.E.: 1978, Astrophys. J. 219, 148 Google Scholar
Lucy, L.B., Solomon, P.M.: 1970, Astrophys. J. 159, 879 Google Scholar
Moffat, A.F.J., Seggewiss, W.: 1978, preprint Google Scholar
Paczynski, B.: 1973, in Wolf Rayet and High Temperature Stars, Ed. Bappu, M.K.V. and Sahade, J. (Dordrecht, Reidel) p. 143 Google Scholar
Reimers, D.: 1975, Mem. Soc. Roy. Sci. Liège 6d Serie 8, 366 Google Scholar
Schwarzschild, M., Härm, R.: 1958, Astrophys. J. 128, 348 Google Scholar
Smith, L.F.: 1973, in Wolf Rayet and High Temperature Stars, Ed. Bappu, M.K.V. and Sahade, J. (Dordrecht, Reidel) p. 15 Google Scholar
Snow, T.P., Morton, D.C.: 1976, Astrophys. J. Suppl. 32, 429 Google Scholar
Stothers, R., Chin, C.W.: 1976, Astrophys. J. 204, 472 Google Scholar
Thomas, R.N.: 1973, Astron. Astrophys. 29, 297 Google Scholar