Hostname: page-component-586b7cd67f-rcrh6 Total loading time: 0 Render date: 2024-11-23T00:26:22.182Z Has data issue: false hasContentIssue false
  • English
  • Français

Cool Star Winds – Recent Observations and Theoretical Implications

Published online by Cambridge University Press:  30 March 2016

L. Hartmann
L. Hartmann*
Affiliation:
Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, U.S.A.

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.

Much of our knowledge of winds from late-type stars comes from the detection of ejected material, called circumstellar shells, as observed in absorption lines of low-excitation species such as Mg II, Ca II, Na I, and K I (cf. Reimers 1977). Observations of CS shells are difficult to translate into quantitative mass loss rates, a limitation which has not helped to test various mass loss mechanisms. The data clearly demonstrate one very important fact: shell velocities are very low. In fact, they are so much lower than surface escape velocitiesthat it was not clear that material is actually being lost until Deutsch (1956) detected the existence of the CS absorption shells ejected from α Her and α Sco in the spectra of distant companion stars. Today it is possible to demonstrate the expansion of shells out to several thousand stellar radii in K I scattering (Honeycutt et al. 1980).

Type
Joint Discussions
Information
Highlights of Astronomy , Volume 6: Highlights of Astronomy. As presented at the XVIIIth General Assembly of the IAU, 1982 , 1983 , pp. 549 - 563
Copyright
Copyright © Reidel 1983

References

Altenhoff, W.J., Oster, L., and Wendker, H.J.: 1979, Astron. Astrophys., 73, L21.Google Scholar
Ayres, T.R., Linsky, J.L., Basri, G.S., Landsman, W., Henry, R.C., Moos, H.W., and Stencel, R.E.: 1982, Astrophys. J., 256, 550.Google Scholar
Belcher, J.W.: 1971, Astrophys. J., 168, 509.Google Scholar
Belcher, J.W., and Davis, R.L.: 1971, J. Geophys. Res., 76, 3534.Google Scholar
Belcher, J.W., and Olbert, S.: 1975, Astrophys. J., 200, 369.Google Scholar
Bowers, P.F., and Kundu, M.R.: 1979, Astron. J., 84, 791.Google Scholar
Brown, A., and Jordan, C.: 1980, Monthly Not. Roy. Astron. Soc., 191, 37p.Google Scholar
Cram, L.E., Giampapa, M.S., and Imhoff, C.L.: 1980, Astrophys. J., 238, 905.CrossRefGoogle Scholar
De Campli, W.: 1981, Astrophys. J., 214, 124.CrossRefGoogle Scholar
Deutsch, A.J.: 1956, Astrophys. J., 123, 210.Google Scholar
Draine, B.T.: 1981, in Physical Processes in Red Giants, ed. I., Iben Jr. and Renzini, A., Reidel, Dordrecht, p. 317.CrossRefGoogle Scholar
Dupree, A.K., and Baliunas, S.L.: 1979, IAU Circular No. 3435.Google Scholar
Dupree, A.K., and Hartmann, L.: 1980, in IAU Colloq. 51, ed. Gray, D. F. and Linsky, J. L. , Springer, Heidelberg, p. 279.Google Scholar
Gahm, G.F.: 1980, Astrophys. J. (Letters), 242, L163.Google Scholar
Gahm, G.F., Lago, M.T.V.T., and Penston, M.V.: 1981, Monthly Not. Roy. Astron. Soc, 195, 59P.Google Scholar
Goldberg, L.: 1979, Quarterly Journ. Roy. Astron. Soc., 20, 361.Google Scholar
Goldberg, L., Hege, E.K., Hubbard, E.N., Strittmatter, P.A., and Cocke, W.J.: 1982, in Second Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun, ed. Giampapa, M. S. and Golub, L., SAO Special Report 392, p. 131.Google Scholar
Haisch, B.M., Linsky, J.L., and Basri, G.S.: 1980, Astrophys. J., 235, 519.Google Scholar
Hartmann, L.: 1981, in Solar Phenomena in Stars and Stellar Systems, ed. Bonnet, R. M. and A. K., Dupree, Reidel, Dordrecht, p. 331.Google Scholar
Hartmann, L.: 1982, Astrophys. J. Suppl., 48, 109.Google Scholar
Hartmann, L., Dupree, A.K., and Raymond, J.C.: 1980, Astrophys. J. (Letters):, 236, L143.Google Scholar
Hartmann, L., Dupree, A.K., and Raymond, J.C.: 1981, Astrophys. J., 246, 193.Google Scholar
Hartmann, L., Edwards, S., and Avrett, E.H.: 1982, Astrophys. J., in press.Google Scholar
Hartmann, L., and MacGregor, K.B.: 1980, Astrophys. J., 242, 260.Google Scholar
Hartmann, L., MacGregor, K.P., and Avrett, E.H.: 1982, in preparation.Google Scholar
Hayes, D.P.: 1980, Astrophys. J. (Letters), 241, L165.Google Scholar
Hollweg, J.V.: 1973, Astrophys. J., 181, 547.Google Scholar
Honeycutt, R.K., Bernat, A.P., Kephart, J.E., Gow, C.E., Sanford, M. T., and Lambert, D.L.: 1980, Astrophys. J., 239, 565.Google Scholar
Jacques, S.A.: 1978, Astrophys. J., 226, 632.Google Scholar
Jura, M., and Morris, M.: 1981, Astrophys. J., 251, 181.Google Scholar
Krautter, J., and Bastian, V.: 1980, Astron. Astrophys., 88, L6.Google Scholar
Linsky, J.L., and Haisch, B.M.: 1979, Astrophys. J. (Letters), 229, L27.Google Scholar
Newell, R.T., and Hjellming, R.M.: 1982, Astrophys. J. (Letters), in press.Google Scholar
Reimers, D.: 1974, Mem. Soc. Roy. Liege, 6e Serie, 8, p. 369.Google Scholar
Reimers, D.: 1977, Astron. Astrophys., 57, 395.Google Scholar
Reimers, D.: 1982, Astron. Astrophys., in press.Google Scholar
Schwarzschild, M.: 1974, Astrophys. J., 195, 137.Google Scholar
Simon, T., Linsky, J.L., and Stencel, R.E.: 1982, Astrophys., J., in press.Google Scholar
Stencel, R.E., and Mullan, D.J.: 1981, Astrophys. J., 238, 221.CrossRefGoogle Scholar
Stencel, R.E., Linsky, J.L., Brown, A., Jordan, C., Carpenter, K.G., Wing, R.F., and Czyzak, S.: 1981, Monthly Not. Roy. Astron. Soc., 196, 47P.CrossRefGoogle Scholar
Sutton, E.C., Storey, J.W.V., Betz, A.L., Townes, C.H., and Spears, D.L.: 1977, Astrophys. J. (Letters), 217, L97.Google Scholar
Vaiana, G.S. et al.: 1981, Astrophys. J., 245, 163.Google Scholar
Walter, F.M., and Kuhi, L.V.: Astrophys. J., 250, 254.Google Scholar
White, N.M., Kreidl, T.J., and Goldberg, L.: 1982, Astrophys. J., 254, 670.Google Scholar
Willson, L.A., and Hill, S.J.: 1979, Astrophys. J., 228, 854.Google Scholar
Wilson, O. C., and Abt, H.A.: 1954, Astrophys. J. Suppl., 1, 1.Google Scholar
Wing, R.F., and Carpenter, K.G.: 1979, Bull. AAS., 11, 419.Google Scholar
Wischniewski, E., and Wendker, H.J.: 1981, Astron. Astrophys., 96, 102.Google Scholar
Wright, K.O.: 1980, in Stellar Turbulence, IAU Colloq. 51, ed. Gray, D. F. and Linsky, J. L., Springer, Heidelberg, p. 144.Google Scholar