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Non-LTE line blanketed atmospheres for hot stars

Published online by Cambridge University Press:  25 May 2016

D. J. Hillier
D. J. Hillier*
Affiliation:
University of Pittsburgh, USA

Abstract

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The modeling of hot star atmospheres falls into two broad classes: those where the plane parallel approximation can be used, and those where the effects of spherical extension and stellar winds are important. In both cases non-LTE modeling is a necessity for reliable spectroscopic analyses.

While simple ions (e.g., H, He I, and He II) have been treated routinely in non-LTE for many years it is only recently that advances in computing power, computational techniques, and the availability of atomic data have made it feasible to perform non-LTE line blanketing calculations. Present models, with varying degrees of approximation and sophistication, are now capable of treating the effects of tens of thousands of lines. We review the latest efforts in incorporating non-LTE line blanketing, highlighting recent advances in the modeling of 0 stars, hot sub-dwarfs, Wolf-Rayet stars, novae, and supernovae.

Type
Stellar Atmospheres
Information
Symposium - International Astronomical Union , Volume 189: Fundamental Stellar Properties: The Interaction Between Observation and Theory , 1997 , pp. 209 - 216
Copyright
Copyright © Kluwer 1997 

References

Abbott, D.C., Lucy, L.B. 1985, ApJ, 288, 679 CrossRefGoogle Scholar
Anderson, L.S., 1985, ApJ, 298, 848 Google Scholar
Anderson, L.S., 1989, ApJ, 339, 558 Google Scholar
Auer, L.H., Mihalas, D., 1969, ApJ, 158, 641 Google Scholar
Dreizler, S., Werner, K., 1993, A&A, 278, 199 Google Scholar
Eastman, R.G., Pinto, P.A., 1993, ApJ, 412, 731 Google Scholar
Grigsby, J.A., Morrison, N.D., Anderson, L.S., 1992, ApJS, 78, 205 Google Scholar
Haas, S., Dreizler, S., Heber, U., Jeffery, S., Werner, K., 1996, A&A, 311, 669 Google Scholar
Hauschildt, P.H., Ensman, L.M. 1994, ApJ, 424, 905 Google Scholar
Hauschildt, P.H., Wehrse, R., Starrfield, S., Shaviv, G., 1992, ApJ, 393, 307 CrossRefGoogle Scholar
Hauschildt, P.H., Starrfield, S, Austin, S., et al. 1994, ApJ, 422, 831 Google Scholar
Hauschildt, P.H., Starrfield, S, Shore, S.N., Allard, F., Baron, E., 1995, ApJ, 447, 829 CrossRefGoogle Scholar
Herrero, A., Kudritzki, R.P., Vilchez, J.M., et al. 1992, A&A, 261, 209 Google Scholar
Hillier, D.J. 1990, A&A, 231, 116 Google Scholar
Hillier, D.J., 1996, in Wolf-Rayet Stars in the Framework of Stellar Evolution, proc. 33rd Liege International Astrophys. Col. (Institut d'Astrophysique, Liege), p. 509 Google Scholar
Hillier, D.J., Miller, D.L., 1997, submitted to APJ Google Scholar
Hubeny, I., 1992, in lecture Notes in Physics, 401, The Atmospheres of Early Type Stars, eds. Heber, U., Jeffery, C.S. (Belin: Springer-Verlag), p377 Google Scholar
Hubeny, I., Hummer, D.G., Lanz, T., 1994, A&A, 282, 151 Google Scholar
Hubeny, I., Lanz, T., 1995, ApJ, 439, 875 Google Scholar
Hummer, D.G., Abbott, D.C., Voels, S.A., Bohannan, B., 1988, ApJ, 328, 704 Google Scholar
Kudritzki, R.P., Hummer, D.G., 1990, ARA&A, 28, 303 Google Scholar
Kudritzki, R.P., Hummer, D.G., Pauldrach, A.W.A., et al. 1992, A&A, 257, 655 Google Scholar
Lanz, T., De Koter, A., Hubeny, I., Heap, S.R. 1996, ApJ, 465, 359 Google Scholar
Lucy, L.B., Abbott, D.C., 1993, ApJ, 405, 738 CrossRefGoogle Scholar
Pauldrach, A.W.A., Duschinger, M., Mazzali, P.A., et al. 1996, A&A, 312, 525 Google Scholar
Rybicki, G.B., 1991, in Stellar Atmospheres: Beyond Classical Models , NATO ASI series C, V341, eds. Crivellari, L., Hubeny, I., Hummer, D.G., (Kluwer, Dordrecht), p. 1 Google Scholar
Schmutz, W., 1991, in Stellar Atmospheres: Beyond Classical Models , NATO ASI series C, V341, eds. Crivellari, L., Hubeny, I., Hummer, D.G., (Kluwer, Dordrecht) p.191 Google Scholar
Schmutz, W., Abbott, D. C., Russell, R. S., et al. 1990, ApJ, 355, 255 Google Scholar
Seaton, M. J. 1987, J. Phys. B, 20, 6363 Google Scholar