Abstract
So far, the evolution of post-AGB stars is not fully understood. In particular the formation of hydrogen-deficient and hydrogen-free Central Stars of Planetary Nebulae (CSPN) is unsettled. New evolution models, which allow for the consistent treatment of the physics of late thermalpulses, promise new insights to the formation of these stars. In this paper we summarize the results of non-LTE analyses of CSPN with wind. By comparing these results with the predictions of the new evolutionmodels, open questions concerning the evolution of the stars might be answered. In addition we discuss the driving mechanism of the winds of Wolf-Rayet CSPN. New models, which account for millions of iron lines, support the assumptions that these winds are driven by radiation.
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Barlow, M.J., Blades, J.C. and Hummer, D.G.: 1980, ApJ 241, L27.
De Marco, O., Storey, P.J. and Barlow, M.J.: 1997, MNRAS 297, 999.
De Marco, O. and Crowther, P.A.: 1998, MNRAS 296, 419.
De Marco, O. and Crowther, P.A.: 1999, MNRAS 306, 931.
Dreizler, S., Heber, U., Napiwotzki, R. and Hagen, H.J.: 1995a, A&A 303, L53.
Dreizler, S., Werner, K. and Heber, U.: 1995b in: White Dwarfs, D. Koester and K. Werner (eds.), Lecture Notes in Physics, Springer-Verlag, p. 160.
Freytag, B., Ludwig, H.-G. and Steffen, M.: 1996, A&A 313, 497.
Hamann, W.-R. and Koesterke, L.: 1998, A&A 335, 1003.
Hillier, J.: 1984, ApJ 280, 744.
Hillier, J.: 1990, A&A 231, 111.
Herwig, F., Blöcker, T. and Schönberner, D.: 1997, A&A 324, L81.
Iben, I. Jr.: 1984, ApJ 277, 333.
Iben, I. Jr. and McDonald, J.: 1995, in: White Dwarfs, D. Koester and K. Werner (eds.), Lecture Notes in Physics, Springer-Verlag, p. 160.
Koesterke, L. and Hamann, W.-R.: 1997a, A&A 320, 91.
Koesterke, L. and Hamann, W.-R.: 1997b, in: Planetary Nebulae IAU Symp. 180, H.J. Habing and H.J.G.L.M. Lamers (eds.), Kluwer Academic Publishers.
Koesterke, L. and Werner, K.: 1998, ApJ Letters 500, 55.
Koesterke, L., Dreizler, S. and Rauch, T.: 1998, A&A 320, 1041.
Leuenhagen, U. and Hamann, W.-R.: 1998, A&A 330, 265.
Leuenhagen, U., Hamann, W.-R. and Jeffery, C.S.: 1996, A&A 312, 167.
Leuenhagen, U. and Hamann, W.-R.: 1994, A&A 283, 567.
Leuenhagen, U., Koesterke, L. and Hamann, W.-R.: 1993, Acta Astronomica 43, 329.
Lucy, L.B. and Abbott, D.C.: 1993, ApJ 405, 738.
Werner, K. and Koesterke, L.: 1992, in: The Atmospheres of Early-Type Stars, Lecture Notes in Physics 401, Springer Verlag, p. 288.
Werner, K., Heber, U. and Fleming, T.A.: 1994, A&A 284, 907.
Werner, K., Hamann, W.-R., Heber, U., Napiwotzki, R., Rauch, T. and Wessolowski, U.: 1992, A&A 259, L69.
Werner, K., Dreizler, S., Heber, U., Rauch, T., Wisotzki, L. and Hagen, H.-J.: 1995, A&A 293, L75.
Werner, K., Hamann, W.-R., Heber, U., Napiwotzki, R., Rauch, T. and Wessolowski, U.: 1992, A&A 259, L69.
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Koesterke, L. Spectral analyses of WR-type central stars of planetary nebulae. Astrophysics and Space Science 275, 41–52 (2001). https://doi.org/10.1023/A:1002787918246
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DOI: https://doi.org/10.1023/A:1002787918246