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Born-again AGB stars: Starting point of the H-deficient post-AGB evolutionary sequence?

Published online by Cambridge University Press:  25 May 2016

K. Werner ,
S. Dreizler ,
T. Rauch ,
L. Koesterke  and
U. Heber
K. Werner
Affiliation:
Institut für Astronomie und Astrophysik, Univ. Tübingen, Germany
S. Dreizler
Affiliation:
Institut für Astronomie und Astrophysik, Univ. Tübingen, Germany
T. Rauch
Affiliation:
Institut für Astronomie und Astrophysik, Univ. Tübingen, Germany
L. Koesterke
Affiliation:
Institut für Physik, Universität Potsdam, Germany
U. Heber
Affiliation:
Sternwarte Bamberg, Universität Erlangen-Nürnberg, Germany

Abstract

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We discuss the origin of hot hydrogen-deficient post-AGB stars. Evidence is growing that the “born-again AGB star scenario” as a consequence of a late He shell flash cannot explain the diverse observations. Analyses of the stars and their associated planetary nebulae suggest that the H-deficiency is not formed during the second post-AGB phase but already while the star is still on the AGB. There are even hints that the H-deficiency can occur before the first departure from the AGB.

Type
Part 5. Non-Spherical Mass Loss, Binarity, Post-AGB Evolution
Information
Symposium - International Astronomical Union , Volume 191: Asymptotic Giant Branch Stars , 1999 , pp. 493 - 498
Copyright
Copyright © Astronomical Society of the Pacific 1999 

References

Borkowski, K.J., Harrington, J.P., Tsvetanov, Z.I., 1995, ApJ 449, L143 CrossRefGoogle Scholar
Dreizler, S., Heber, U., 1998, A&A 334, 618 Google Scholar
Dreizler, S., Heber, U., Napiwotzki, R., Hagen, H.-J., 1995, A&A 303, L53 Google Scholar
Dreizler, S., Werner, K., Heber, U., 1997, IAU Symp. 180, Kluwer, p. 103 Google Scholar
Górny, S.K., Stasińska, G., 1995, A&A 303, 893 Google Scholar
Hamann, W.-R., 1997, IAU Symp. 180, Kluwer, p. 91 Google Scholar
Herwig, F., Blöcker, T., Schönberner, D., El Eid, M., 1997, A&A 324, L81 Google Scholar
Husfeld, D., Butler, K., Heber, U., Drilling, J.S., 1989, A&A 222, 150 Google Scholar
Iben, I. Jr., 1984, ApJ 277, 333 Google Scholar
Iben, I. Jr., MacDonald, J., 1995, in White Dwarfs, eds. Koester, D. and Werner, K., Springer, Lecture Notes in Physics 443, p. 48 Google Scholar
Koesterke, L., Werner, K., 1998, ApJ 500, L55 CrossRefGoogle Scholar
Koesterke, L., Dreizler, S., Rauch, T., 1998, A&A 320, 1041 Google Scholar
Kruk, J.W., Werner, K., 1998, ApJ 502, 858 Google Scholar
Leuenhagen, U., Hamann, W.-R., 1998, A&A 330, 265 Google Scholar
Méndez, R.H., Niemela, V.S., 1982, IAU Symp. 99, p. 457 Google Scholar
Méndez, R.H., Miguel, C.H., Heber, U., Kudritzki, R.P., 1986, IAU Coll. 87, Reidel, Dordrecht, p. 323 Google Scholar
Napiwotzki, R., 1998, in The Third Conference on Faint Blue Stars, eds. Philip, A.G.D., Liebert, J. and Saffer, R.A., in press Google Scholar
Napiwotzki, R., Haas, S., Schönberner, D., 1996, in Hydrogen-Deficient Stars, eds. Heber, U. and Jeffery, C.S., ASP Conference Series 96, p. 213 Google Scholar
Pauldrach, A., Puls, J., Kudritzki, R.P., Méndez, R.H., Heap, S.R., 1988, A&A 207, 123 Google Scholar
Rauch, T., Köppen, J., Werner, K., 1994, A&A 286, 543 Google Scholar
Rauch, T., Köppen, J., Werner, K., 1996, A&A 310, 613 Google Scholar
Rauch, T., Dreizler, S., Wolff, B., 1998, A&A 338, 651 Google Scholar
Schönberner, D., 1983, ApJ 272, 708 Google Scholar
Schönberner, D., Blöcker, T., 1992, in The Atmospheres of Early-Type Stars, eds. Jeffery, C.S. and Heber, U., Springer, Lecture Notes in Physics 401, p. 305 Google Scholar
Waters, L.B.F.M., Beintema, D.A., Zijlstra, A.A., et al., 1998, A&A 331, L61 Google Scholar
Werner, K., 1991, A&A 251, 147 Google Scholar
Werner, K., Koesterke, L., 1992, in The Atmospheres of Early-Type Stars, eds. Jeffery, C.S. and Heber, U., Springer, Lecture Notes in Physics 401, p. 288 Google Scholar
Werner, K., Heber, U., Hunger, K., 1991, A&A 244, 437 Google Scholar
Werner, K., Dreizler, S., Heber, U., Rauch, T., Wisotzki, L., Hagen, H.-J., 1995, A&A 293, L75 Google Scholar
Werner, K., Dreizler, S., Heber, U., Rauch, T., 1996, in Hydrogen-Deficient Stars, eds. Heber, U. and Jeffery, C.S., ASP Conference Series 96, p. 267 Google Scholar
Wesemael, F., Green, R.F., Liebert, J., 1985, ApJS 58, 379 Google Scholar
Wood, P.R., Faulkner, D.J., 1986, ApJ 307, 659 CrossRefGoogle Scholar