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Possible Proto-Planetary Nebulae

Published online by Cambridge University Press:  12 April 2016

M. Parthasarathy
M. Parthasarathy*
Affiliation:
Indian Institute of Astrophysics

Abstract

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IRAS data for high-galactic-latitude F supergiants, a few luminous F-G stars, and a few peculiar (forbidden) emission-line stars reveal they have dust shells with characteristics similar to those observed in planetary nebulae. The objects described here appear to have experienced severe mass loss in the recent past on the AGB. These stars are most likely post-AGB stars or evolving from the tip of AGB towards the left in the H-R diagram and may be described as possible proto-planetary nebulae. From the IRAS data we find ten additional possible proto-planetary nebulae. From the IRAS data of HD 56126, -53° 5072, HD 168625 and -59° 6723 the luminosities, temperatures and masses of the dust shells are derived. HD 56126 (F5I), HD 168625 (B8Iae), and -59° 6723 (B8Iae) appear to be in an evolutionary stage (post-AGB) similar to that of HD 161796 and HR 4049.

Type
5. Chromospheres, Winds and Mass Loss
Information
International Astronomical Union Colloquium , Volume 106: Evolution of Peculiar Red Giant Stars , 1989 , pp. 384 - 390
Copyright
Copyright © Cambridge University Press 1989

References

Bidelman, W.P. 1951. Astrophvs. J. 113, 304.Google Scholar
Bohm-Vltense, E. 1982, Astrophvs. J. 225, 192.Google Scholar
Fernle, J.D. 1986, Astrophvs. J., 306, 642.Google Scholar
Fernie, J.D., Garrison, R.F. 1984, Astrophvs. J.. 285, 698.Google Scholar
Iben, I. 1985, Quart, J. Roy. Astron. Soc.. 26, 1.Google Scholar
Iben, I., Renzlnl, A. 1983, Ann. Rev. Astron. Astrophvs.. 21, 271.Google Scholar
Klare, G-, Neckel, Th. 1977, Astron. Astrophvs. Suppl.. 27, 215.Google Scholar
Knapp, G.R. 1987, in Late Stages of Stellar Evolution, ed. Kwok, S. and Pottasch, S.R. (Reidel: Dordrecht), p. 103.Google Scholar
Knapp, G.R., Morris, M. 1985, Astrophvs. J., 292, 640.Google Scholar
Kwok, S. 1987, Astrophvs. J., 321. 975.Google Scholar
Lamers, H.J.G.L.M., Waters, L.B.F.M., Garmany, C.D., Perez, M.R., Waelkens, C. 1986, Astron. Astrophvs., 154, L20.Google Scholar
Le Bertre, T. 1987. Astron. Astrophvs., 180, 160.Google Scholar
Likkel, L., Omont, A., Morris, M., Forveille, T. 1987, Astron. Astrophvs. 173, L11.Google Scholar
Parthasarathy, M., Pottasch, S.R. 1986, Astron. Astrophvs., 154, L16.Google Scholar
Parthasarathy, M., Pottasch, S.R., Wamsteker, W. 1988. Astron. Astrophvs., 203. 117.Google Scholar
Parthasarathy, M., Pottasch, S.R. 1988, Astron. Astrophvs., (submitted).Google Scholar
Pottasch, S.R. 1984, Planetary Nebulae. Astrophys. Space Science Library. Vol. 107.Google Scholar
Pottasch, S.R., Bignelli, C., Zijlstra, A. 1987, Astron. Astrophvs., 177, L49.Google Scholar
Renzini, A. 1981, in Physical Processes in Red Giants ed. Iben, I., and Renzini, A. (Dordrecht: Reidel), p. 165.CrossRefGoogle Scholar
Sabbadin, F., Gratton, R.G., Bianchini, A., Ortolani, S. 1984, Astron. Astrophvs. 136, 181.Google Scholar
Stephenson, C.B., Sanduleak, N. 1971. Pubi. Warner and Swasev Obs. Vol. 1.Google Scholar
Van Genderen, A.M., Van Driel, W., Greidanus, H. 1986, Astron. Astrophvs. 155, 72.Google Scholar
Waelkens, C., Waters, L.B.F.M., Ccassatella, A., Le Bertre, T., Lamers, H.J.G.L.M. 1987. Astron. Astrophvs. 181, L5.Google Scholar
Zuckerman, B. 1978, In Planetary Nebulae, ed. Terzlan, Y. (Reidei: Dordrecht), p. 305.Google Scholar
Zuckerman, B., Dyck, H.M. 1986a, Astrophvs. J. (Letters). 304, 394.Google Scholar
Zuckerman, B., Dyck, H.M. 1986b, Astrophvs. J. 311, 345.Google Scholar
Zuckerman, B., Dyck, H.M., Claussen, M.J. 1986, Astrophvs. .1. 304, 401.Google Scholar