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Observations of Mass Loss and Circumstellar Matter around Cool Carbon Stars

Published online by Cambridge University Press:  25 May 2016

T. Lloyd Evans
T. Lloyd Evans*
Affiliation:
South African Astronomical Observatory, Observatory 7935, South Africa

Abstract

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Spectroscopy and infrared photometry of carbon stars show three distinct forms of circumstellar matter. IRAS 12311-3509 probably has an edge-on disk and the spectrum is dominated by resonance emission from atoms and molecules in the vicinity. The long-period variables V Hya and R Lep are undergoing deep fadings, apparently caused by dust formation around the star, while variable emission from circumstellar gas is seen. The semiregular variable T Mus showed absorption bands from very cool material during an unusual episode in 1994.

Type
Session VIII — Circumstellar Shells
Information
Symposium - International Astronomical Union , Volume 177: The Carbon Star Phenomenon , 2000 , pp. 367 - 375
Copyright
Copyright © Kluwer 2000 

References

Barnbaum, C., Morris, M. & Kahane, C. 1995, ApJ, 450, 862 CrossRefGoogle Scholar
Beichman, C. A., Neugebauer, G., Habing, H. J., Clegg, P. E. & Chester, T. J. 1988, Infrared Astronomical Satellite (IRAS) Catalogs and Atlases, Vols. 1–6, National Aeronautics and Space Administration, Washington, D.C. Google Scholar
Bessell, M. S. & Wood, P. R. 1983, MNRAS, 202, 31P CrossRefGoogle Scholar
Feast, M. W., Whitelock, P. A., Catchpole, R. M., Roberts, G. & Overbeek, M. D. 1984, MNRAS, 211, 331 CrossRefGoogle Scholar
Fleischer, A. J., Gauger, A. & Sedlmayr, E. 1992, A&A, 266, 321 Google Scholar
Gillett, F. C., Merrill, K. M. & Stein, W. A. 1971, ApJ, 164, 83 CrossRefGoogle Scholar
Herbig, G. H. 1970, ApJ, 162, 557 CrossRefGoogle Scholar
Hoyle, F. & Wickramasinghe, N. C. 1962, MNRAS, 124, 417 CrossRefGoogle Scholar
Kahane, C., Maizels, C. & Jura, M. 1988, ApJ, 328, L25 CrossRefGoogle Scholar
Keenan, P. C. 1993, PASP, 105, 905 CrossRefGoogle Scholar
Le Bertre, T. 1992, A&AS, 94, 377 Google Scholar
Lloyd Evans, T. 1989, in Evolution of Peculiar Red Giant Stars, ed. Johnson, H. R. and Zuckerman, B. (Cambridge Univ. Press), p. 241 Google Scholar
Lloyd Evans, T. 1991a, MNRAS, 248, 479 CrossRefGoogle Scholar
Lloyd Evans, T. 1991b, MNRAS, 249, 409 CrossRefGoogle Scholar
Lloyd Evans, T. 1997, MNRAS, 286, 839 CrossRefGoogle Scholar
Lysaght, M. G. 1989, JAAVSO, 18, 17 Google Scholar
Mattei, J. A. & Foster, G. 2000, in IAU Symp. 177: The Carbon Star Phenomenon, ed. Wing, R. F. (Kluwer), p. 155 Google Scholar
Mattei, J. A., Mayall, M. W. & Waagen, E. O. 1990, Maxima and Minima of Long Period Variables (Cambridge, Mass.: American Association of Variable Star Observers)Google Scholar
Mayall, M. W. 1963, JRASC, 57, 237 Google Scholar
Mayall, M. W. 1965, JRASC, 59, 245 Google Scholar
Percy, J. R., Colivas, T., Sloan, W. B. & Mattei, J. A. 1990, in Confrontation between Stellar Pulsation and Evolution, ed. Cacciari, C. and Clementini, G., ASP Conf. Ser., 11, 446 Google Scholar
Sahai, R. & Wannier, P. G. 1988, A&A, 201, L9 Google Scholar
Sarre, P. J., Hurst, M. E. & Lloyd Evans, T. 1996, ApJ, 471, L107 CrossRefGoogle Scholar
Sarre, P. J., Hurst, M. E. & Lloyd Evans, T. 2000, in IAU Symp. 177: The Carbon Star Phenomenon, ed. Wing, R. F. (Kluwer), p. 576 Google Scholar
Tsuji, T., Unno, W., Kaifu, N., Izumiura, H., Ukita, N., Cho, S. & Koyama, K. 1988, ApJ, 327, L23 CrossRefGoogle Scholar
Whitelock, P. A. 2000, in IAU Symp. 177: The Carbon Star Phenomenon, ed. Wing, R. F. (Kluwer), p. 179 Google Scholar
Winters, J. M., Fleischer, A. J., Gauger, A. & Sedlmayr, E. 1994, A&A, 290, 623 Google Scholar
Woolf, N. J. & Ney, E. P. 1969, ApJ, 155, L181 CrossRefGoogle Scholar