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CW Leonis, IRC+10216

Published online by Cambridge University Press:  12 April 2016

G.R. Knapp
G.R. Knapp*
Affiliation:
Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USA

Abstract

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CW Leo is the nearest and brightest example of a highly evolved carbon Mira variable red giant, and is surrounded by an extensive dusty, molecular circumstellar shell produced by mass loss. Since the shell heavily obscures the star, most of the information about CW Leo comes from observations of its shell, whose radial properties encode a history of the star as well as of the interaction between the outflowing gas and the interstellar radiation field. The shell of CW Leo contains a rich variety of molecules, from salts to cyanide, whose isotopic composition shows the effect of nuclear processing in the stellar interior and give information about the formation and composition of the circumstellar dust. This nearby star allows us a detailed look at one of the most eventful and interesting phases in a star’s evolution.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 187: Exotic Stars as Challenges to Evolution , 2002 , pp. 259 - 271
Copyright
Copyright © Astronomical Society of the Pacific 2002

References

Becklin, E.E., Frogel, J.A., Hyland, A.R., Kristian, J., & Neugebauer, G. 1969, ApJ, 158, L133 Google Scholar
Bieging, J.H., & Tafalla, M. 1993, AJ, 105, 576 Google Scholar
Chandrasekhar, T., & Mondal, S. 2001, MNRAS, 322, 356 Google Scholar
Cernicharo, J., & Guélin, M. 1987, A&A, 183, L1O Google Scholar
Cernicharo, J., Guélin, M., & Kahane, C. 2000, A&AS, 142, 181 Google Scholar
Cernicharo, J., et al. 1996, A&A, 315, L201 Google Scholar
Crabtree, D.R., & Rogers, C. 1993, in Mass Loss on the AGB and Beyond, ed. Schwartz, H. (Garching: ESO), 255 Google Scholar
Crasas, M., & Menten, K. 1997, ApJ, 483, 913 Google Scholar
Dahn, C.C., et al. 2002, AJ, 124, 1170 CrossRefGoogle Scholar
Engels, D. 1994, A&A, 285, 492 Google Scholar
Foy, R., Chelli, A., Sibille, F., & Lena, P. 1979, A&A, 79, L5 Google Scholar
Gensheimer, P.D., Likkel, L., & Snyder, L.E. 1995, ApJ, 439, 445 Google Scholar
Gezari, D.Y., Schmitz, M., Pitts, P.S., & Mead, J.L. 1993, NASA RP-1294Google Scholar
Gilliland, R.L., & Dupree, A.K. 1996, ApJ, 463, L29 Google Scholar
Glassgold, A.E. 1996, ARA&A, 34, 241 Google Scholar
Groenewegen, M.A.T. 1997, A&A, 317, 503 Google Scholar
Groenewegen, M.A.T., & Ludwig, H.-G. 1998, A&A, 339, 489 Google Scholar
Groenewegen, M.A.T., & Whitelock, P.A. 1996, MNRAS, 281, 1347 Google Scholar
Groenewegen, M.A.T., van der Veen, W.E.C.J., & Matthews, H.E. 1998 A&A, 338, 481 Google Scholar
Habing, H.J. 1986, A&AR, 7, 97 Google Scholar
Haniff, C.A., & Buscher, D.F. 1998, A&A, 334, L5 Google Scholar
Herbig, G.H., & Zappala, R.R. 1970, ApJ, 162, L15 CrossRefGoogle Scholar
Herpin, J., & Cernicharo, J. 2000, ApJ, 530, L129 CrossRefGoogle Scholar
Herpin, F., Goicoechea, J.R., Pardo, J.R., & Cernicharo, J. 2002, ApJ, in press (astro-ph/0206167)Google Scholar
Highberger, J.L., Savage, C., Bieging, J.H., & Ziurys, L.M. 2001, ApJ, 562, 790 Google Scholar
Huggins, P.J., Olofsson, H., & Johansson, L.E.B. 1988, ApJ, 332, 1009 CrossRefGoogle Scholar
Jura, M. 1983, ApJ, 275, 683 Google Scholar
Jura, M. 1994, ApJ, 434, 713 Google Scholar
Kahane, C., Dufour, E., Busso, M., Gallino, R., Lugaro, M., Forestini, M., & Straniero, O. 2000, A&A, 357, 669 Google Scholar
Karovska, M. 1999, in IAU Symp. 191, Asymptotic Giant Branch Stars, ed. Bertre, T.Le, Lèbre, A., & Waelkens, C. (San Francisco: ASP), 139 Google Scholar
Kastner, J.H., & Weintraub, D.A. 1994, ApJ, 434, 719 Google Scholar
Kawaguchi, K., Kasai, Y., Ishikawa, S.I., & Kaifu, N. 1995, PASJ, 47, 853 Google Scholar
Keady, J.J., & Ridgway, S.T. 1993, ApJ, 406, 199 Google Scholar
Knapp, G.R., Bowers, P.F., Young, k., & Phillips, T.G. 1994, ApJ, 429, L33 Google Scholar
Le Bertre, T. 1982, A&AS, 94, 377 Google Scholar
Le Bertre, T., & Gérard, E. 2001, A&A, 378, L29 Google Scholar
Lindqvist, M., Schöier, F.L., Lucas, R.L., & Olofsson, H. 2000, A&A, 361, 1036 Google Scholar
Lucas, R., Guélin, M., Kahane, C., Audinos, P., & Cernicharo, J. 1995, Ap&SS, 224, 293 Google Scholar
Mamon, G.A., Glassgold, A.E., & Huggins, P.J. 1988, ApJ, 328, 797 Google Scholar
Mastrodemus, N., & Morris, M. 1999, ApJ, 523, 357 Google Scholar
Mauron, N., & Huggins, P.J. 2000, A&A, 359, 707 Google Scholar
Melnick, J., Neufeld, D.A., Saavik Ford, K.E., Hollenbach, D.J., & Ashby, M.L. 2001, Nature, 412, 160 Google Scholar
Men’shchikov, A.B., Balega, Y.Y., Blöcker, T., Osterbart, R., & Weigelt, G. 2001, A&A, 368, 497 Google Scholar
Monnier, J.D., Danchi, W.C., Hale, D.S., Lipman, E.A., Tuthill, P.G., & Townes, C.H. 2000a, ApJ, 543, 861 Google Scholar
Monnier, J.D., Tuthill, P.G., & Danchi, W.C. 2000b, ApJ, 545, 957 Google Scholar
Morris, M. 1975, ApJ, 197, 603 Google Scholar
Neugebauer, G., & Leighton, R.B. 1969, in Two Micron Sky Survey - A Preliminary Catalog, NASA SP-3047 (Springfield: NTIS), 25 Google Scholar
Olofsson, H. 1999, in IAU Symp. 191, Asymptotic Giant Branch Stars, ed. Bertre, T.Le, Lèbre, A., & Waelkens, C. (San Francisco: ASP), 3 Google Scholar
Olofsson, H., et al. 1996, A&A, 311, 587 Google Scholar
Osterbart, R., Balega, Y.Y., Blöcker, T., Men’shchikov, A.B., & Weigelt, G. 2000, A&A, 169 Google Scholar
Sahai, R. 1987, ApJ, 318, 809 Google Scholar
Sahai, R., et al. 1998, ApJ, 493, 301 Google Scholar
Sandell, G. 1994, MNRAS, 271, 75 Google Scholar
Schöier, F., & Olofsson, H. 2001, A&A, 368, 969 Google Scholar
Schwarzschild, M. 1975, ApJ, 195, 137 Google Scholar
Skinner, C.J., Meixner, M., & Bobrowsky, M. 1998, MNRAS, 300, L29 Google Scholar
Solomon, P.M., Jefferts, K.B., Penzias, A.A., & Wilson, R.W. 1971, ApJ, 163, L53 Google Scholar
Szczerba, R., Chen, P.S., Szymczak, M., & Omont, A. 2002, A&A, 381, 491 Google Scholar
Tamura, M., et al. 1988, ApJ, 326, L17 Google Scholar
Truong-Bach, , Morris, D., & Nguyen-Q-Rieu, , 1991, A&A, 249, 435 Google Scholar
Tuthill, P.G., Monnier, J.D., Danchi, W.D., & Lopez, B. 2000, ApJ, 543, 284 Google Scholar
van der Veen, W.E.C.J., Omont, A., Habing, H.J., & Matthews, H.E. 1995, A&A, 295, 445 Google Scholar
Waters, L.B.F.M., et al. 1998, Nature, 391, 868 Google Scholar
Weigelt, G., Blöcker, T., Hofmann, K.-H., Osterbart, R., Balega, Y.Y., Fleischer, A.J., & Winters, J.M. 1999, in IAU Symp. 191, Asymptotic Giant Branch Stars, ed. Bertre, T.Le, Lèbre, A., & Waelkens, C. (San Francisco: ASP), 273 Google Scholar
Weigelt, G., et al. 1998, A&A, 333, L51 Google Scholar
Winters, J.M., Keady, J.J., Gauger, A., & Sada, P.V. 2000, A&A, 359, 651 Google Scholar
Young, K., Phillips, T.G., & Knapp, G.R. 1993, ApJS, 86, 517 Google Scholar
Ziurys, L., Savage, C., Highberger, J.L., Apponi, A.J., Guélin, M., & Cernicharo, J. 2002, ApJ, 564, L45 Google Scholar