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Chemistry in the LMC and SMC

Published online by Cambridge University Press:  25 May 2016

L.E.B. Johansson
L.E.B. Johansson*
Affiliation:
Onsala Space Observatory, S-439 92 Onsala, Sweden

Abstract

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Molecular abundances derived in a sample of CO complexes in the Magellanic Clouds are discussed. With a possible exception of HCO+, the chemical compositions observed in this sample show a striking uniformity. The data indicate that the molecular concentrations are down by a factor of 5 in the SMC, relative those observed in a cloud associated with the H II region N159 in the LMC. A similar difference seems to exist within the LMC, between the 30 Doradus region and the N159 area. An estimate of the electron abundance in the N159 cloud is presented, based on a recent detection of DCO+.

Type
Galaxies
Information
Symposium - International Astronomical Union , Volume 178: Molecules in Astrophysics: Probes and Processes , 1997 , pp. 515 - 524
Copyright
Copyright © Kluwer 1997 

References

Adams, N.G., Smith, D. 1984, ApJ 284, L13.Google Scholar
Bel, N., Viala, Y.P., Guidi, I. 1986, A&A 160, 301.Google Scholar
Blake, G.A., Sutton, E.C., Masson, C.R., Phillips, T.G. 1987, ApJ 315, 621.Google Scholar
Booth, R.S. 1993, in New Aspects of Magellanic Cloud Research, eds. Baschek, B., Klare, G., Lequeux, J., (Berlin: Springer) p.26.Google Scholar
Dufour, R.J. 1984, in Structure and Evolution of the Magellanic Clouds, IAU Symp. 108, eds. van den Bergh, S., de Boer, K.S., (Dordrecht: Reidel) p.353.Google Scholar
Heikkilä, A., Johansson, L.E.B., Olofsson, H. 1996, A&A, submitted.Google Scholar
Herbst, E. 1982, A&A 111, 76.Google Scholar
Hjalmarson, Å., Bergman, P. 1992, in Chemistry and Spectroscopy of Interstellar Molecules, eds. Bohme, D.K., Herbst, E., Kaifu, N., Saito, S., (University of Tokyo press) p.41.Google Scholar
Israel, F.P., Johansson, L.E.B., Lequeux, J., Booth, R.S., Nyman, L.-Å., Crane, P., Rubio, M., de Graauw, Th., Kutner, M.L., Gredel, R., Boulanger, F., Garay, G., Westerlund, B. 1993, A&A 276, 25.Google Scholar
Israel, F.P., Maloney, P.R., Geis, N., Herrmann, F., Madden, S.C., Poglitsch, A., Stacey, G.J. 1996, ApJ 465, 738.Google Scholar
Johansson, L.E.B., Olofsson, H., Hjalmarson, Å., Gredel, R., Black, J.H. 1994, A&A 291, 89.Google Scholar
Koornneef, J. 1984, in Structure and Evolution of the Magellanic Clouds, IAU Symp. 108, eds. van den Bergh, S., de Boer, K.S., (Dordrecht: Reidel) p.333.Google Scholar
Larsson, M., Lepp, S., Dalgarno, A., Strömholm, C., Sundström, G., Zengin, V., Danared, H., Källberg, A., af Ugglas, M., Datz, S. 1996, A&A 309, L1.Google Scholar
Lequeux, J., Le Bourlot, J., Pineau des Forêts, G., Roueff, E., Boulanger, P., Rubio, M. 1994, A&A 292, 371.Google Scholar
Maloney, P., Black, J.H. 1988, ApJ 325, 389.Google Scholar
Millar, T.J., Herbst, E. 1990, MNRAS 242, 92.Google Scholar
Mochizuki, K., Nakagawa, T., Doi, Y., Yui, Y.Y., Okuda, H., Shibai, H., Yui, M., Nishimura, T., Low, F.J. 1994, ApJ 430, L37.CrossRefGoogle Scholar
Poglitsch, A., Krabbe, A., Madden, S.C., Nikola, T., Geis, N., Johansson, L.E.B., Stacey, G.J., Sternberg, A. 1995, ApJ 454, 293.CrossRefGoogle Scholar
Rubio, M., Lequeux, J., Boulanger, F., Booth, R.S., Garay, G., de Graauw, Th., Israel, F.P., Johansson, L.E.B., Kutner, M.L., Nyman, L.-Å. 1993, A&A 271, 1.Google Scholar
Sternberg, A., Dalgarno, A. 1995, ApJS 99, 565.Google Scholar
Störzer, H., Stutzki, J., Sternberg, A. 1996, A&A 310, 592.Google Scholar
Watson, W.D. 1976, Rev. Mod. Phys. 48, 513.Google Scholar