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Dense Knots in High Latitude Molecular Clouds

Published online by Cambridge University Press:  07 August 2017

Leo Blitz*
Affiliation:
Astronomy Department, University of Maryland College Park, MD, 20742 USA

Abstract

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The high latitude molecular clouds are discussed in the context of the formation of very low mass condensations: protojupiters. The ability to identify such objects is intimately tied to the resolution of the current debate concerning the density of the condensations inferred from observations of high density tracers. At the heart of the debate is whether inclusion of electron excitation plays an important role in the determination of column densities. A brief review of molecular abundances shows that with the possible exception of H2CO, the molecular abundances in the high latitude molecular clouds are not abnormal.

Type
Solar System
Copyright
Copyright © Kluwer 1992 

References

REFERENCES

Blitz, L., Maganani, L, and Mundy, L. (1984), Ap. J. (Letters) , 282, L9.Google Scholar
Blitz, L., Maganani, L, and Mundy, L. (1984), Ap. J. (Letters) , 282, L9.Google Scholar
Blitz, L., Bazell, D., and Désert, F.X., 1988, Ap. J. (Letters) , 352, L13.Google Scholar
Désert, F.X., Bazell, D., and Blitz, L., 1990, Ap. J. (Letters) , 355, L51.Google Scholar
Gredel, R., van Dishoeck, E.F., de Vries, C.P., and Black, J.H., 1991, Astr. Ap , in press.Google Scholar
Grossman, V., Heithausen, A., Meyerdierks, H., and Mebold, U. 1990, Astr. Ap , 240, 400.Google Scholar
Heiles, C., Reach, W.T., and Koo, B.-C., 1988, Ap. J. , 322, 313.Google Scholar
Hobbs, L.M., Blitz, L. and Magnani, , 1986, Ap. J. (Letters) , 306, L109.Google Scholar
Knapp, G.R., and Bowers, P.F. 1988 Ap. J. , 331, 974.Google Scholar
Kroupa, P., Tout, C.A., and Gilmore, G. 1991, M.N.R.A.S. , 251, 293.Google Scholar
Lynds, B.T., 1962, Ap. J. Suppl. , 7, 1.Google Scholar
Magnani, L., Blitz, L., and Mundy, L., 1985, Ap. J. , 295, 402.Google Scholar
Magnani, L., and de Vries, C.P., 1986, Astr. Ap , 168, 271.Google Scholar
Magnani, L., Blitz, L., and Wouterloot, J.G.A., 1988, Ap. J. , 326, 909.Google Scholar
Magnani, L., Caillault, J.-P., an Armus, L. 1990 Ap. J. , 357, 602.Google Scholar
Magnani, L., and Siskind, L. 1990, Ap. J. , 359, 355.CrossRefGoogle Scholar
Mebold, U., Cernicharo, J., Velden, L., Reif, K., Crezelius, C., and Georigk, W., 1985, Astr. Ap , 151, 427.Google Scholar
Meyerdierks, H., Brouillet, N., and Mebold, U. 1990, Astr. Ap , 230, 172.Google Scholar
Turner, B.E., Rickard, L. J., and Xu., L-P., 1989, Ap. J. , 344, 292.Google Scholar
van Dishoeck, E.F., and Black, J.H., 1989, Ap. J. , 340, 273.Google Scholar
van Dishoeck, E.F., Black, J.H., Phillips, T.G., and Gredel, R., 1991, Ap. J. , 366, 141.Google Scholar