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Molecular Clouds at High z

Published online by Cambridge University Press:  03 August 2017

Leo Blitz
Leo Blitz*
Affiliation:
Astronomy Program University of Maryland College Park, Maryland, U.S.A. 20742

Abstract

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The evidence for the existence of molecular clouds at large distances from the Galactic plane is reviewed. The molecular clouds at high Galactic latitudes are shown to be largely confined to the Galactic plane. There is evidence for one giant molecular cloud as much as four scale heights from the Galactic plane, but given the sample size from which the cloud is drawn, it is reasonable to suppose that it is part of the tail of the thin disk population. There is weak evidence that one star-forming molecular cloud may have originated in the Galactic halo. On the basis of kinematic evidence however, it is shown that there are three molecular clouds identified at high galactic latitude that, if not at high z, are likely to have resulted from interaction with gas in the halo. Understanding how these clouds have formed is likely to be an important key to understanding how the halo interacts with the disk gas.

Type
I. The Disk-Halo Interface in Our Galaxy
Information
Symposium - International Astronomical Union , Volume 144: The Interstellar Disk-Halo Connection in Galaxies , 1991 , pp. 41 - 51
Copyright
Copyright © Kluwer 1991 

References

REFERENCES

Bahcall, J.N., 1984, Ap. J. , 276, 169.CrossRefGoogle Scholar
Bash, F.N., Green, E., and Peters, W.L., 1977, Ap. J. , 217, 464.Google Scholar
Blitz, L., 1978, Ph.D. Dissertation, Columbia University.Google Scholar
Blitz, L. Bazell, D., and Désert, F.X., 1990, Ap. J. (Letters) , 352, L13.CrossRefGoogle Scholar
Clemens, D.P., 1985, Ap. J. , 295, 402.CrossRefGoogle Scholar
Clemens, D.P., Sanders, D.B., and Scoville, N.Z., 1987, Ap. J. , 327, 139.CrossRefGoogle Scholar
Dame, T.M., Elmegreen, B.G., Cohen, R.S., and Thaddeus, P., 1986, Ap. J. , 305, 892.Google Scholar
Dame, T.M. et al, 1987, Ap. J. , 322, 706.CrossRefGoogle Scholar
Désert, F.X., Bazell, D., and Boulanger, , 1988, Ap. J. , 334, 815.Google Scholar
Désert, F.X., Bazell, D., and Blitz, L., 1990, Ap. J. (Letters) , 355, L51.CrossRefGoogle Scholar
Falgarone, E., and Lequeux, J., 1973 Astron. Ap. , 25, 253.Google Scholar
Fich, M. and Blitz, L., 1984, Ap. J. , 279, 125.Google Scholar
Georigk, W., and Mebold, U., 1986, Astr. Ap , 162, 279.Google Scholar
Georigk, W., Mebold, U., Reif, K., Kalberla, P.M.W., and Velden, L., 1983, Astr. Ap , 120, 63.Google Scholar
Heiles, C., Reach, W.T., and Koo, B.-C., 1988, Ap. J. , 322, 313.CrossRefGoogle Scholar
Hobbs, L.M., Blitz, L. and Magnani, , 1986, Ap. J. (Letters) , 306, L109.Google Scholar
Hobbs, L.M., Blitz, L., Penprase, B.E., Magnani, L., and Welty, D.E., 1988, Ap. J. , 327, 356.Google Scholar
Knapp, G.R., 1987, Pub. A.S.P. , 99, 1134.Google Scholar
Leisawitz, D., 1988, NASA Reference Publication 1202, Catalog of Open Clusters and Associated Interstellar Matter. Google Scholar
Leisawitz, D., Bash, F.N., and Thaddeus, P., 1989, Ap. J. Suppl. , 70, 731.CrossRefGoogle 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
Mebold, U., Cernicharo, J., Velden, L., Reif, K., Crezelius, C., and Georigk, W., 1985, Astr. Ap, , 151, 427.Google Scholar
Nyman, L.-Å., Thaddeus, P., Bronfman, R.S., and Cohen, R.S., 1987, Ap. J. , 314, 374.CrossRefGoogle Scholar
Odenwald, S.F., 1988, Ap. J. , 325, 320.CrossRefGoogle Scholar
Odenwald, S.F., and Rickard, L. J., 1987, Ap. J. , 318, 703.Google Scholar
Rohlfs, R., Herbstmeier, U., Mebold, U., and Winnberg, A., 1989, Astr. Ap , 211, 402.Google Scholar
Scoville, N.Z., Yun, M.S., Clemens, D.P., Sanders, D.B., and Waller, W.H., 1987, Ap. J. Suppl. , 63, 821.Google Scholar
Solomon, P.M., and Sanders, D.B., 1980, in Giant Molecular Clouds in the Galaxy , Solomon, P.M., and Edmunds, M.G., eds., Pergamon: Oxford, p.41.Google Scholar
Verschuur, G.L., 1971, Astron. J. , 76, 317.Google Scholar
Welty, D.E., Hobbs, L.M., Blitz, L., and Penprase, B.E., 1989, Ap. J. , 346, 232.Google Scholar
Wouterloot, J.G.A., Brand, J., Burton, W.B., Kwee, K.K., 1990, Astr. Ap , 230, 21.Google Scholar