Abstract
Observations of the large-scale distribution of molecular clouds in external galaxies offer a unique opportunity for investigating galactic evolution. New generations of stars form in these dense regions, and the most massive of these stars recycle their processed interiors into the interstellar medium. Early observations of the CO distribution in the Milky Way (Scoville and Solomon 1975; Burton and Gordon 1976) indicated that there is intense emission at the center of our Galaxy, very little gas between 1 and 4 kpc radius, and a “molecular ring” feature between 4 and 8 kpc. Observations of molecular clouds in external galaxies of a variety of Hubble types and luminosities will enable us to more clearly understand the origin of this distribution. Although no other galaxies are observed to contain CO distributions precisely like that in the Milky Way, the differences which are present provide important clues to the structure and evolution of galaxies.
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References
Brady, E., and Young, J.S.: 1982, B.A.A.S., 14, 661
Burton, W.B., and Gordon, M.A.: 1976, Ap. J. (Letters), 207, L189
Elmegreen, B.G., Elmegreen, D.M., and Morris, M.: 1980, Ap. J., 240, 455
Rickard, L.J., Palmer, P., Morris, M., Turner, B.E., and Zuckerman, B.: 1977, Ap. J., 213, 673
Rogstad, D.H., and Shostak, G.S.: 1972, Ap. J., 176, 315
Scoville, N.Z., and Solomon, P.M.: 1975, Ap. J. (Letters), 199, L105
Scoville, N.Z., and Young, J.S.: 1983, Ap. J., 265, 148
Stark, A.A.: 1982, in Proceedings of Workshop on Extragalactic Molecules, ed. Blitz and Kutner, p. 77
Young, J.S., and Scoville, N.Z.: 1982a, Ap. J., 258, 467
Young, J.S., and Scoville, N.Z.: 1982b, Ap. J. (Letters), 260, L41
Young, J.S., and Scoville, N.Z.: 1982c, Ap. J. (Letters), 260, L11
Young, J.S., Tacconi, L., and Scoville, N.Z.: 1983, Ap. J., 269, 136
Reference to Discussion
Smith, H.E.: 1975, Astrophys. J. 199, 591
Solomon, P.M., Barrett, J., Sanders, D.B., de Zafra, R.: 1983, Astrophys. J. (Letters) 266, L103
Morris, M. and Rickard, L. J: 1982, Ann. Rev. Astron. Astrophys. 20, 517
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© 1985 IAU
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Young, J.S. (1985). Molecular Clouds in External Galaxies. In: Van Woerden, H., Allen, R.J., Burton, W.B. (eds) The Milky Way Galaxy. International Astronomical Union, vol 106. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-5291-1_34
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DOI: https://doi.org/10.1007/978-94-009-5291-1_34
Publisher Name: Springer, Dordrecht
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