The galactic distribution of molecules (A CO survey)

  • N. Z. Scoville
Part V: Large-Scale Distribution of H II Regions
Part of the Lecture Notes in Physics book series (LNP, volume 42)


The J = 1 → 0 emission of CO has been surveyed in the galactic plane between ℓ = -10° and +90° with a 1′ beam sampling every degree. Molecular clouds emitting in the CO line are plentiful over the inner region of the galaxy. Their greatest number occurs in the galactic nucleus and at a radius of 5.5 kpc — a distribution similar to radio H II regions but very different from that previously derived for atomic hydrogen. The total mass in molecular clouds is found to be 1 → 3 109 M, and each typically has 105 M, an average density of 500 cm−3, and a temperature of 7°K. These results suggest that most of the interstellar medium in the interior of the galaxy is molecular H2.


Radial Velocity Molecular Cloud Galactic Center Galactic Plane Galactic Rotation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. Davis, J.H. and Vanden Bout, P. 1973, Ap. Lett., 15, 42.Google Scholar
  2. Goldreich, P. and Kwan, J. 1974, Ap. J., 189, 441.Google Scholar
  3. Herbig, G.H. 1962, Adv. Astrm. Astrophys., 1, 47.Google Scholar
  4. Kerr, F.J. 1969, Aust. J. Phys. (Astrophysical Supplement), 9, 1.Google Scholar
  5. Lizst, H. 1973, unpublished Ph.D. thesis Princeton University.Google Scholar
  6. Mezger, P.G. 1970, I.A.U. Symposium, 38, 107.Google Scholar
  7. Mezger, P.G., Wilson, T.L., Gardner, F.F., and Milne, D.K. 1970, Astrm. and Astrophys., 4, 96.Google Scholar
  8. Penzias, A.A., Jefferts, K.B., and Wilson, R.W., 1971, AP.J., 165, 229.Google Scholar
  9. Rougoor, G.W. 1964, B.A.N., 17, 381.Google Scholar
  10. Rougoor, G.W. and Oort, J.H. 1960, Proc. Natl. Acad. Sci. U.S.A., 46, l.Google Scholar
  11. Schmidt, M. 1965, tStars and Stellar Systems (University of Chicago Press), 5, 513.Google Scholar
  12. Scoville, N.Z. and Solomon, P.M. 1974, Ap.J. (Letters), 187, L67.Google Scholar
  13. Scoville, N.Z., Solomon, P.M., and Jefferts, K.B. 1974, Ap.J. (Letters), 187, L63.Google Scholar
  14. Scoville, N.Z. and Solomon, P.M. 1975 (in preparation).Google Scholar
  15. Spitzer, L., Drake, J.F., Jenkins, E.B., Morton, D.C., Rogerson, J.B., and York, D.G. 1973, Ap. J., 181, L116.Google Scholar
  16. Tucker, K.D., Kutner, M.L., and Thaddeus, P. 1973, Ap.J. (Letters), 186, L13.Google Scholar
  17. Van Woerden, H. 1965, Trans. I.A.U., 12A, 789.Google Scholar
  18. Wannier, P.G. 1975 unpublished Ph.D. thesis Princton University.Google Scholar
  19. Westerhout, G. 1958, B.A.N., 14, 215.Google Scholar

Copyright information

© Springer-Verlag 1975

Authors and Affiliations

  • N. Z. Scoville
    • 1
  1. 1.Owens Valley Radio ObservatoryCalifornia Institute of TechnologyCalifornia

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