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II. The Galaxy

Spiral structure

Published online by Cambridge University Press:  14 August 2015

H. F. Weaver

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Investigations of the structural form of the Galaxy are being actively carried on at a number of observatories. The portion of the Galaxy surveyed has been markedly increased since the time of the first Symposium for Coordination of Galactic Research. Many new results have been obtained, particularly in the southern hemisphere; additional observing programs are in the planning stage. New observational techniques for some problems have been found and are under investigation.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 7: Second Conference on co-ordination of Galactic Research , 1959 , pp. 40 - 65
Copyright
Copyright © Cambridge University Press 1959 

References

[1] I.A.U. Symposium No. 4, Radio Astronomy, edited by van de Hulst, H. C., Cambridge University Press, 1957; see also Bull. Astr. Inst. Netherl. 13, no. 457, 1957.Google Scholar
[2] See Ollongren, A. and van de Hulst, H. C. Bull. Astr. Inst. Netherl. 13, 196, 1957; Westerhout, G. Bull. Astr. Inst. Netherl. 13, 201, 1957; Schmidt, M. Bull. Astr. Inst. Netherl. 13, 247, 1957.Google Scholar
[3] Blaauw, A. Bull. Astr. Inst. Netherl. 11, 459, 1952.Google Scholar
[4] See van de Hulst, H. C. I.A.U. Symposium No. 4, p. 5, 1957.CrossRefGoogle Scholar
[5] Communicated by Kerr, F. J. Google Scholar
[6] Kwee, K., Muller, C. A. and Westerhout, G. Bull. Astr. Inst. Netherl. 12, 211, 1954.Google Scholar
[7] Schmidt, M. Bull. Astr. Inst. Netherl. 13, 15, 1956.Google Scholar
[8] See the diagram by Schmidt, M. Bull. Astr. Inst. Netherl. 13, 247, 1957.Google Scholar
[9] Kerr, F. J., Hindman, J. V. and Carpenter, Marther Stahr. Nature, in press.Google Scholar
[10] Lindblad, B. Stockholms Obs. Ann. 19, no. 9, 1957.Google Scholar
[11] Weaver, H. F. Smithsonian Cont. to Astrophysics, 1, 151, 1956.Google Scholar
[12] Kerr, F. J., Hindman, J. V. and Carpenter, Martha Stahr. Nature, in press.Google Scholar
[13] Kerr, F.J. Astron. J. 62, 93, 1957; also found by Burke, B. F. Astron. J. 62, 90, 1957, and by Westerhout, G. Bull. Astr. Inst. Netherl. 13, 201, 1957 (Fig. 7).Google Scholar
[14] Schwarschild, M. A.J. 59, 273. 1954.CrossRefGoogle Scholar
[15] Westerhout, G. Bull. Astr. Inst. Netherl. 13, 201, 1957.Google Scholar
[16] van Tulder, J. J. M. Bull. Astr. Inst. Netherl. 9, 315, 1942.Google Scholar
[17] See the report on p. 39 in this volume; also an account given in I.A.U. Symposium No. 1. Co-ordination of Galactic Research, edited by Blaauw, A., Cambridge University Press, 1955; Nassau, J.J. and Blanco, V. M. Astroph. J. 120, 118, 465, 1954; Nassau, J. J., Blanco, V. M. and Cameron, D. M. Astroph. J. 124, 522, 1956.Google Scholar
[18] For more extended surveys of specific topics see I.A.U. Symposium No. 4.Google Scholar
[19] Piddington, J. H. and Trent, G. H. Aust. J. of Phys. 9, 481, 1956.Google Scholar
[20] Westerhout, G. I.A.U. Symposium No. 4, p. 22; discussion of remarks by R. Hanbury Brown, I.A.U. Symposium No. 4, p. 216, 1957.Google Scholar
[21] Unpublished material supplied by Houck, T. E. Google Scholar
[22] Morgan, W. W., Strömgren, B. and Johnson, H. M. Astroph. J. 121, 611, 1955; Abt, H. A., Morgan, W. W. and Strömgren, B. Astroph. J. 126, 322, 1957.Google Scholar
[23] Courtès, G. Mem. Soc. R. Sc. Liège, 4e serie, 15, 453, 1954.Google Scholar
[24] Becker, W. Astroph. J. 107, 278, 1948; Johnson, H. L. and Morgan, W. W. Astroph. J. 117, 313, 1953.CrossRefGoogle Scholar
[25] Morgan, W. W., Meinel, A. B. and Johnson, H. M. Astroph. J. 120, 506, 1954; Schulte, D. H., Astroph. J. 123, 250, 1956.Google Scholar
[26] Cape Mimeograms, no. 2, no. 3, 1953.Google Scholar
[27] Shapley, H. Proc. Nat. Acad. Sci. 26, 541, 1940.Google Scholar
[28] Blaauw, A. and Morgan, H. R. Bull. Astr. Inst. Netherl. 12, 95, 1954; Weaver, H. F. Astron. J. 59, 375, 1957.Google Scholar
[29] Code, A. D. Astroph. J. 106, 309, 1947.CrossRefGoogle Scholar
[30] Feast, W. M. Mon. Not. R. Astr. Soc. 116, 583, 1956.CrossRefGoogle Scholar
[31] A large number of values were considered: Stoy, R. H. Vistas in Astronomy, vol. 2, 1956, Pergamon Press, London, p. 1099; Greenstein, J. L. and Henyey, L. G. Astroph. J. 93, 327, 1941; Stebbins, J. Observatory, 70, 206, 1950; Morgan, W. W., Harris, D. L. and Johnson, H. L. Astroph. J. 118, 92, 1953; Hiltner, W. A. and Johnson, H. L. Astroph. J. 124, 375, 1956; Blanco, V. M: Astroph. J. 123, 64, 1956.Google Scholar
[32] Joy, A. H. Astroph. J. 86, 363, 1937; Stibbs, D. W. N. Mon. Not. R. Astr. Soc. 115, 363, 1955.Google Scholar
[33] Morgan, W. W., Whitford, A. E. and Code, A. D. Astroph. J. 118, 318, 1953.Google Scholar
[34] Eggen, O. J., Gascoigne, S. C. B. and Burr, E. J., to be published in Mon. Not. R. Astr. Soc. Google Scholar
[35] Stibbs, D. W. N. Mon. Not. R. Astr. Soc. 115, 323, 1955.Google Scholar
[36] Unpublished observations by Schmidt, T. of Göttingen.Google Scholar
[37] Kraft, R. P. Astroph. J. 126, 225, 1957.Google Scholar
[38] van den Bergh, S. Astroph. J. 126, 323, 1957.CrossRefGoogle Scholar
[39] Eggen, O.J. Astroph. J. 113, 367, 1951.CrossRefGoogle Scholar
[40] Irwin, J. B., unpublished.Google Scholar
[41] Joy, A. H. Astroph. J. 86, 363, 1937.Google Scholar
[42] Stibbs, D. W. N. Mon. Not. R. Astr. Soc. 115, 363, 1955.Google Scholar
[43] Wilson, O. C. and Bappu, M. K. Vainu. Astroph. J. 125, 661, 1957.Google Scholar
[44] Wilson, O. C. Proc. N.S.F. Conference on Stellar Atmospheres, edited by Wrubel, M. H., 1954.Google Scholar
[45] Kapteyn, J. C. Plan of Selected Areas (1906). Reprinted 1923, Hoitsema Brothers, Groningen.Google Scholar
[46] Parenago, P. P. Astr. J. U.S.S.R. 33, 749, 1956.Google Scholar
[47] Parenago, P. P. Astr. J. U.S.S.R. 22, 129, 1945.Google Scholar
[48] Nassau, J. J. and Blanco, V. M. Astroph. J. 120, 118, 464, 1954; Nassau, J. J., Blanco, V. M. and Cameron, D. M. Astroph. J. 124, 522, 1956.Google Scholar