Hostname: page-component-cd9895bd7-hc48f Total loading time: 0 Render date: 2025-01-06T03:00:43.471Z Has data issue: false hasContentIssue false
  • English
  • Français

Substructure within galactic spiral arms as derived from studies at 21 cm

Published online by Cambridge University Press:  14 August 2015

R. D. Davies
R. D. Davies*
Affiliation:
Jodrell Bank Experimental Station, University of Manchester, England

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Detailed structure within the spiral arms of our Galaxy is suggested by hydrogen-line spectra taken with high resolution in frequency [1]. The spectra show much detail in each maximum (spiral arm). It is not clear, however, if this frequency structure refers to fine structure in depth or in velocity dispersion or in both. Fine structure in position and depth has been inferred from 21-cm drift curves taken across the nearby spiral arms. The results of three investigations will be discussed. Two have been published in some detail [2, 3] and will only be summarized here.

Type
Part III: Galactic and Extragalactic Radio Sources
Information
Symposium - International Astronomical Union , Volume 9: Paris Symposium on Radio Astronomy , 1959 , pp. 355 - 359
Copyright
Copyright © Stanford University Press 1959 

References

1. Matthews, T. A. Radio Astronomy (I.A.U. Symposium No. 4, 1955). Cambridge, England, 1957, p. 48.Google Scholar
2. Davies, R. D. M.N.R.A.S. 116, 443, 1956.CrossRefGoogle Scholar
3. Davies, R. D. M.N.R.A.S. 117, 663, 1957.CrossRefGoogle Scholar
4. Pannekoek, A. Publ. Astron. Inst. Univ. Amsterdam , No. 3, 1933.Google Scholar
5. Franklin, F. A. A.J. 60, 351, 1955.CrossRefGoogle Scholar
6. Heeschen, D. Ap. J. 121, 569, 1955.CrossRefGoogle Scholar
7. Lilley, A. E. Ap. J. 121, 559, 1955.CrossRefGoogle Scholar
8. Spitzer, L. Ap. J. 107, 6, 1948.CrossRefGoogle Scholar
9. Kahn, F. D. Gas Dynamics of Cosmic Clouds. New York (Interscience Publishers, Inc.), 1955, p. 273.Google Scholar
10. Schmidt, H. Veröff. Sternw. Bonn. No. 35, 1949.Google Scholar
11. Muller, C. A., and Westerhout, G. B.A.N. 13, 151, 1957.Google Scholar
12. Lundmark, K. Medd. Astr. Obs. Uppsala , No. 30, 1927.Google Scholar