Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-26T03:34:19.164Z Has data issue: false hasContentIssue false
  • English
  • Français

On the Stability of Ionization Fronts

Published online by Cambridge University Press:  03 August 2017

F. D. Kahn
F. D. Kahn*
Affiliation:
Department of Astronomy, Manchester University, 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.

The boundaries between HII and HI regions often have shapes which suggest that the motion of the interstellar gas is unstable there. A characteristic shape of this kind is the so-called “elephant's trunk,” a long tongue of dark material (presumably an HI region) seen superimposed on the luminous HII region, and outlined by a thin rim brighter than the luminous background. A detailed study of these shapes has recently been made by Pottasch; earlier observations had been made by Duncan and by Struve.

Type
Part VI: Conditions at the Ionization and Shock Fronts in Collisions of Gas Clouds
Information
Symposium - International Astronomical Union , Volume 8: Cosmical Gas Dynamics , July 1958 , pp. 1058 - 1061
Copyright
Copyright © American Physical Society 1958 

References

1 Pottasch, S., Bull. Astron. Soc. Neth. 13, 77 (No. 471) (1956).Google Scholar

2 Duncan, J., Astrophys. J. 51, 4 (1920).Google Scholar

3 Struve, O., Astrophys. J. 85, 208 (1937).Google Scholar

4 van de Hulst, H. C., Gas Dynamics of Cosmic Clouds , edited by van de Hulst, H. C. and Burgers, J. M. (North-Holland Publishing Company, Amsterdam, the Netherlands, 1955), Chap. 19.Google Scholar

5 Frieman, E. A., Astrophys. J. 120, 18 (1954).Google Scholar

6 Oort, J. H. and Spitzer, L., Astrophys. J. 121, 6 (1955).CrossRefGoogle Scholar

7 Kahn, F. D., Bull. Astron. Soc. Neth. 12, 187 (No. 456) (1954).Google Scholar

8 Strömgren, B., Astrophys. J. 89, 526 (1939).CrossRefGoogle Scholar

9 Goldsworthy, F. A., Communication to this Symposium (1957).Google Scholar

10 Spitzer, L., Astrophys. J. 120, 1 (1954).CrossRefGoogle Scholar

11 Allen, C. W., Astrophysical Quantities (The Athlone Press, London, 1955), p. 89.Google Scholar

12 Pack, D. C., Monthly Notices Roy. Astron. Soc. 113, 43 (1953).Google Scholar

13 Münch, G., Communication to this Symposium (1957).Google Scholar