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On the physical conditions in interstellar H I gas

Published online by Cambridge University Press:  14 August 2015

M. Grewing ,
U. Mebold  and
K. Rohlfs
M. Grewing
Affiliation:
Max Planck-Institut für Radioastronomie und Institut für Astrophysik, Bonn, Germany
U. Mebold
Affiliation:
Max Planck-Institut für Radioastronomie und Institut für Astrophysik, Bonn, Germany
K. Rohlfs
Affiliation:
Max Planck-Institut für Radioastronomie und Institut für Astrophysik, Bonn, Germany

Abstract

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Weighted average values of the ionization ratio ne/nH for the interstellar gas can be obtained from a comparison of pulsar data and 21-cm emission measurements. For high latitude pulsars this procedure is straight forward and reasonably free from assumptions. The resulting ionization ratios are high (ne/nH = 0.39). If this is compared with values as given by the theory of ionization and heating of interstellar gas by subcosmic rays, temperatures for the ‘neutral’ gas above 104 K are obtained. For low latitude pulsars this procedure depends to a much larger extend on the assumed distance of the objects and on the ionization theory. Here the values found are ne/nH = 0.07 and Te = 2000 K.

Type
Part II/Observations of Spiral Structure in Our Galaxy
Information
Symposium - International Astronomical Union , Volume 38: The Spiral Structure of our Galaxy , 1970 , pp. 182 - 185
Copyright
Copyright © Reidel 1970 

References

Clark, B. G.: 1965, Astrophys. J. 142, 1398.Google Scholar
Field, G. C., Goldsmith, D. W., and Habing, H. J.: 1969, Astrophys. J. 155, L149.Google Scholar
Gordon, C. P., Gordon, K. J., and Shalloway, A. M.: 1969, Nature 222, 129 Google Scholar
Hewish, A., Bell, S. J., Pilkington, J. D. H., Scott, P. F., and Collins, R. A.: 1968, Nature 217, 709.Google Scholar
Hjellming, R. M., Gordon, C. P., and Gordon, K. J.: 1969, Astron. Astrophys. 2, 202.Google Scholar
Mebold, U.: 1969, Beiträge zur Radioastronomie 1, 97.Google Scholar
Pikel'ner, S. B.: 1968, Soviet Astron. 11, 737.Google Scholar
Rohlfs, K., Mebold, U., and Grewing, M.: 1969, Astron. Astrophys. 3, 347.Google Scholar
Silk, J. and Werner, M. W.: 1969, Astrophys. J. 158, 185.Google Scholar
Spitzer, L. and Tomasko, M. G.: 1968, Astrophys. J. 152, 971.CrossRefGoogle Scholar