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A Comparison of Radio-Frequency and Optical Studies of Selected Planetary Nebulae

Published online by Cambridge University Press:  25 April 2016

L. H. Aller
L. H. Aller*
Affiliation:
University of California, Los Angeles
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Extract

The thermal radio-frequency emission, Ev , per unit volume per unit frequency interval may be computed (e.g. from equations given by Oster) and compared with the volume emissivity E(Hβ) in the optical Hβ transition.

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Type
Contributions
Information
Publications of the Astronomical Society of Australia , Volume 1 , Issue 6 , September 1969 , pp. 283 - 285
Copyright
Copyright © Astronomical Society of Australia 1969

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References

1 Oster, L., Ap. J., 134, 1010 (1961).Google Scholar
2 Aller, L. H., ‘Gaseous Nebulae’, Chapman & Hall, London 1956; Seaton, M. J., Reports, Progess in Physics, 23, 313 (1960); Aller, L. H., and Liller, W., ‘Nebulae & Interstellar Matter’, Chap. 9, ed. Middlehurst, Barbara & Aller, L. H., University of Chicago Press, Chicago 1968.Google Scholar
3 Clarke, Wm., Thesis, Univ. of California, Los Angeles, 1965, cf. p. 521 of ‘Nebulae & Interstellar Matter’, op. cit.Google Scholar
4 Menzel, D. H. and Baker, J. G., Ap. J., 86, 70 (1937); 88, 52 (1938).Google Scholar
5 O’Dell, C. R., Ap. J., 138, 67, 293, 1018 (1963).Google Scholar
6 Terzian, Y., I.A.U. symposium No. 34, ‘Planetary Nebulae’, ed. Osterbrock, D. and O’Dell, C. R., Reidel, Dordrecht-Holland 1968.Google Scholar
7 See Kaler, J. B., Ap. J., 143, 722 (1966) and also series of papers entitled ‘Spectrophotometry Studies of Gaseous Nebulae’, ed. Czyzak, S. J., Kaler, J. B., Aller, L. H. and others in Ap. J.Google Scholar
8 Johnson, H. L., Chap. 5, ‘Nebulae & Interstellar Matter’, 1968, op. cit.Google Scholar