Interpretation of the [ClIII] Lines in Gaseous Nebulae

  1. L. H. Aller,
  2. S. J. Czyzak,
  3. M. F. Walker, and
  4. T. K. Krueger
  1. UNIVERSITY OF CALIFORNIA (LOS ANGELES)
  2. OHIO STATE UNIVERSITY, COLUMBUS
  3. UNIVERSITY OF CALIFORNIA (SANTA CRUZ)
  4. WRIGHT-PATTERSON AIR FORCE BASE, FAIRBORN, OHIO

Abstract

The intensity ratio of the green λλ5517 and 5537 lines of [ClIII] serves as an indicatrix of the electron density in many gaseous nebulae whose spectra can be observed with an image converter. Quantitative interpretation of the line ratio requires accurate values of the collisional strengths and transition probabilities. With improved values of these parameters we have revised electron densities for a number of nebulae; the results seem to be in good accord with those derived from other criteria.

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  1. PNAS May 1, 1970 vol. 66 no. 1 1-5
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