Open AccessInterpretation of the [ClIII] Lines in Gaseous Nebulae
Author(s) -
L. H. Aller,
S. J. Czyzak,
Merle F. Walker,
T. K. Krueger
Publication year - 1970
Publication title -
proceedings of the national academy of sciences of the united states of america
Language(s) - English
Resource type - Journals
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.66.1.1
Subject(s) - interpretation (philosophy) , line (geometry) , spectral line , electron , physics , atomic physics , electron density , chemistry , nuclear physics , astronomy , philosophy , mathematics , geometry , linguistics
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.