The Nebulium Spectrum in New Stars

Details The Nebulium Spectrum in New Stars The Nebulium Spectrum in New Stars

Mar 1928

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1928natur.121..453e&link_type=abstract

Nature, Volume 121, Issue 3047, pp. 453 (1928).

Physics

Scientific paper

IN NATURE of Jan. 28, p. 136, Mr. S. R. Pike makes an objection to the density which I have found, by the `expanding shell' theory for novæ, to be necessary for the production of the nebulium spectrum. Mr. Pike applies the formulæ of the theory of thermal ionisation and finds that it is inconsistent to have the spectra of hydrogen and nebulium present at the determined density and both existing under the same temperature. For coexistence of these substances, defined as 0.1 per cent. H atoms and 0.1 per cent. O++ atoms, he finds that a density of about 10-7 gm./c.c. is necessary, as against the density of about 10-17 gm./c.c. given by me.

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