Other
Scientific paper
Oct 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apjs...38...89n&link_type=abstract
Astrophysical Journal Supplement Series, vol. 38, Oct. 1978, p. 89-117.
Other
9
Electron Density (Concentration), Electron Energy, Novae, Stellar Spectra, Collision Rates, Electron Scattering, Emission Spectra, Forbidden Bands, Hydrogen Clouds, Light Curve, Nebulae, Stellar Models, Stellar Spectrophotometry
Scientific paper
Twenty-two absolute flux distributions in the spectral range 3150-6000 A of the nova were compared with the emission spectrum of a pure hydrogen plasma. The electron temperature and E(B - V) were found to be 16,000 + or - 2000 K and 0.15 + or - 0.10 mag, respectively. A distance of 1.6 + or - 0.2 kpc and the model by Ennis et al. (1977) were adopted for the radius and volume of the nova shell as a function of time. The temporal variations in electron density, electron temperature, collision rates, and mass of the shell were determined during the first 90 days after outburst. The Ennis model for the radius and volume of the shell can be used to obtain good fits to the light curve and the continuous and emission-line spectrum of hydrogen. It cannot be used to predict the forbidden-line strengths, and there were other inconsistencies between the observations and the model. Therefore, it is concluded that density variations of at least two orders of magnitude existed in the shell and that the electron densities, collision rates, and mass of the shell are upper limits.
Ketelsen Dean A.
Neff John S.
Smith Verne V.
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