Astronomy and Astrophysics – Astronomy
Scientific paper
May 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.199..517h&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 199, May 1982, p. 517-564. Research supported by the Science Research C
Astronomy and Astrophysics
Astronomy
164
Astronomical Models, Astronomical Spectroscopy, Planetary Nebulae, Ultraviolet Spectra, Abundance, Brightness Distribution, Data Reduction, Gas Ionization, H Lines, Iue, Lyman Alpha Radiation, Radiative Transfer, Stellar Radiation
Scientific paper
The planetary nebula NGC 7662 considered in the present investigation has been a popular object for detailed modelling. Two models are considered. In Model I, which is similar to a model considered by Harrington et al. (1979), dust absorption is neglected. The model cannot provide results which are in agreement with two types of observational data. It is believed that Model II gives a better description of NGC 7662. Observations are considered along with aspects of data extraction and reduction, absolute flux measurements, the accuracy of the measurements made with the aid of the International Ultraviolet Explorer (IUE) spacecraft, and the continuum fluxes. The temperature of the central star is discussed, taking into account Zanstra temperatures, and the color temperature from IUE observations. Attention is also given to adopted fluxes in nebular lines, the computer program for models of planetary nebulae, and model results.
Adams Stefan
Harrington Patrick J.
Lutz Jack H.
Seaton M. J.
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