The forbidden S II electron density distribution over the planetary nebula NGC 7009

Details The forbidden S II electron density distribution over the planetary nebula NGC 7009 The forbidden S II electron density distribution over the planetary nebula NGC 7009

Aug 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ap%26ss..78..473m&link_type=abstract

Astrophysics and Space Science, vol. 78, no. 2, Aug. 1981, p. 473-481.

Astronomy and Astrophysics

Astrophysics

1

Astronomical Spectroscopy, Density Distribution, Electron Density (Concentration), Forbidden Bands, Line Spectra, Planetary Nebulae, Optical Measuring Instruments, Radial Distribution, Stellar Winds, Sulfur

Scientific paper

Electron densities have been measured from [S ii] 6716/6731 A line ratios for a grid of points over the surface of the planetary nebula NGC 7009 using a photon counting detector. The radial dependence of the electron density has been modelled, and the relationship provides possible evidence that the planetary nebula shell is driven by a strong stellar wind

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