Note on the widths of radio spectral lines from planetary nebulae

Details Note on the widths of radio spectral lines from planetary nebulae Note on the widths of radio spectral lines from planetary nebulae

Dec 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974jrasc..68..295h&link_type=abstract

Journal of the Royal Astronomical Society of Canada, vol. 68, Dec. 1974, p. 295-300.

Astronomy and Astrophysics

Astronomy

2

Astronomical Models, Line Spectra, Planetary Nebulae, Radiative Recombination, Radio Spectra, Spectral Line Width, Curve Fitting, Doppler Effect, Galactic Radiation, Line Shape, Optical Thickness, Radio Astronomy

Scientific paper

The profile of a recombination line emitted by a model planetary nebula, represented as an unresolved, expanding, optically-thin shell source has been calculated. Curves giving the half-width of the profile in terms of the thermal Doppler width and the expansion velocity are presented for two simple expansion models. Since in radio astronomy Gaussian profiles are sometimes fitted to observed spectral data, curves of the corresponding widths of best-fitting Gaussians are also given.

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