The reddening and near-infrared spectrum of NGC 7027

Details The reddening and near-infrared spectrum of NGC 7027 The reddening and near-infrared spectrum of NGC 7027

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pasp...93..191c&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 93, Apr.-May 1981, p. 191-201. Research supported by the Natural Science

Astronomy and Astrophysics

Astronomy

18

Astronomical Spectroscopy, Infrared Spectra, Interstellar Extinction, Near Infrared Radiation, Planetary Nebulae, Red Shift, Cosmic Dust, Electron Density (Concentration), Electron Energy, Emission Spectra, Line Spectra, Lyman Spectra

Scientific paper

NGC 7027 is a planetary nebula which contains a considerable quantity of dust that affects its optical appearance. In the considered investigation, two-dimensional observations are used to study the variation in reddening by dust across the face of the nebula. Spectroscopic data are used to investigate the physical conditions and compare the observed relative line ratios with the predictions of Shields (1978) and Pequignot et al. (1978). Both the spectroscopic and two-dimensional in-focus observations were made with diode array systems. The observations were made at the Cassegrain focus of a 2.2-m and a 1.8-m telescope. A 1.2-m telescope was also employed.

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