Extended forbidden O II emission around IC 418 and RX Puppis

Details Extended forbidden O II emission around IC 418 and RX Puppis Extended forbidden O II emission around IC 418 and RX Puppis

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.242..457m&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 242, Feb. 1, 1990, p. 457-470.

Astronomy and Astrophysics

Astronomy

13

Emission Spectra, Oxygen Spectra, Planetary Nebulae, Stellar Spectrophotometry, Symbiotic Stars, Brightness Distribution, H Alpha Line, Ionized Gases, Stellar Luminosity, Visible Spectrum

Scientific paper

Optical spectra of the planetary nebular IC 418 and RX Puppis are presented. Emission in the forbidden O II 3726, 3729 A doublet was found out to angular distances of 180 arcsecs from the center of IC 418. The atmospheric scattering of the central spectrum of IC 418 is shown to dominate out to 50 arcsec, while diffuse galactic emission from low-density ionized gas dominates beyond 100 arcsecs. The spectra of RX Pup show that atmospheric scattering of the emission-line spectrum and ambient diffuse galactic emission contribute to the extended forbidden O II emission. The relative line intensities in the central object spectra of the two sources are analyzed.

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