Spectrophotometry of the shell around AG Carinae

Details Spectrophotometry of the shell around AG Carinae Spectrophotometry of the shell around AG Carinae

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.242...98m&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 242, Jan. 1, 1990, p. 98-108.

Other

32

B Stars, Stellar Envelopes, Stellar Spectrophotometry, Supergiant Stars, Variable Stars, Emission Spectra, H Ii Regions, Interstellar Extinction, Planetary Nebulae, Stellar Magnitude, Stellar Mass Ejection

Scientific paper

Spatially-resolved long-slit spectrophotometry are presented for two regions of the shell nebula around the P-Cygni variable star AG Carinae. The spectra cover the 3700-6800 A wavelength range. Emission-line diagnostics are used to derive extinction, electron temperatures, and densities for various positions in the nebula. The chemical abundances and ionization structure are calculated and compared with other types of planetary nebulae and shells around other luminous stars. It is found that the N/O and N/S ratios of Ag Car are high compared to solar neighborhood ISM values. The O/H depletion found for the AG Car shell approaches that found in the condensations of the Eta Car system.

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