Dec 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984msngr..38...13b&link_type=abstract
ESO Messenger (ISSN 0722-6691), Dec. 1984, p. 13-16.
Physics
4
Abundance, Cosmic Gases, Emission Spectra, Gas Ionization, Line Spectra, Spiral Galaxies, Diagrams, Ion Production Rates, Molecular Excitation, Optical Thickness, Photoionization, Stellar Evolution
Scientific paper
Low Ionization Nuclear Emission Regions (LINERs) are noted to have an excitation mechanism whose nature has yet to be satisfactorily determined. A research program is underway for LINERs, and two types of results are already available: new diagrams of emission line ratios, which reveal tighter correlations when homogeneous data are used, and a new grid of photoionization calculations, which aim at analyzing the sensitivity to such input parameters as optical thickness, ionizing spectrum hardness, and gas distribution. It is concluded that abundances are more uniform, and solar, than previous work has suggested.
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