Abundances of refractory elements in quasars

Details Abundances of refractory elements in quasars Abundances of refractory elements in quasars

Oct 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...249..443g&link_type=abstract

Astrophysical Journal, Part 1, vol. 249, Oct. 15, 1981, p. 443-448.

Astronomy and Astrophysics

Astrophysics

56

Abundance, Astronomical Models, Quasars, Refractory Materials, Galactic Nuclei, Interstellar Matter, Line Spectra, Luminosity, Planetary Nebulae, Spectrum Analysis

Scientific paper

A comparison of previous and new observations of iron, silicon, aluminum, magnesium and carbon lines in quasars with theoretical models shows that the gas-phase abundances of these refractory elements cannot be much less than solar, and that they do not show the order-of-magnitude depletions that are found in planetary nebulae and the interstellar medium. In light of this lack of refractory element depletions, it is suggested that the broad emission-line clouds must be devoid of dust.

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