Limits on heavy element abundances in QSO Ly-alpha absorption systems

Details Limits on heavy element abundances in QSO Ly-alpha absorption systems Limits on heavy element abundances in QSO Ly-alpha absorption systems

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.237..635w&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 237, April 1, 1989, p. 635-652. Research supported by M

Astronomy and Astrophysics

Astronomy

31

Absorption Spectra, Abundance, Heavy Elements, Lyman Spectra, Quasars, Lyman Alpha Radiation, Red Shift

Scientific paper

Intermediate-resolution spectra of the QSOs MCS402, Q0347-383, Q0420-388, and Q2204-408 have been combined to yield average spectra of Ly-alpha absorption systems with improved S/N ratios. Searches for absorption lines of a number of heavy elements were carried out with no positive detections. Limits on the heavy element ions' column densities have been determined which are in broad agreement with previous studies. The further usefulness of intermediate-resolution (about 1 A) spectra for setting heavy element abundance limits in Ly-alpha systems is considered.

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