Magnesium, iron, and calcium in the Z = 0.39498 21 centimeter absorber of PKS 1229-021

Details Magnesium, iron, and calcium in the Z = 0.39498 21 centimeter absorber of PKS 1229-021 Magnesium, iron, and calcium in the Z = 0.39498 21 centimeter absorber of PKS 1229-021

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...293..387b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 293, June 15, 1985, p. 387-393.

Astronomy and Astrophysics

Astrophysics

32

Absorption Spectra, Astronomical Spectroscopy, Calcium, Extragalactic Radio Sources, Iron, Magnesium, Quasars, Abundance, Centimeter Waves, Emission Spectra, Opacity

Scientific paper

Sensitive observations of the Fe II, Mg I, Mg II, and Ca II lines in the spectrum of PKS 1229-021 at z = 0.39498 with the Multiple Mirror Telescope confirm previous deductions about the velocity structure of the absorber that were based on curve-of-growth analysis of optical data and the width of the 21 cm absorption profile. The velocity and opacity structure conforms to a multicloud picture where the line of sight to the QSO encounters both the disk and the halo of an intervening galaxy. The new observations also find a Mg I line of 'normal' strength in contrast to earlier observations. No Ca II lines are detected.

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