Optimal extraction of quasar Lyman limit absorption systems from the IUE archive

Details Optimal extraction of quasar Lyman limit absorption systems from the IUE archive Optimal extraction of quasar Lyman limit absorption systems from the IUE archive

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ucsd.rept.....t&link_type=abstract

Final Report California Univ., San Diego, La Jolla.

Computer Science

Absorption Spectra, Abundance, Lyman Spectra, Quasars, Red Shift, Stellar Evolution, Stellar Spectra, Data Bases, Deuterium, Hydrogen, Ionization, Iue, Metallicity, Pattern Recognition, Velocity Distribution

Scientific paper

The IUE archive contains a wealth of information on Lyman limit absorption systems (LLS) in quasar spectra. QSO spectra from the IUE data base were optimally extracted, coadded, and analyzed to yield a homogeneous samples of LLS at low red shifts. This sample comprise 36 LLS, twice the number previously analyzed low z samples. These systems are ideal for the determination of the origin, redshift evolution, ionization, velocity dispersions and the metal abundances of absorption systems. Two of them are also excellent targets for the primordial Deuterium to Hydrogen ratio.

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