The Metal Abundances in Low-Redshift Damped Ly-Alpha Galaxies

Details The Metal Abundances in Low-Redshift Damped Ly-Alpha Galaxies The Metal Abundances in Low-Redshift Damped Ly-Alpha Galaxies

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cxo..prop..197t&link_type=abstract

Chandra Proposal ID #01700946

Computer Science

Chandra Proposal Id #01700946

Scientific paper

The aim of this proposed AXAF-ACIS program is to detect or constrain the amount of low-redshift photoelectric absorption caused by metals in five low-redshift QSO damped Ly-alpha systems. AXAF-ACIS-S (BI) can be used to derive accurate determinations of metal-to-hydrogen ratios in the range 1.0 to 0.1 times solar abundances for the low-redshift systems, providing they have sufficiently high HI column densities. In the HI-disk paradigm for damped systems, metallicities should approach approximately solar abundances. This can be tested. More generally, this program will lead to important empirical results on the chemical enrichment history of the gaseous components of damped Ly-alpha galaxies.

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