Other
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.5407m&link_type=abstract
American Astronomical Society, AAS Meeting #211, #54.07; Bulletin of the American Astronomical Society, Vol. 39, p.824
Other
Scientific paper
We present chemical abundance measurements from medium resolution observations of 8 sub-damped Lyman-α absorbers and 2 strong Lyman-limit systems at z < 1.5 observed with the MIKE spectrograph on the 6.5m Magellan II Clay telescope. These observations were taken as part of an ongoing project to determine abundances in z < 1.5 quasar absorption line systems (QSOALS) focusing on sub-DLA systems. Lines of Mg I, Mg II, Al II, Al III, Ca II, Mn II, Fe II, and Zn II were detected and column densities were determined. We discuss the metallicites of these absorbers based on the abundaces of Fe and Zn. Fe II lines were detected in all systems, with an average Fe abundance higher than typical abundances for DLA systems at these redshifts. We also discuss the abundances of other elements (e.g., [Fe/H], [Mn/H]), and examine relative abundances (e.g., [Mn/Fe], [Zn/Fe], etc) in these absorbers. Lastly we discuss the results of Cloudy photoionization modeling to determine the effects of ionization in these systems. This work was supported in part by NSF grant AST-0607739 to University of South Carolina.
Crotts Arlin
Khare Pushpa
Kulkarni Varsha P.
Lauroesch James Thomas
Meiring Joe
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