Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21934203l&link_type=abstract
American Astronomical Society, AAS Meeting #219, #342.03
Astronomy and Astrophysics
Astronomy
Scientific paper
Foreground absorption features observed in the spectra of distant quasars provide insight into the evolution of elemental abundances in galaxies and the intergalactic medium as well as the growth of large-scale structure from high redshift to the present. Through the development of an automated pipeline to extract and identify absorption lines in SDSS-III BOSS quasar spectra, we have compiled the largest sample of metal absorbers to date. Using these data, we present new high-precision measurements of the redshift evolution of the number densities and equivalent width distributions of Mg II and C IV absorbers. These measurements sample a wider redshift range than previously attainable and provide new insights into the evolution of the gas content of galaxy haloes from z 5.
AlSayyad Yusra
Lundgren Britt
Myers Adam
Petitjean Patrick
Pieri Matthew M.
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