358 citations · 1.5k across the 21 of their papers we have counts for
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Precious Metals in SDSS Quasar Spectra II: Tracking the Evolution of Strong, 0.4 < z < 2.3 MgII Absorbers with Thousands of Systems
Eduardo N. Seyffert, Kathy L. Cooksey, Robert A. Simcoe +3
We have performed an analysis of over 34,000 MgII doublets at 0.36 < z < 2.29 in Sloan Digital Sky Survey (SDSS) Data-Release 7 quasar spectra; the catalog, advanced data products,…
Extremely metal-poor gas at a redshift of 7
Robert A. Simcoe, Peter W. Sullivan, Kathy L. Cooksey +3
In typical astrophysical environments, the abundance of heavy elements ranges from 0.001 to 2 times the solar concentration. Lower abundances have been seen in select stars in the…
Precious Metals in SDSS Quasar Spectra I: Tracking the Evolution of Strong, 1.5 < z < 4.5 CIV Absorbers with Thousands of Systems
Kathy L. Cooksey, Melodie M. Kao, Robert A. Simcoe +2
We have vastly increased the CIV statistics at intermediate redshift by surveying the thousands of quasars in the Sloan Digital Sky Survey Data-Release 7. We visually verified over…