Average Extinction Curves and Relative Abundances for QSO Absorption Line Systems at 1 <= z_abs < 2

Donald G. York, Pushpa Khare, Daniel Vanden Berk +21

We have studied a sample of 809 Mg II absorption systems with 1.0 < z_abs < 1.86 in the spectra of SDSS QSOs, with the aim of understanding the nature and abundance of the dust and…