91 citations · 303 across the 16 of their papers we have counts for
3 papers · 2 filters
Quasar Elemental Abundances and Host Galaxy Evolution
F. Hamann, M. Dietrich, B. Sabra +1
High redshift quasars mark the locations where massive galaxies are rapidly being assembled and forming stars. There is growing evidence that quasar environments are metal-rich out…
How Massive Are BALQSO Winds?
F. Hamann, B. Sabra, V. Junkkarinen +2
We are involved in a program to derive properties of broad absorption line (BAL) winds in quasars using combined UV and X-ray observations. A major obstacle is large uncertainties…
The Nature of the UV/X-Ray Absorber in PG 2302+029
Bassem M. Sabra, Fred Hamann, Buell T. Jannuzi +2
We present Chandra X-ray observations of the radio-quiet QSO PG 2302+029. This quasar has a rare system of ultra-high velocity (-56,000 km/s) UV absorption lines that form in an ou…