134 citations · 511 across the 10 of their papers we have counts for
10 papers
The host galaxies of FeLoBAL quasars at z0.9 are not dominated by recent major mergers
C. Villforth, H. Herbst, F. Hamann +4
Theoretical models have suggested an evolutionary model for quasars, in which most of luminous quasars are triggered by major mergers. It is also postulated that reddening as well…
On the structure and energetics of quasar broad absorption-line outflows
Fred Hamann, Hanna Herbst, Isabelle Paris +1
Quasar accretion-disk outflows might play an important role in galaxy evolution, but they are notoriously difficult to study due to line saturation and blending problems in the Ly-…
Quasar outflow energetics from broad absorption line variability
S. M. McGraw, J. C. Shields, F. W. Hamann +2
Quasar outflows have long been recognized as potential contributors to the co-evolution between supermassive black holes (SMBHs) and their host galaxies. The role of outflows in AG…
Quasars with PV broad absorption in BOSS data release 9
Daniel M. Capellupo, Fred Hamann, Hanna Herbst +7
Broad absorption lines (BALs) found in a significant fraction of quasar spectra identify high-velocity outflows that might be present in all quasars and could be a major factor in…
Host galaxies of luminous z0.6 quasars: Major mergers are not prevalent at the highest AGN luminosities
C. Villforth, T. Hamilton, M. M. Pawlik +10
Galaxy interactions are thought to be one of the main triggers of Active Galactic Nuclei (AGN), especially at high luminosities, where the accreted gas mass during the AGN lifetime…
Extremely Red Quasars in BOSS
Fred Hamann, Nadia L. Zakamska, Nicholas Ross +11
Red quasars are candidate young objects in an early transition stage of massive galaxy evolution. Our team recently discovered a population of extremely red quasars (ERQs) in the B…