146 citations · 435 across the 7 of their papers we have counts for
4 papers · 1 filter
A Change in the Physical State of Carinae?
K. Davidson, J. C. Martin, R. M. Humphreys +8
During Car's spectroscopic event in mid-2003, the stellar wind's bright H and H emission lines temporarily had a distinctive shape unlike that reported on any previous oc…
The Origin of Fe II Emission in AGN
J. A. Baldwin, G. J. Ferland, K. T. Korista +2
We used a very large set of models of broad emission line (BEL) clouds in AGN to investigate the formation of the observed Fe II emission lines. We show that photoionized BEL cloud…
Implications of Quasar Black Hole Masses at High Redshifts
Matthias Dietrich, Fred Hamann
We investigated a sample of 15 luminous high-redshift quasars (3.3 < z < 5.1) to measure the mass of their super-massive black holes (SMBH) and compare, for the first time, results…
Ionization and Abundances in Intrinsic QSO Absorption-Line Systems
F. Hamann, T. Barlow, R. D. Cohen +2
We discuss two aspects of the ionization and abundances in QSO intrinsic absorbers. First, we use the high-ionization doublet Ne VIII 770,780 to test the relationship between the U…