1 citations · 1 across the 2 of their papers we have counts for
6 papers
Evidence for Early or Efficient Black-Hole Growth
M. Vestergaard
Mass estimates, based on scaling relationships, are presented of central black holes in luminous quasars at a range of redshifts (z < 0.5, 1.2 ~< z ~< 6.3). The data show that very…
Emission Line Properties of AGN from a post-COSTAR FOS HST Spectral Atlas
J. K. Kuraszkiewicz, P. J. Green, D. M. Crenshaw +4
This paper joins a series compiling consistent emission line measurements of large AGN spectral databases, useful for reliable statistical studies of emission line properties. It i…
Narrow CIV lambda 1549A Absorption Lines in Moderate-Redshift Quasars
M. Vestergaard
A large, high-quality spectral data base of well-selected, moderate-redshift radio-loud and radio-quiet quasars is used to characterize the incidence of narrow associated CIV lambd…
An Empirical Ultraviolet Iron Spectrum Template Applicable to Active Galaxies
M. Vestergaard, B. J. Wilkes
Iron emission is often a severe contaminant in optical-ultraviolet spectra of active galaxies. Its presence complicates emission line studies. A viable solution, already successful…
Radio imaging of core-dominated high redshift quasars
Peter D. Barthel, Marianne Vestergaard, Colin J. Lonsdale
VLA imaging at kiloparsec-scale resolution of sixteen core-dominated radio-loud QSOs is presented. Many objects appear to display variable radio emission and their radio morphologi…
X-ray Emission from the Radio Jet in 3C 120
D. E. Harris, J. Hjorth, A. C. Sadun +2
We report the discovery of X-ray emission from a radio knot at a projected distance of 25" from the nucleus of the Seyfert galaxy, 3C 120. The data were obtained with the ROSAT Hig…