569 citations · 2.1k across the 27 of their papers we have counts for
9 papers · 1 filter
A MMT/Hectospec Redshift Survey of 24 Micron Sources in the Spitzer First Look Survey
Casey Papovich, Richard Cool, Daniel Eisenstein +6
We present a spectroscopic survey using the MMT/Hectospec fiber spectrograph of 24 micron sources selected with the Spitzer Space Telescope in the Spitzer First Look Survey. We rep…
Black Hole Masses of High-Redshift Quasars
M. Vestergaard
Black-hole masses of distant quasars cannot be measured directly, but can be estimated to within a factor 3 to 5 using scaling relationships involving the quasar luminosity and bro…
Black-Hole Mass Measurements
M. Vestergaard
The applicability and apparent uncertainties of the techniques currently available for measuring or estimating black-hole masses in AGNs are briefly summarized.
Occurrence and Global Properties of Narrow CIV lambda 1549 Absorption Lines in Moderate-Redshift Quasars
M. Vestergaard
A statistical study is presented of (a) the frequency of narrow CIV lambda 1549 absorption lines in 1.5 <~ z <~ 3.6 radio-quiet and radio-loud quasars, and of (b) the UV and radio…
Early Growth and Efficient Accretion of Massive Black Holes at High Redshift
M. Vestergaard
Black-hole masses of the highest redshift quasars (4 <~ z <~ 6) are estimated using a previously presented scaling relationship, derived from reverberation mapping of nearby quasar…
An Empirical Ultraviolet Template for Iron Emission in Quasars as Derived from I Zw 1
M. Vestergaard, B. J. Wilkes
We present an empirical template spectrum suitable for fitting/subtracting and studying the FeII and FeIII line emission in the restframe UV spectra of active galatic nuclei (AGNs)…
Emission Line Properties of the Large Bright Quasar Survey
Karl Forster, Paul J. Green, Thomas L. Aldcroft +3
We present measurements of the optical/UV emission lines for a large homogeneous sample of 993 quasars from the Large Bright Quasar Survey. Our largely automated technique accounts…
[OII] Emission, Eigenvector 1 and Orientation in Radio-quiet Quasars
J. Kuraszkiewicz, B. J. Wilkes, W. N. Brandt +1
We present supportive evidence that the Boroson and Green eigenvector 1 is not driven by source orientation. Until recently it was generally accepted that eigenvector 1 does not de…
The UV spectra of NLS1s - Implications for their broad line regions
J. K. Kuraszkiewicz, B. J. Wilkes, B. Czerny +3
We study the UV spectra of NLS1 galaxies and compare them with typical Seyfert 1 galaxies and quasars. The NLS1 spectra show narrower UV lines as well as weaker CIV lambda 1549 and…