54 citations · 54 across the 1 of their papers we have counts for
5 papers
Physical Properties of the Narrow-Line Region of Low-Mass Active Galaxies
Randi R. Ludwig, Jenny E. Greene, Aaron J. Barth +1
We present spectroscopic observations of 27 active galactic nuclei (AGN) with some of the lowest black hole (BH) masses known. We use the high spectral resolution and small apertur…
Exploring the Low-Mass End of The M-Sigma Relation with Active Galaxies
Ting Xiao, Aaron J. Barth, Jenny E. Greene +4
We present new measurements of stellar velocity dispersions, using spectra obtained with the Keck Echellette Spectrograph and Imager (ESI) and the Magellan Echellette (MagE), for 7…
Fe II Emission in AGN: The Role of Total and Gas-Phase Iron Abundance
Gregory A. Shields, Randi R. Ludwig, Sarah Salviander
Active galactic nuclei (AGN) have Fe II emission from the broad line region (BLR) that differs greatly in strength from object to object. We examine the role of the total and gas-p…
Strong [O III] Objects Among SDSS Broad-Line Active Galaxies
Randi R. Ludwig, Beverley Wills, Jenny E. Greene +1
We present the results of a spectral principal component analysis on 9046 broad-line AGN from the Sloan Digital Sky Survey. We examine correlations between spectral regions within…
Redshift Evolution in Black Hole-Bulge Relations: Testing CIV-based Black Hole Masses
Jenny E. Greene, Chien Y. Peng, Randi R. Ludwig
We re-examine claims of redshift evolution in black hole-bulge scaling relations based on lensed quasars. In particular, we refine the black hole mass estimates using measurements…