278 citations · 958 across the 20 of their papers we have counts for
20 papers
Metal Enrichment due to Embedded Stars in AGN Discs
Jiamu Huang, Douglas N. C. Lin, Gregory Shields
We separately assess elemental abundances in AGNs' broad and narrow emission line regions (BLR and NLR), based on a critical assessment of published results together with new photo…
On the Source of the Dust Extinction in Type Ia Supernovae and the Discovery of Anomalously Strong Na I Absorption
M. M. Phillips, Joshua D. Simon, Nidia Morrell +28
High-dispersion observations of the Na I D 5890, 5896 and K I 7665, 7699 interstellar lines, and the diffuse interstellar band at 5780 Angstroms in the spectra of 32 Type Ia supern…
Dependence of Nebular Heavy-Element Abundance on H I Content for Spiral Galaxies
Paul Robertson, Gregory A. Shields, Romeel Davé +2
We analyze the galactic H I content and nebular log(O/H) for 60 spiral galaxies in the Moustakas et al. (2006) spectral catalog. After correcting for the mass-metallicity relations…
The Black Hole Mass - Stellar Velocity Dispersion Relationship for Quasars in the Sloan Digital Sky Survey Data Release 7
Sarah Salviander, Gregory A. Shields
We assess evolution in the black hole mass - stellar velocity dispersion relationship (M-sigma relationship) for quasars in the Sloan Digital Sky Survey Data Release 7 for the reds…
Linking Type Ia Supernova Progenitors and their Resulting Explosions
Ryan J. Foley, Joshua D. Simon, Christopher R. Burns +7
Comparing the ejecta velocities at maximum brightness and narrow circumstellar/interstellar Na D absorption line profiles of a sample of 23 Type Ia supernovae (SNe Ia), we determin…
Enhanced Abundances in Spiral Galaxies of the Pegasus I Cluster
Paul Robertson, Gregory A. Shields, Guillermo A. Blanc
We study the influence of cluster environment on the chemical evolution of spiral galaxies in the Pegasus I cluster. We determine the gas-phase heavy element abundances of six gala…