491 citations · 1.4k across the 24 of their papers we have counts for
4 papers · 1 filter
Tracing the Cosmic Metal Evolution in the Low-Redshift Intergalactic Medium
J. Michael Shull, Charles. W. Danforth, Evan M. Tilton
Using the Cosmic Origins Spectrograph aboard the Hubble Space Telescope, we measured the abundances of six ions (C III, C IV, Si III, Si IV, N V, O VI) in the low-redshift (z < 0.4…
HST-COS Observations of AGN. II. Extended Survey of Ultraviolet Composite Spectra from 159 Active Galactic Nuclei
Matthew L. Stevans, J. Michael Shull, Charles W. Danforth +1
The ionizing fluxes from quasars and other active galactic nuclei (AGN) are critical for interpreting their emission-line spectra and for photoionizing and heating the intergalacti…
Constraining UV Continuum Slopes of Active Galactic Nuclei With CLOUDY Models of Broad Line Region EUV Emission Lines
Joshua Moloney, J. Michael Shull
Understanding the composition and structure of the broad-line region (BLR) of active galactic nuclei (AGN) is important for answering many outstanding questions in supermassive bla…
The Luminosity Function at z~8 from 97 Y-band dropouts: Inferences About Reionization
Kasper B. Schmidt, Tommaso Treu, Michele Trenti +6
[Abbreviated] We present the largest search to date for Lyman break galaxies (LBGs) based on 350 arcmin of HST observations in the V-, Y-, J- and H-bands from the Brig…