187 citations · 717 across the 13 of their papers we have counts for
Showing 2015Show all
2 papers · 1 filter
astro-ph.GA2015★ 30 cited
HST-COS Observations of AGNs. III. Spectral Constraints in the Lyman Continuum from Composite COS/G140L Data
Evan M. Tilton, Matthew L. Stevans, J. Michael Shull +1
The rest-frame ultraviolet (UV) spectra of active galactic nuclei (AGNs) are important diagnostics of both accretion disk physics and their contribution to the metagalactic ionizin…
astro-ph.CO2015★ 81 cited
The Metagalactic Ionizing Background: A Crisis in UV Photon Production or Incorrect Galaxy Escape Fractions?
J. Michael Shull, Joshua Moloney, Charles W. Danforth +1
Recent suggestions of a "photon underproduction crisis" (Kollmeier \etal\ 2014) have generated concern over the intensity and spectrum of ionizing photons in the metagalactic ultra…