422 citations · 2k across the 35 of their papers we have counts for
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astro-ph.GA2018★ 25 cited
Mapping quasar light echoes in 3D with Lyα forest tomography
Tobias M. Schmidt, Joseph F. Hennawi, Khee-Gan Lee +3
The intense radiation emitted by luminous quasars dramatically alters the ionization state of their surrounding IGM. This so-called proximity effect extends out to tens of Mpc, and…
astro-ph.GA2017★ 49 cited
Statistical Detection of the HeII Transverse Proximity Effect: Evidence for Sustained Quasar Activity for 25 Million Years
Tobias M. Schmidt, Gabor Worseck, Joseph F. Hennawi +2
The HeII transverse proximity effect -- enhanced HeII Ly~transmission in a background sightline caused by the ionizing radiation of a foreground quasar -- offers a unique opport…