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Simulating Cosmic Reionization at Large Scales I: the Geometry of Reionization
Ilian T. Iliev, Garrelt Mellema, Ue-Li Pen +3
We present the first large-scale radiative transfer simulations of cosmic reionization, in a simulation volume of (100/h Mpc)^3, while at the same time capturing the dwarf galaxies…
Observational Evidence for Extra Dimensions from Dark Matter
Bo Qin, Ue-Li Pen, Joseph Silk
Recent astronomical observations of systems of dark matter, which have been cited as providing possible support for self-interacting cold dark matter, may provide evidence for the…
Rotation in Gravitational Lenses
Ue-Li Pen, Shude Mao
Gravitational lensing deflects light. A single lens deflector can only shear images, but cannot induce rotations. Multiple lens planes can induce rotations. Such rotations can be o…
Mapping dark matter with cosmic magnification
Pengjie Zhang, Ue-Li Pen
We develop a new tool to generate statistically precise dark matter maps from the cosmic magnification of galaxies with distance estimates. We show how to overcome the intrinsic cl…
Ionization fronts and their interaction with density fluctuations: implications for reionization
Ilian T. Iliev, Paul R. Shapiro, Evan Scannapieco +4
The propagation of cosmological ionization fronts (I-fronts) during reionization is strongly influenced by small-scale structure. Here we summarize our recent attemps to understand…
Precision measurement of cosmic magnification from 21 cm emitting galaxies
Pengjie Zhang, Ue-Li Pen
We show how precision lensing measurements can be obtained through the lensing magnification effect in high redshift 21cm emission from galaxies. Normally, cosmic magnification mea…