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The Nature of Damped Lyman Alpha Systems and Their Hosts in the Standard Cold Dark Matter Universe
Renyue Cen
Using adaptive mesh-refinement cosmological hydrodynamic simulations with a physically motivated supernova feedback prescription we show that the standard cold dark matter model ca…
Extended Lyman-Alpha Emission around Star-forming Galaxies
Zheng Zheng, Renyue Cen, David Weinberg +2
Lyman-alpha (Lya) photons that escape the interstellar medium of star-forming galaxies may be resonantly scattered by neutral hydrogen atoms in the circumgalactic and intergalactic…
The State of the Universe at z~6
Renyue Cen
In the context stellar reionization in the standard cold dark matter model, we analyze observations at z~6 and are able to draw three significant conclusions with respect to star f…
Star Formation Feedback and Metal Enrichment History Of The Intergalactic Medium
Renyue Cen, Nora Elisa Chisari
Using hydrodynamic simulations we compute the metal enrichment history of the intergalactic medium (IGM). We show that galactic superwind (GSW) feedback can transport metals to the…
21cmFAST: A Fast, Semi-Numerical Simulation of the High-Redshift 21-cm Signal
Andrei Mesinger, Steven Furlanetto, Renyue Cen
We introduce a powerful semi-numeric modeling tool, 21cmFAST, designed to efficiently simulate the cosmological 21-cm signal. Our code generates 3D realizations of evolved density,…
Comparison Of Reionization Models: Radiative Transfer Simulations And Approximate, Semi-Numeric Models
Oliver Zahn, Andrei Mesinger, Matthew McQuinn +3
We compare the predictions of four different algorithms for the distribution of ionized gas during the Epoch of Reionization. These algorithms are all used to run a 100 Mpc/h simul…