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Comparing AMR and SPH Cosmological Simulations: I. Dark Matter & Adiabatic Simulations
Brian W. O'Shea, Kentaro Nagamine, Volker Springel +2
We compare two cosmological hydrodynamic simulation codes in the context of hierarchical galaxy formation: The SPH code GADGET, and the Eulerian AMR code ENZO. Both codes represent…
A QED Model for the Origin of Bursts from SGRs and AXPs
Jeremy S. Heyl, Lars Hernquist
We propose a model to account for the bursts from soft gamma repeaters (SGRs) and anomalous X-ray pulsars (AXPs) in which quantum electrodynamics (QED) plays a vital role. In our t…
21 Centimeter Fluctuations from Cosmic Gas at High Redshifts
Matias Zaldarriaga, Steven Furlanetto, Lars Hernquist
The relatively large Thomson optical depth, tau_e, inferred recently from the WMAP observations suggests that the Universe was reionized in a more complex manner than previously be…
Photometric Properties of Lyman-break Galaxies at z=3 in Cosmological SPH Simulations
Kentaro Nagamine, Volker Springel, Lars Hernquist +1
We study the photometric properties of Lyman-break galaxies (LBGs) formed by redshift z=3 in a set of large cosmological smoothed-particle hydrodynamics simulations of the Lambda c…
Is There a Missing Galaxy Problem at High Redshift?
Kentaro Nagamine, Renyue Cen, Lars Hernquist +2
We study the evolution of the global stellar mass density in a Lambda cold dark matter universe using two different types of hydrodynamical simulations (Eulerian TVD and SPH) and t…
Simulation of Soft X-ray Emission Lines from the Missing Baryons
T. Fang, R. A. C. Croft, W. T. Sanders +5
We study the soft X-ray emission (0.1 - 1 keV) from the Warm-Hot Intergalactic Medium (WHIM) in a hydrodynamic simulation of a Cold Dark Matter universe. Our main goal is to invest…