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The Epoch of Helium Reionization
Aaron Sokasian, Tom Abel, Lars. E. Hernquist
We study the reionization of Helium II by quasars using a numerical approach that combines 3D radiative transfer calculations with cosmological hydrodynamical simulations. Sources…
Hydrogen-Poor Disks in Compact X-Ray Binaries
Kristen Menou, Rosalba Perna, Lars Hernquist
We show that accretion disks in several compact X-ray binaries with hydrogen-depleted donors are likely subject to a thermal ionization instability, unless they are strongly irradi…
On the "initial" Angular Momentum of Galaxies
Tom Abel, Rupert C. Croft, Lars Hernquist
Spherical density profiles and specific angular momentum profiles of Dark Matter halos found in cosmological N-body simulations have been measured extensively. The distribution of…
The Evolution of Cuspy Triaxial Galaxies Harboring Central Black Holes
Kelly Holley-Bockelmann, J. Christopher Mihos, Steinn Sigurdsson +2
We use numerical simulations to study the evolution of triaxial elliptical galaxies with central black holes. In contrast to earlier numerical studies which used galaxy models with…
Cosmological SPH simulations: The entropy equation
Volker Springel, Lars Hernquist
We discuss differences in simulation results that arise between the use of either the thermal energy or the entropy as an independent variable in smoothed particle hydrodynamics (S…
The distribution of mass around galaxies
Martin White, Lars Hernquist, Volker Springel
We explore the distribution of mass about the expected sites of galaxy formation in a high-resolution hydrodynamical simulation of a LCDM cosmology which includes cooling, star-for…