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39 papers · 1 filter
Probing Dark Energy at Galactic and Cluster Scales
David F. Mota
We investigate dark matter halo properties as a function of a time--varying dark energy equation of state. The dynamics of the collapse of the halo is governed by the form of the q…
Linear dynamics of weakly viscous accretion disks: A disk analog of Tollmien-Schlichting waves
O. M. Umurhan, G. Shaviv
This paper discusses new perspectives and approaches to the problem of disk dynamics where, in this study, we focus on the effects of viscous instabilities influenced by boundary e…
Is H3+ cooling ever important in primordial gas?
S. C. O. Glover, D. W. Savin
Studies of the formation of metal-free Population III stars usually focus primarily on the role played by H2 cooling, on account of its large chemical abundance relative to other p…
Open questions in the study of population III star formation
S. C. O. Glover, P. C. Clark, T. H. Greif +4
The first stars were key drivers of early cosmic evolution. We review the main physical elements of the current consensus view, positing that the first stars were predominantly ver…
The formation of the first galaxies and the transition to low-mass star formation
Thomas H. Greif, Dominik R. G. Schleicher, Jarrett L. Johnson +6
The formation of the first galaxies at redshifts z ~ 10-15 signaled the transition from the simple initial state of the universe to one of ever increasing complexity. We here revie…
Chemical mixing in smoothed particle hydrodynamics simulations
Thomas H. Greif, Simon C. O. Glover, Volker Bromm +1
We introduce a simple and efficient algorithm for diffusion in smoothed particle hydrodynamics (SPH) simulations and apply it to the problem of chemical mixing. Based on the concep…