Recent strong lensing data and rotation curves of dwarf galaxies indicate that many galactic clusters may have a soft core instead of a central cusp in their density distribution. This result challenges the standard CDM (Cold Dark Matter) theory prediction based on N-body simulations. We find that the observed density profile is consistent with that of a spherical gas of degenerate fermions suc...

Predictions are developed for the structure of plasma parameter profiles of H-mode pedestals in transport quasi-equilibrium in tokamak plasmas. They are based on assuming paleoclassical radial plasma transport processes dominate throughout the pedestal. The key physical process in this model is that the electron temperature gradient in the pedestal increases to the magnitude required for paleoc...

We simulate the accretion of high-density dwarf galaxies by low-density giant galaxies, using models that contain both power-law central density cusps and central point masses representing supermassive black holes. The final density profiles of the merger remnants are always similar to the initial density profile of the giant galaxy, for two reasons. 1. The density of the dwarf galaxy is reduce...

Different methods have been proposed for in situ root-length density (RLD) measurement. One widely employed is the time-consuming sampling of soil cores or monoliths (MO). The profile wall (PW) method a less precise, but faster and laborious alternative. However, depth-differentiated functions to convert PW RLD estimates MO measurements not yet reported. In this study, we perform regression ana...

A rich spectrum of oscillations in the Alfvénic range has been observed in DIII-D tokamak reversedshear discharges heated by neutral beams. During the discharge phase characterized by Alfvénic activity, the energetic particle density profile, as calculated by a classical deposition model (TRANSP), appears to be much more peaked than that observed experimentally, as inferred, e.g., from the equi...

I compare the density profile of dark matter (DM) halos in cold dark matter (CDM) N-body simulations with 1 h Mpc, 32 h Mpc, 256 h Mpc and 1024 h Mpc box sizes. I compare the profiles when the most massive halos are composed of about 10 DM particles. The DM density profiles of the halos in the 1 h Mpc box at redshift z ∼ 10 show systematically shallower cores with respect to the corresponding h...

The high spatial ~>2 mm depending upon plasma conditions! and temporal ~10 ms! resolution possible with the DIII-D solid state profile reflectometer system makes it possible to investigate profile modifications associated with plasma instabilities. In order to take full advantage of this fast sweep and high resolution capability, multiple issues had to be addressed, including fast data acquisit...

We study the nanoscale behaviour of the density of a simple fluid in the vicinity of an equilibrium contact line for a wide range of Young contact angles θY ∈ [40 ◦, 135◦]. Cuts of the density profile at various positions along the contact line are presented, unravelling the apparent step-wise increase of the film height profile observed in contour plots of the density. The density profile is e...