Resolving Globular Cluster Formation within a Cosmological Context (2009)
Boley, Aaron C., Lake, George, Read, Justin, Teyssier, Romain
We place constraints on the formation redshifts for blue globular clusters (BGCs), independent of the details of hydrodynamics and population III star formation. The observed radial distribution of...
Dark matter disc enhanced neutrino fluxes from the Sun and Earth (2009)
Bruch, Tobias, Peter, Annika H. G., Read, Justin, Baudis, Laura, Lake, George
As disc galaxies form in a hierarchical cosmology, massive merging satellites are preferentially dragged towards the disc plane. The material accreted from these satellites forms a dark matter disc...
Dark Matter Disc Enhanced Neutrino Fluxes from the Sun and Earth (2009)
Bruch, Tobias, Peter, Annika H. G., Read, Justin, Baudis, Laura, Lake, George
As disc galaxies form in a hierarchical cosmology, massive merging satellites are preferentially dragged towards the disc plane. The material accreted from these satellites forms a dark matter disc...
Shaya, Edward, Olling, Robert, Ricotti, Massimo, Vogel, Stuart, Majewski, Steven R., Patterson, Richard J., ...
The fact that dark matter (DM), thus far, has revealed itself only on scales of galaxies and larger, again thrusts onto astrophysics the opportunity and the responsibility to confront the age old...
Large scale galactic turbulence: can self-gravity drive the observed HI velocity dispersions? (2008)
Agertz, Oscar, Lake, George, Teyssier, Romain, Moore, Ben, Mayer, Lucio, Romeo, Alessandro B.
Observations of turbulent velocity dispersions in the HI component of galactic disks show a characteristic floor in galaxies with low star formation rates and within individual galaxies the...
The Magellanic Group and the Seven Dwarfs (2008)
The Magellanic Clouds were the largest members of a group of dwarf galaxies that entered the Milky Way (MW) halo at late times. This group, dominated by the LMC, contained ~4% of the mass of the...
Small Dwarf Galaxies Within Larger Dwarfs: Why Some Are Luminous While Most Go Dark (2008)
We consider the possibility that the Magellanic Clouds were the largest members of a group of dwarf galaxies that entered the Milky Way (MW) halo at late times. Seven of the eleven brightest...
PLANETARY SYSTEM FORMATION (2007)
George Lake, Thomas Quinn, Derek C. Richardson, Joachim Stadel
The orbit of any one planet depends on the combined motion of all the planets, not to mention the actions of all these on each other. To consider simultaneously all these causes of motion and to...
Dynamical friction in constant density cores: a failure of the Chandrasekhar formula (2006)
Read, J. I., Goerdt, Tobias, Moore, Ben, Pontzen, A. P., Stadel, Joachim, Lake, George
Using analytic calculations and N-body simulations we show that in constant density (harmonic) cores, sinking satellites undergo an initial phase of very rapid (super-Chandrasekhar) dynamical...
The age dependence of galaxy clustering (2006)
Reed, Darren S., Governato, Fabio, Quinn, Thomas, Stadel, Joachim, Lake, George
We construct mock galaxy catalogues to analyse clustering properties of a Lambda cold dark matter (LCDM) universe within a cosmological dark matter simulation of sufficient resolution to resolve...
Evolution of the density profiles of dark matter haloes (2005)
Reed, Darren, Governato, Fabio, Verde, Licia, Gardner, Jeffrey, Quinn, Thomas, Stadel, Joachim, ...
Also archived in: arXiv: astro-ph/0312544 v3 1 Apr 2005
Dark Matter Subhaloes in Numerical Simulations (2004)
Reed, Darren, Governato, Fabio, Quinn, Thomas, Gardner, Jeffrey, Stadel, Joachim, Lake, George
We use cosmological LCDM numerical simulations to model the evolution of the substructure population in sixteen dark matter haloes with resolutions of up to seven million particles within the virial...
Evolution of the Density Profiles of Dark Matter Haloes (2003)
Reed, Darren, Governato, Fabio, Verde, Licia, Gardner, Jeffrey, Quinn, Thomas, Stadel, Joachim, ...
We use numerical simulations in a Lambda CDM cosmology to model density profiles in a set of 16 dark matter haloes with resolutions of up to 7 million particles within the virial radius. These...
Cold Dark Matter's Small Scale Crisis Grows Up (2003)
The Cold Dark Matter (CDM) theory predicts a wealth of substructure within dark halos. These predictions match observations of galaxy clusters like the nearby Virgo cluster. However, CDM has a "small...
Evolution of the Mass Function of Dark Matter Haloes (2003)
Reed, Darren, Gardner, Jeffrey, Quinn, Thomas, Stadel, Joachim, Fardal, Mark, Lake, George, ...
We use a high resolution $\Lambda$CDM numerical simulation to calculate the mass function of dark matter haloes down to the scale of dwarf galaxies, back to a redshift of fifteen, in a 50 $h^{-1}$Mpc...
Dark matter in Draco and the Local Group: Implications for direct detection experiments (2001)
Moore, Ben, Calcaneo-Roldan, Carlos, Stadel, Joachim, Quinn, Tom, Lake, George, Ghigna, Sebastiano, ...
We use a cosmological simulation of the Local Group to make quantitative and speculative predictions for direct detection experiments. Cold dark matter (CDM) halos form via a complex series of...
The Metamorphosis of Tidally Stirred Dwarf Galaxies (2001)
Mayer, Lucio, Governato, Fabio, Colpi, Monica, Moore, Ben, Quinn, Thomas, Wadsley, James, ...
We present results from high-resolution N-Body/SPH simulations of rotationally supported dwarf irregular galaxies moving on bound orbits in the massive dark matter halo of the Milky Way.The dwarf...
Tidal stirring and the origin of dwarf spheroidals in the Local Group (2000)
Mayer, Lucio, Governato, Fabio, Colpi, Monica, Moore, Ben, Quinn, Tom, Wadsley, James, ...
N-Body/SPH simulations are used to study the evolution of dwarf irregular galaxies (dIrrs) entering the dark matter halo of the Milky Way or M31 on plunging orbits. We propose a new dynamical...
Formation of Proto-Globular Cluster Clouds by Thermal Instability (2000)
Kang, Hyesung, Lake, George, Ryu, Dongsu
Many models of globular cluster formation assume the presence of cold dense clouds in early universe. Here we re-examine the Fall & Rees (1985) model for formation of proto-globular cluster clouds...
Ghigna, Sebastiano, Moore, Ben, Governato, Fabio, Lake, George, Quinn, Tom, Stadel, Joachim
Can N-body simulations reliably determine the structural properties of dark matter halos? Focussing on a Virgo-sized galaxy cluster, we increase the resolution of current ``high resolution...
Dark Matter Substructure in Galactic Halos (1999)
Moore, Ben, Ghigna, Sebastiano, Governato, Fabio, Lake, George, Quinn, Tom, Stadel, Joachim, ...
We use numerical simulations to examine the substructure within galactic and cluster mass halos that form within a hierarchical universe. Clusters are easily reproduced with a steep mass spectrum of...
Cold collapse and the core catastrophe (1999)
Moore, Ben, Quinn, Tom, Governato, Fabio, Stadel, Joachim, Lake, George
We show that a universe dominated by cold dark matter fails to reproduce the rotation curves of dark matter dominated galaxies, one of the key problems that it was designed to resolve. We perform...
The fate of LSB galaxies in clusters and the origin of the diffuse intra-cluster light (1999)
Moore, Ben, Lake, George, Stadel, Joachim, Quinn, Thomas
We follow the evolution of disk galaxies within a cluster that forms hierarchically in a standard cold dark matter N-body simulation. At a redshift z=0.5 we select several dark matter halos that have...
Substructure in Dark Halos: Orbital Eccentricities and Dynamical Friction (1998)
Lewis, Geraint F., Lake, George, Stadel, Joachim
We examine the distributions of eccentricities of orbits within mass distributions like those we see for galaxies and clusters. A comprehensive understanding of these orbital properties is essential...
On the Survival and Destruction of Spiral Galaxies in Clusters (1998)
Moore, Ben, Lake, George, Quinn, Thomas, Stadel, Joachim
We follow the evolution of disk galaxies within a cluster that forms hierarchically in a cold dark matter N-body simulation. At a redshift z=0.5 we select several dark matter halos that have quiet...
N-point correlations in CDM and $\Omega$CDM Simulations (1998)
Szapudi, Istvan, Quinn, Thomas, Stadel, Joachim, Lake, George
Higher order statistics are investigated in ($\Omega$)CDM universes by analyzing $500\mpc$ high resolution tree N-body simulations with both $\Omega = 1$, and $\Omega < 1$. The amplitudes of the...
Dark Matter Halos within Clusters (1998)
Ghigna, Sebastiano, Moore, Ben, Governato, Fabio, Lake, George, Quinn, Thomas, Stadel, Joachim
We examine the properties of dark matter halos within a rich galaxy cluster using a high resolution simulation that captures the cosmological context of a cold dark matter universe. The mass and...
The Structure and Dynamics of Cold Dark Matter Halos (1997)
Moore, Ben, Ghigna, Sebastiano, Governato, Fabio, Lake, George, Quinn, Tom, Stadel, Joachim
We investigate the internal structure of cold dark matter halos using high resolution N-body simulations. As the mass and force resolution are increased, halo density profiles become steeper,...
Smooth Particle Hydrodynamics: Models, Applications, and Enabling Technologies (1997)
Hut, Piet, Hernquist, Lars, Lake, George, Makino, Jun, McMillan, Steve, Sterling, Thomas
We present the results from a two-day study in which we discussed various implementations of Smooth Particle Hydrodynamics (SPH), one of the leading methods used across a variety of areas of...
Time stepping N-body simulations (1997)
Quinn, Thomas, Katz, Neal, Stadel, Joachim, Lake, George
Leapfrog integration has been the method of choice in N-body simulations owing to its low computational cost for a symplectic integrator with second order accuracy. We introduce a new leapfrog...
Resolving the Structure of Cold Dark Matter Halos (1997)
Moore, Ben, Governato, Fabio, Quinn, Tom, Stadel, Joachim, Lake, George
We examine the effects of mass resolution and force softening on the density profiles of cold dark matter halos that form within cosmological N-body simulations. As we increase the mass and force...
Morphological Transformation from Galaxy Harassment (1997)
Moore, Ben, Lake, George, Katz, Neal
Galaxy morphologies in clusters have undergone a remarkable transition over the past several billion years. Distant clusters at $z \sim 0.4$ are filled with small spiral galaxies, many of which are...
The Formation of Quasars in Low Luminosity Hosts via Galaxy Harassment (1997)
Lake, George, Katz, Neal, Moore, Ben
We have simulated disk galaxies undergoing continual bombardment by other galaxies in a rich cluster. "Galaxy harassment" leads to dramatic evolution of smaller disk galaxies and provides an...
Galaxy Harassment and the Evolution of Clusters of Galaxies (1995)
Moore, Ben, Katz, Neal, Lake, George, Dressler, Alan, Oemler, Augustus
Disturbed spiral galaxies with high rates of star formation pervaded clusters of galaxies just a few billion years ago, but nearby clusters exclude spirals in favor of ellipticals. ``Galaxy...
On the Destruction and Over-Merging of Dark Halos in Dissipationless N-body Simulations (1995)
Moore, Ben, Katz, Neal, Lake, George
N-body simulations that follow only a collisionless dark matter component have failed to produce galaxy halos or substructure within dense environments. We investigate the `over-merging' problem...
Can the Dark Matter be $10^6$ Solar Mass Objects? (1993)
Rix, Hans-Walter, Lake, George
If the dark matter in galactic halos is made up of compact, macroscopic objects (MO), such as black holes with $M_\MO >>M_{stars}$, gravitational scattering will lead to kinematic heating of the...
Thesis (Ph. D.)--Princeton.
Thesis (Ph. D.)--Princeton University, 1979.
A systems approach to facility investment ranking for the Naval Air Training command / (1970)
"February, 1970."