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Properties of Dark Matter Haloes in Clusters, Filaments, Sheets and Voids
Oliver Hahn, Cristiano Porciani, C. Marcella Carollo +1
Using a series of high-resolution N-body simulations of the concordance cosmology we investigate how the formation histories, shapes and angular momenta of dark-matter haloes depen…
Natural Downsizing in Hierarchical Galaxy Formation
Eyal Neistein, Frank C. van den Bosch, Avishai Dekel
Stellar-population analyses of today's galaxies show "downsizing", where the stars in more massive galaxies tend to have formed earlier and over a shorter time span. We show that t…
A Revised Model for the Formation of Disk Galaxies: Low Spin and Dark-Halo Expansion
Aaron A. Dutton, Frank C. van den Bosch, Avishai Dekel +1
We use observed rotation velocity-luminosity (VL) and size-luminosity (RL) relations to single out a specific scenario for disk galaxy formation in the LCDM cosmology. Our model in…
Shapes of Stellar Systems and Dark Halos from Simulations of Galaxy Major Mergers
Gregory S. Novak, Thomas J. Cox, Joel R. Primack +2
Using a sample of 89 snapshots from 58 hydrodynamic binary galaxy major merger simulations, we find that stellar remnants are mostly oblate while dark matter halos are mostly prola…
The Dissipative Merger Progenitors of Elliptical Galaxies
Avishai Dekel, Thomas, J. Cox
We address the deviations of the scaling relations of elliptical galaxies from the expectations based on the virial theorem and homology, including the "tilt" of the "fundamental p…
Kinematical and Dynamical Modeling of Elliptical Galaxies
G. A. Mamon, E. Lokas, A. Dekel +2
Elements of kinematical and dynamical modeling of elliptical galaxies (Es) are presented. In projection, NFW models resemble Sersic models, but with a very narrow range of shapes (…
Lost and found dark matter in elliptical galaxies
Felix Stoehr, Gary A. Mamon, Avishai Dekel +1
The kinematical properties of elliptical galaxies formed during the mergers of equal mass, stars+gas+dark matter spiral galaxies are compared to the observed low velocity dispersio…
Modelling the Galaxy Bimodality: Shutdown Above a Critical Halo Mass
A. Cattaneo, A. Dekel, J. Devriendt +2
We reproduce the blue and red sequences in the observed joint distribution of colour and magnitude for galaxies at low and high redshifts using hybrid N-body/semi-analytic simulati…