Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Colberg, Jörg M."'
Autor:
Colberg, Joerg M., Di Matteo, Tiziana
We make use of the first high--resolution hydrodynamic simulations of structure formation which self-consistently follows the build up of supermassive black holes introduced in Di Matteo et al. (2007) to investigate the relation between black holes (
Externí odkaz:
http://arxiv.org/abs/0804.1756
Autor:
Colberg, Joerg M., Pearce, Frazer, Foster, Caroline, Platen, Erwin, Brunino, Riccardo, Neyrinck, Mark, Basilakos, Spyros, Fairall, Anthony, Feldman, Hume, Gottloeber, Stefan, Hahn, Oliver, Hoyle, Fiona, Mueller, Volker, Nelson, Lorne, Plionis, Manolis, Porciani, Cristiano, Shandarin, Sergei, Vogeley, Michael S., van de Weygaert, Rien
Despite a history that dates back at least a quarter of a century studies of voids in the large--scale structure of the Universe are bedevilled by a major problem: there exist a large number of quite different void--finding algorithms, a fact that ha
Externí odkaz:
http://arxiv.org/abs/0803.0918
Publikováno v:
Mon.Not.Roy.Astron.Soc. 386 (2008) 1285-1293
We investigate the properties of one--dimensional flux ``voids'' (connected regions in the flux distribution above the mean flux level) by comparing hydrodynamical simulations of large cosmological volumes with a set of observed high--resolution spec
Externí odkaz:
http://arxiv.org/abs/0801.1105
Publikováno v:
Mon.Not.Roy.Astron.Soc. 360 (2005) 216-226
We study the formation and evolution of voids in the dark matter distribution using various simulations of the popular $\Lambda$ Cold Dark Matter cosmogony. We identify voids by requiring them to be regions of space with a mean overdensity of -0.8 or
Externí odkaz:
http://arxiv.org/abs/astro-ph/0409162
Publikováno v:
Mon.Not.Roy.Astron.Soc. 359 (2005) 272-282
The large--scale structure (LSS) in the Universe comprises a complicated filamentary network of matter. We study this network using a high--resolution simulation of structure formation of a $\Lambda$ Cold Dark Matter cosmology. We investigate the dis
Externí odkaz:
http://arxiv.org/abs/astro-ph/0406665
Publikováno v:
Mon.Not.Roy.Astron.Soc.307:537,1999
This is the third paper in a series which combines N-body simulations and semi-analytic modelling to provide a fully spatially resolved simulation of the galaxy formation and clustering processes. Here we extract mock redshift surveys from our simula
Externí odkaz:
http://arxiv.org/abs/astro-ph/9812009
Publikováno v:
Mon.Not.Roy.Astron.Soc.307:529-536,1999
In hierarchical cosmologies the evolution of galaxy clustering depends both on cosmological quantities such as Omega and Lambda, which determine how dark matter halos form and evolve, and on the physical processes - cooling, star formation and feedba
Externí odkaz:
http://arxiv.org/abs/astro-ph/9809168
Autor:
Colberg, Joerg M., White, Simon D. M., MacFarland, Thomas J., Jenkins, Adrian, Frenk, Carlos S., Pearce, F. R., Evrard, August E., Couchman, H. M. P., Efstathiou, George, Peacock, John A., Thomas, Peter A.
We report on analyses of cluster samples obtained from the Hubble Volume Simulations. These simulations, an $\Omega=1$ model named $\tau$CDM and a flat low $\Omega$ model with a cosmological constant ($\Lambda$CDM), comprise the largest computational
Externí odkaz:
http://arxiv.org/abs/astro-ph/9808257
We introduce a new technique for following the formation and evolution of galaxies in cosmological N-body simulations. Dissipationless simulations are used to track the formation and merging of dark matter halos as a function of redshift. Simple pres
Externí odkaz:
http://arxiv.org/abs/astro-ph/9805283
The gravitational lens effect of galaxy clusters can produce large arcs from source galaxies in their background. Typical source redshifts of ~ 1 require clusters at z ~ 0.3 for arcs to form efficiently. Given the cluster abundance at the present epo
Externí odkaz:
http://arxiv.org/abs/astro-ph/9709229