The Dependence of Dark Halo Clustering on Formation Epoch and Concentration Parameter
نویسندگان
چکیده
منابع مشابه
The dependence of dark halo clustering on the formation epoch and the concentration parameter
We examine the age-dependence of dark matter halo clustering in an unprecedented accuracy using a set of 7 high-resolution cosmological simulations each with N = 1024 particles. We measure the bias parameters for halos over a large mass range using the cross-power-spectrum method that can effectively suppress the random noise even in the sparse sampling of the most massive halos. This enables u...
متن کاملEnvironmental Dependence of Cold Dark Matter Halo Formation
We use a high-resolution N -body simulation to study how the formation of cold dark matter (CDM) halos is affected by their environments, and how such environmental effects produce the age-dependence of halo clustering observed in recent N -body simulations. We estimate, for each halo selected at redshift z = 0, an ‘initial’ massMi defined to be the mass enclosed by the largest sphere which con...
متن کاملformation and evolution of regional organizations: the case study of the economic cooperation organization (eco)
abstract because of the many geopolitical, geo economical and geo strategically potentials and communicational capabilities of eco region, members can expand the convergence and the integration in base of this organization that have important impact on members development and expanding peace in international and regional level. based on quality analyzing of library findings and experts interv...
15 صفحه اولThe age dependence of halo clustering
We use a very large simulation of the concordance ΛCDM cosmogony to study the clustering of dark matter haloes. For haloes less massive than about 10hM⊙ the amplitude of the two-point correlation function on large scales depends strongly on halo formation time. Haloes that assembled at high redshift are substantially more clustered than those that assembled more recently. The effect is a smooth...
متن کاملDark matter halo occupation: environment and clustering
We use a large dark matter simulation of a cold dark matter ( CDM) model to investigate the clustering and environmental dependence of the number of substructures in a halo. Focusing on redshift z = 1, we find that the halo occupation distribution is sensitive at the tens of per cent level to the surrounding density and to a lesser extent to asymmetry of the surrounding density distribution. We...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2007
ISSN: 0004-637X,1538-4357
DOI: 10.1086/511130