Cold + Hot and Cold Dark Matter Cosmologies: Analysis of Numerical Simulations
نویسندگان
چکیده
منابع مشابه
Cold + Hot and Cold Dark Matter Cosmologies: Analysis of Numerical Simulations
We present a series of four simulations of Cold Dark Matter (CDM) and Cold + Hot Dark Matter (CHDM) cosmologies, which we analyze together in this and subsequent papers. These dissipationless simulations were done using the Particle Mesh method with a 5123 mesh, corresponding to a resolution of approximately 200 kpc for an assumed Hubble parameter of H0 = 50 km s 1 Mpc 1, and with approximately...
متن کاملFilament Statistics: A Quantitative Comparison of Cold + Hot and Cold Dark Matter Cosmologies with CfA1 Data
A new class of geometric statistics for analyzing galaxy catalogs is presented. Filament statistics quantify filamentarity and planarity in large scale structure in a manner consistent with catalog visualizations. These statistics are based on sequences of spatial links which follow local high-density structures. From these link sequences we compute the discrete curvature, planarity, and torsio...
متن کاملSimon Hot - dark matter , cold dark matter and accelerating universe
The Friedman equation is solved for a universe containing hot-dark matter and cold dark matter. In this scenario, hot-dark matter drives an accelerating universe no cold dark matter.
متن کاملAxions as hot and cold dark matter
The presence of a hot dark matter component has been hinted at 3σ by a combination of the results from different cosmological observations. We examine a possibility that pseudo Nambu-Goldstone bosons account for both hot and cold dark matter components. We show that the QCD axions can do the job for the axion decay constant fa . O ( 1010 ) GeV, if they are produced by the saxion decay and the d...
متن کاملHidden Hot Dark Matter as Cold Dark Matter
We show that hidden hot dark matter, hidden-sector dark matter with interactions that decouple when it is relativistic, is a viable dark matter candidate provided it has never been in thermal equilibrium with the particles of the standard model. This hidden hot dark matter may reheat to a lower temperature and number density than the visible Universe and thus account, simply with its thermal ab...
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: 1997
ISSN: 0004-637X,1538-4357
DOI: 10.1086/303470