THE EXCURSION SET THEORY OF HALO MASS FUNCTIONS, HALO CLUSTERING, AND HALO GROWTH
نویسندگان
چکیده
منابع مشابه
The Halo Mass Function from Excursion Set Theory with a Non-Gaussian Trispectrum
A sizeable level of non-Gaussianity in the primordial cosmological perturbations may be induced by a large trispectrum, i.e. by a large connected four-point correlation function. We compute the effect of a primordial non-Gaussian trispectrum on the halo mass function, within excursion set theory. We use the formalism that we have developed in a previous series of papers and which allows us to t...
متن کاملThe Halo Mass Function from the Excursion Set Method. Ii. the Diffusing Barrier
This paper is the second of a series of three where we study the mass function of virialized dark matter halos using the excursion set method. Motivated by recent large-scale N-body simulations determining the relation between the density threshold for gravitational collapse and the variance of the linear density field for regions that collapse to form halos by the present epoch, we deduce that...
متن کاملThe clustering of halo mergers
We analyse the spatial distribution of halo merger sites using four numerical simulations with high time resolution of structure growth in a Λ-CDM cosmology. We find no evidence for any large-scale relative bias between mergers and randomly selected haloes of the same mass at high redshift. Given a sample of galaxies that form a Poisson sampling of halo mergers, then the amplitude of the measur...
متن کاملThe Mass-Function of Low Mass Halo Stars: Limits on Baryonic Halo Dark Matter
We derive mass functions for halo red dwarfs (stars just massive enough to burn hydrogen) with varying assumptions about metallicity and about possible unresolved binaries in the sample. The mass functions are obtained from the luminosity function of a sample of 114 local halo stars in the USNO parallax survey (Dahn et al. 1995); we use stellar models of Alexander et al. (1996). We find that th...
متن کاملThe halo by halo missing baryon problem
The global missing baryon problem — that the sum of observed baryons falls short of the number expected form BBN — is well known. In addition to this, there is also a local missing baryon problem that applies to individual dark matter halos. This halo by halo missing baryon problem is such that the observed mass fraction of baryons in individual galaxies falls short of the cosmic baryon fractio...
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: International Journal of Modern Physics D
سال: 2007
ISSN: 0218-2718,1793-6594
DOI: 10.1142/s0218271807010511