We study the dependence of galaxy contents within halos on halo formation time using two galaxy formation models, one being a semi-analytic model utilizing halo assembly history from a high resolution N-body simulation and the other being a smoothed particle hydrodynamics simulation including radiative cooling, star formation, and energy feedback from galactic winds. We confirm the finding by G...

In August 2015, the Curiosity Mars rover discovered tridymite, a high-temperature silica polymorph, in Gale crater. The existing model for its occurrence suggests erosion and detrital sedimentation from silicic volcanic rocks crater rim or central peak. chemistry mineralogy of tridymite-bearing rocks, however, are not consistent with material. Using data Curiosity, including chemical compositio...

Abstract. In this work we have performed a detailed study of vectors to ore representative volcanic-rock-hosted replacive volcanogenic massive sulfide (VMS) deposit located in the northern Iberian Pyrite Belt (Spain), Aguas Teñidas deposit. The investigated include following: (1) mineralogical zoning, (2) host sequence characterization and mineralized unit identification based on whole rock geo...

We give a review of different properties of dark matter halos. Taken from different publications, we present results on (1) the mass and velocity functions, (2) density and velocity profiles, and (3) concentration of halos. The results are not sensitive to parameters of cosmological models, but formally most of them were derived for popular flat ΛCDM model. In the range of radii r = (0.005 − 1)...

I present an analysis of the density shapes of dark matter halos in ΛCDM and ΛWDM cosmologies. The main results are derived from a statistical sample of galaxy-mass halos drawn from a high resolution ΛCDM N-body simulation. Halo shapes show significant trends with mass and redshift: low-mass halos are rounder than high mass halos, and, for a fixed mass, halos are rounder at low z. Contrary to p...

We investigate the spin alignment of dark matter halos by considering a mechanism somewhat similar to tidal locking. dubbed it Tidal Locking Theory (TLT). While Torque is responsible for initial angular momentum halos, locking explains evolution during non-linear ages. Our previous work showed that close encounters between haloes could drastically change their momentum. The current manuscript a...

3 Department of Physics, Govt. New Science College, Rewa, (M.P.), 486001, INDIA; __________________________________________________________________________________________ Abstract: Based on SOHO/LASCO catalogue and solar geophysical data, we studied the geoeffectiveness, solar source and flare association of a set of 397 halo CMEs during the period of 1996 to 2008. We find that Disk halos are ...

In this paper we study the angular momentum properties of simulated dark matter halos at high redshift that likely host the first stars in the Universe. Calculating the spin distributions of these 10 − 10 M⊙ halos in redshift slices from z = 15 − 6, we find that they are well fit by a log-normal distribution as is found for lower redshift and more massive halos in earlier work. We find that bot...

We use N-body simulations to study properties of dwarf halos with virial masses in the range 10 − 10hM⊙. Unlike recent reported results, we find that the density profiles of relaxed dwarf halos are well fitted by the NFW profile and do not have cores. We estimate the distribution of concentrations for halos in mass range that covers six orders of magnitude from 10 hM⊙ to 10 13 hM⊙, and find tha...