Context. A significant fraction of the predicted baryons remains undetected in local universe. We adopted common assumption that a large missing corresponds to hot (log T(K) = 5.5-7) phase Warm Hot Intergalactic Medium (WHIM). base our search on scenario whereby WHIM has been heated up via accretion shocks and galactic outflows, is concentrated towards filaments Cosmic Web. Aims. Our aim improv...

We investigate the properties of hybrid gravitational/hydrodynamical simulations, examining both the numerics and the general physical properties of gravitationally driven, hierarchical collapse in a mixed baryonic/dark matter fluid. We demonstrate that, under certain restrictions, such simulations converge with increasing resolution to a consistent solution. The dark matter achieves convergenc...

Lyman-α absorption is a prominent cosmological tool for probing both galactic halos and the intergalactic medium at high redshift. We consider a variety of sources that can be used as the Lyman-α emitters for this purpose. Among these sources, we argue that quasars are the best probes of the evolution of massive halos, while γ-ray bursts represent the cleanest sources for studying the reionizat...

Lyman-α absorption is a prominent cosmological tool for probing both galactic halos and the intergalactic medium at high redshift. We consider a variety of sources that can be used as the Lyman-α emitters for this purpose. Among these sources, we argue that quasars are the best probes of the evolution of massive halos, while γ-ray bursts represent the cleanest sources for studying the reionizat...

We measure the matter power spectrum on small scales from 31 Lyα spectra spanning the redshift range of 1.6-3.6. The optical depth, τ , for Lyα absorption of the intergalactic medium is obtained from the flux using the inversion method of Nusser & Haehnelt (1999). The optical depth is converted to density by using a simple power law relation, τ ∝ (1 + δ)α. The non-linear 1D power spectrum of th...

One considers tachyon repulsive force f from intergalactic space, by Takaaki Musha, as responsible for the rotation speed of galaxies, not due to dark matter. Comparisons are made between this and energy, an possible explanation pioneer anomaly, considering inertial effects being nonlocal upon spacecraft, arising vacuum zero point field ZPF, introduce Mach’s principle effect having on spacecraf...