61 citations · 414 across the 42 of their papers we have counts for
21 papers · 1 filter
Dark energy: myths and reality
V. N. Lukash, V. A. Rubakov
We discuss the questions related to dark energy in the Universe. We note that in spite of the effect of dark energy, large-scale structure is still being generated in the Universe…
Cosmological model: from initial conditions to structure formation
V. Lukash
Observational cosmology is on the verge of new discoveries that will change the essence of our world-view. The matter concerns origin of initial conditions and physics of dark matt…
A solution of the cusp problem in relaxed halos of dark matter
E. Mikheeva, A. Doroshkevich, V. Lukash
We propose a solution of the cusp problem in framework of the standard CDM cosmology. To do this we describe the linear and nonlinear periods of halo formation by the entropy fu…
Analytical approximation of the emission line Fe in QSO's spectra
S. V. Repin, V. N. Lukash, V. N. Strokov
In spectra of many Seyfert galaxies there is a wide emission line of Fe . The line profile with two maxima supposes that the line emerges in innermost regions of an accretion…
On the relation between tensor and scalar perturbation modes in Friedmann cosmology
V. N. Lukash
An elementary derivation of the fundamental relation between the tensor and scalar modes of cosmological perturbations in the early universe is given. Statements by L.P.Gr…
Mass function of gravitationally bounded objects in the inhomogeneous Universe
N. A. Arhipova, V. N. Lukash, B. V. Komberg +1
We modify the Press-Schechter formalism to calculate the mass function of gravitationally bounded objects in a local Universe with size Mpc, i.e. separately in voids (…
Magnetic fields in AGNs and microquasars
A. F. Zakharov, N. S. Kardashev, V. N. Lukash +1
Observations of AGNs and microquasars by ASCA, RXTE, Chandra and XMM-Newton indicate the existence of wide X-ray emission lines of heavy ionized elements in their spectra. The emis…
Abundance and evolution of galaxy clusters in cosmological models with massive neutrino
N. A. Arhipova, T. Kahniashvili, V. N. Lukash
The time evolution of the number density of galaxy clusters and their mass and temperature functions are used to constrain cosmological parameters in the spatially flat dark matter…
-Inflation and CMBR Anisotropy
Vladimir N. Lukash
We argue that a -inflation model can ensure large relative contribution of cosmic gravity waves into the at COBE scale preserving at the same time a near scale-invariant…
Generalised inflation with a gravitational wave background
V. N. Lukash, E. V. Mikheeva, V. Muller +1
We propose a Lambda-inflation model which explains a significant part of the COBE signal by primordial cosmic gravitational waves. The primordial density perturbations fulfill both…
Current status of cosmological MDM model
E. V. Mikheeva, V. N. Lukash, N. A. Arkhipova +1
An analysis of cosmological models in spatially flat Friedmann Universe with cosmic gravitational wave background and zero -term is presented. The number of free parameters is e…
A generalized inflation model with cosmic gravitational waves
V. N. Lukash, E. V. Mikheeva, V. Müller +1
We propose a -inflation model which explains a large fraction of the COBE signal by cosmic gravitational waves. The primordial density perturbations fulfil both the contraints o…
Determination of cosmological parameters from large scale structure observations
B. Novosyadlyj, R. Durrer, S. Gottloeber +2
The possibility of determining cosmological parameters on the basis of a wide set of observational data including the Abell-ACO cluster power spectrum and mass function, peculiar v…
Cosmological parameters from large scale structure observations
B. Novosyadlyj, R. Durrer, S. Gottloeber +2
The possibility of determining cosmological parameters on the basis of a wide set of observational data including the Abell-ACO cluster power spectrum and mass function, peculiar v…
Lambda-inflation and CMB anisotropy
V. N. Lukash, E. V. Mikheeva
We explore a broad class of three-parameter inflationary models, called the -inflation, and its observational predictions: high abundance of cosmic gravitational waves consisten…
An analytic approximation of MDM power spectra in four dimensional parameter space
B. Novosyadlyj, R. Durrer, V. N. Lukash
An accurate analytic approximation of the transfer function for the power spectra of primordial density perturbations in mixed dark matter models is presented. The fitting formula…
Observational Constraints for Power-law spectra of Density Perturbations
N. A. Arkhipova, V. N. Lukash, E. V. Mikheeva
We present an analysis of cosmological models with mixed dark matter (spectrum slope of density perturbations , hot dark matter abundance ) i…
Anisotropy of CMB & Cosmological Model
Vladimir N. Lukash
In this brief review I will touch upon the main points and thends of observational and theoretical cosmology, that influence and change today our understanding of the Universe.
The search and investigation of the Large Groups of Quasars
Boris V. Komberg, Andrey V. Kravtsov, Vladimir N. Lukash
Recently, it was suggested that large concentrations or groups of quasars may trace sites of enhanced matter density at medium and high redshifts analogous to how galaxy clusters t…
QUASARS AND LARGE SCALE STRUCTURE OF THE UNIVERSE
V. N. Lukash
The majority of bright distant quasars may form in massive mergers appearing in compact galaxy groups in/and young clusters. The expected tests are (i) large…
The Large-Scale Distribution of Quasars
B. V. Komberg, A. V. Kravtsov, V. N. Lukash
We report the investigation of spatial distribution of quasars using two different methods: the statistical study by means of 2-point correlation function and direct search for str…