23 citations · 76 across the 11 of their papers we have counts for
12 papers
Do Primordial Black Hole Clusters Survive the Galaxy? Collisional Disruption and Microlensing Implications
M. V. Tkachev, S. V. Pilipenko
We study the collisional disruption of primordial black hole (PBH) clusters in the Milky Way halo. Encounters between clusters strip PBHs into a diffuse component, and the fraction…
Origin of monolithic high-z galaxies and UV luminosity of mergering high-z galaxies in the cosmological model with non-standard spectrum of density perturbations
Yu. N. Eroshenko, V. N. Lukash, E. V. Mikheeva +2
The James Webb Space Telescope (JWST) has detected an unexpectedly large number of galaxies at redshifts compared to the predictions of the standard CDM model. One of…
Constraints on Features in the Cosmological Power Spectrum from Observations of the Epoch of Reionization
O. R. Skorikov, S. V. Pilipenko, M. V. Tkachev
We consider cosmological models with a power spectrum of perturbations featuring an enhanced amplitude on dwarf galaxy scales (with a "bump" or a "tilt"). Early formation of a larg…
High- SMBHs in Cosmological Models with Enhanced Power Spectra
M. V. Tkachev, S. V. Pilipenko, E. V. Mikheeva +1
We consider the impact of non-power-law spectra of matter perturbations with a bump or with a blue tilt at small scales on the evolution of supermassive black holes (SMBHs) located…
On the increase in the concentration of primordial black holes in the halos of dwarf galaxies
S. V. Pilipenko, M. V. Tkachev, N. R. Arakelyan
Through numerical experiments, we have predicted that if dark matter (DM) contains even a small fraction, , of primordial black holes (PBHs), during the formation o…
Properties of Central Regions of the Dark Matter Halos in the Model with a Bump in the Power Spectrum of Density Perturbations
Yu. N. Eroshenko, V. N. Lukash, E. V. Mikheeva +2
A surprisingly large number of galaxies with masses of at redshifts of are discovered with the James Webb Space Telescope. A possible explanation…
Inner structure of dark matter halos at high in cosmological models with non-power-law primordial spectra
M. V. Tkachev, S. V. Pilipenko, E. V. Mikheeva +1
We consider three cosmological models with non-power-law spectra of primordial density perturbations and test them against CDM in density profiles of dark matter halos. We found…
Observations of Galaxies at Allow to Test Cosmological Models with Features in the Initial Power Spectrum
S. V. Pilipenko, S. A. Drozdov, M. V. Tkachev +1
The initial power spectrum of density perturbations, generated during the inflationary epoch, is now constrained by observations on scales ~Mpc and has a power-law form. The p…
Excess of high- galaxies as a test for bumpy power spectrum of density perturbations
M. V. Tkachev, S. V. Pilipenko, E. V. Mikheeva +1
Modified matter power spectra with approximately Gaussian bump on sub-Mpc scales can be a result of a complex inflation. We consider five spectra with different Gaussian amplitudes…
The evolution of a primordial binary black hole due to interaction with cold dark matter and the formation rate of gravitational wave events
Sergey Pilipenko, Maxim Tkachev, Pavel Ivanov
In this Paper we consider a problem of formation and evolution of orbital parameters of a binary primordial black hole (PBH) due to gravitational interaction with clustering cold d…
Dark Matter Simulations with Primordial Black Holes in the Early Universe
Maxim Tkachev, Sergey Pilipenko, Gustavo Yepes
Primordial Black Holes (PBH) with masses of order have been proposed as a possible explanation of the gravitational waves emission events recently discovered by the…
A Model of the Cosmic Infrared Background Produced by Distant Galaxies
S. V. Pilipenko, M. V. Tkachev, A. A. Ermash +3
The extragalactic background radiation produced by distant galaxies emitting in the far infrared limits the sensitivity of telescopes operating in this range due to confusion. We h…