Zobrazeno 1 - 10
of 198
pro vyhledávání: '"Pilipenko, S."'
Publikováno v:
Jetp Lett. 120 (2024) 83
A surprisingly large number of galaxies with masses of $\sim10^9-10^{10}M_\odot$ at redshifts of $z\geq9$ are discovered with the James Webb Space Telescope. A possible explanation for the increase in the mass function can be the presence of a local
Externí odkaz:
http://arxiv.org/abs/2409.02739
Publikováno v:
Phys. Rev. D 110, 083530 (2024)
We consider three cosmological models with non-power-law spectra of primordial density perturbations and test them against $\Lambda$CDM in density profiles of dark matter halos. We found that, despite the significant difference in initial conditions,
Externí odkaz:
http://arxiv.org/abs/2407.02991
The initial power spectrum of density perturbations, generated during the inflationary epoch, is now constrained by observations on scales $\lambda>5$~Mpc and has a power-law form. The peculiarities of the inflationary process can lead to the appeara
Externí odkaz:
http://arxiv.org/abs/2404.17803
Publikováno v:
Phys. Rev. D 109, 023523, 2024
We present a signal-foreground separation algorithm for filtering observational data to extract spectral distortions of the cosmic microwave background (CMB). Our linear method, called the least response method (LRM), is based on the idea of simultan
Externí odkaz:
http://arxiv.org/abs/2401.13415
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 $A$ and locations $k_0$ and run N-body simulations in a cube $(5 Mpc/
Externí odkaz:
http://arxiv.org/abs/2307.13774
Autor:
Arakelyan, N. R., Pilipenko, S. V.
Publikováno v:
Astronomy Reports, Volume 66, Issue 3, p.191-199 (2022); Erratum: Astronomy Reports, Volume 66, Issue 4, p.359-359 (2022)
We have studied the system of globular clusters (GCs) that formed in other galaxies and eventually accreted onto the Milky Way. Thus, the samples of GCs belonging to different tidal streams, obtained on the basis of the latest data from the Gaia obse
Externí odkaz:
http://arxiv.org/abs/2301.08535
In this paper we use the model of extragalactic background light to investigate the factors that have influence on the confusion noise. It was shown that (1) Large-Scale Structure of the Universe is an important factor; (2) gravitational lensing does
Externí odkaz:
http://arxiv.org/abs/2111.14679
Autor:
Litvinov, D. A., Pilipenko, S. V.
Publikováno v:
Class. Quantum Grav. 38 135010 (2021)
We consider the problem of testing the Einstein Equivalence Principle (EEP) by measuring the gravitational redshift with two Earth-orbiting stable atomic clocks. For a reasonably restricted class of orbits we find an optimal experiment configuration
Externí odkaz:
http://arxiv.org/abs/2108.09723
Publikováno v:
Astrophysical Bulletin 75 (2020) 394-406
In this work a search was carried out for globular clusters belonging to the Sagittarius (Sgr) tidal stream using the analysis of spatial positions, radial velocities relative to the Galactic Standard of Rest (V_{GSR}),proper motions and ratio of "ag
Externí odkaz:
http://arxiv.org/abs/2105.09850
Publikováno v:
Phys. Rev. D 101 (2020) 123510
We consider the Stokes parameters' frequency spectral distortions arising due to Compton scattering of the anisotropic cosmic microwave background (CMB) radiation, the Sunyaev-Zel' dovich effect (SZ), towards clusters of galaxies. We single out a ver
Externí odkaz:
http://arxiv.org/abs/2006.15571