A5101512796- Cosmology and Gravitation Theories
- Galaxies: Formation, Evolution, Phenomena
- Geophysics and Gravity Measurements
- Astronomy and Astrophysical Research
- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- Relativity and Gravitational Theory
- Black Holes and Theoretical Physics
- Pulsars and Gravitational Waves Research
- Radio Astronomy Observations and Technology
- Dark Matter and Cosmic Phenomena
- Solar and Space Plasma Dynamics
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Scientific Research and Discoveries
- Adaptive optics and wavefront sensing
- Geomagnetism and Paleomagnetism Studies
- Water Quality Monitoring and Analysis
- Metamaterials and Metasurfaces Applications
- Education and Professional Development
- Educational Innovations and Challenges
- Stochastic processes and financial applications
- Computational Physics and Python Applications
- High-pressure geophysics and materials
- Earth Systems and Cosmic Evolution
Astro Space Center
2011-2024
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
2001-2024
Centre de Recherche sur l'Hétéro-Epitaxie et ses Applications
2022-2023
Russian Academy of Sciences
2007-2022
Helmholtz-Zentrum Hereon
2020
Universität Hamburg
2020
Moscow Institute of Physics and Technology
2018
St Petersburg University
2014
Universidade Federal de Juiz de Fora
2012
Space Research Institute
2008
This paper describes outstanding issues in astrophysics and cosmology that can be solved by astronomical observations a broad spectral range from far infrared to millimeter wavelengths.The discussed problems related the formation of stars planets, galaxies interstellar medium, studies black holes development cosmological model addressed planned space observatory Millimetron (the "Spectr-M" project) equipped with cooled 10-m mirror.Millimetron operate both as single-dish telescope part...
ABSTRACT Modified matter power spectra with approximately Gaussian bump on sub-Mpc scales can be a result of complex inflation. We consider five different amplitudes A and locations k0 run N-body simulations in cube (5 Mpc h−1)3 at z > 8 to reveal the halo mass functions their evolution redshift. have found that Sheth–Tormen formula provides good approximation such kind functions. In considered models, dark formation starts much more earlier than Lambda cold (ΛCDM), which turn an star...
This paper describes outstanding issues in astrophysics and cosmology that can be solved by astronomical observations a broad spectral range from far infrared to millimeter wavelengths. The discussed problems related the formation of stars planets, galaxies interstellar medium, studies black holes development cosmological model addressed planned space observatory Millimetron (the "Spectr-M" project) equipped with cooled 10-m mirror. operate both as single-dish telescope part space-ground...
We discuss various aspects of the inner structure formation in virialized dark matter (DM) halos that form as primordial density inhomogeneities evolve cosmological standard model. The main focus is on study central cusps/cores and profiles DM halo rotation curves, problems reveal disagreements among theory, numerical simulations, observations. A method was developed by authors to describe equilibrium systems presented, which allows investigating these complex nonlinear structures...
In this review, the formation, evolution, and decay of large-scale structure Universe is discussed in context observational data, numerical simulation, Cosmological Standard Model (CSM). Problems concerning measuring interpreting cosmological parameters, determining composition matter, normalizing density perturbation spectra are especially highlighted.
We discuss status of the singularity problem in General Relativity and argue that requirement a physical solution must be completely free singularities may too strong.As an example, we consider properties integrable show they represent light horizons separating T-regions black white holes.Connecting astrophysical hole to hole, lead natural mechanism generating new universes.Under favorable conditions universes will also contain holes which, their turn, give rise another generation...
We review different approaches to the problem of generating observed Hubble flow, whose discussion was pioneered by A.D. Sakharov. Extrapolating Cosmological Standard Model past makes it possible determine physical properties and conditions in early universe. discuss a new cosmogenesis paradigm based on studying geodesically complete geometries black/white holes with integrable singularities.
Abstract We present a theoretical description of different types accretion disks and jets near supermassive black holes (SMBHs) that can be observed in the (sub)millimeter wave band. Special attention is paid to possible formation shadow hole illuminated by an disk or jet. suggest simple criterion for identifying such current planned SMBH observations using very long baseline interferometry (VLBI). As example, we propose number potential candidates satisfying this with future Millimetron...
A surprisingly large number of galaxies with masses $\sim10^9-10^{10}M_\odot$ at redshifts $z\geq9$ are discovered the James Webb Space Telescope. possible explanation for increase in mass function can be presence a local maximum (bump) power spectrum density perturbations on corresponding scale. In this paper, it is shown that simultaneously growth function, from bump region must have higher (compactness) compared to cosmological models without bump. These more compact been partially...
In this review, the formation, evolution, and decay of large-scale structure Universe is discussed in context observational data, numerical simulations, Cosmological Standard Model (CSM). Problems concerning measuring interpreting cosmological parameters, determining composition matter, normalizing density perturbation spectra are especially highlighted.
К решению проблем каспов и кривых вращения в гало тёмной материи космологической стандартной модели, Дорошкевич А.Г., Лукаш В.Н., Михеева Е.В.
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This work investigates a set of cosmological collisionless N-body simulations with featured power spectra initial perturbations in the context core-cusp and satellites problems. On studied some scales fluctuations were suppressed. Such spectral features can be caused by multicomponent dark matter. The density profiles innermost resolved slopes $α\equiv d \log(ρ) /d \log(r) $ five largest haloes measured its dependence on parameters suppression was traced. In certain range flatten from value...
Abstract We discuss key physical problems related to the interstellar and intergalactic medium, which are subject of far infrared (FIR) submillimeter (submm) astronomy. outline most impressive results last 25 years summarize characteristics successful space ground-based FIR submm observatories: those currently in operation, already inoperative, or under development. A brief discussion is given concerning evolution gaseous medium galaxies, their vicinity, whose solution can rely on critically...
With help of a set toy N-body models dark halo formation we study the impact small scale initial perturbations on inner density profiles haloes. We find significant flattening slope $\alpha={d \log \rho \over d r}$ to $\alpha=-0.5$ in some range scales and amplitudes (while case absence these NFW profile with $\alpha=-1$ is reproduced). This effect may be responsible for cuspless galactic
We propose a solution of the cusp problem in framework standard $\Lambda$CDM cosmology. To do this we describe linear and nonlinear periods halo formation by entropy function dark matter particles. This approach allows us to take into account together impact both processes relaxation compressed small scale initial velocity perturbations collapsed halos. show that such random velocities lead variations density profile relaxed As rule, they suppress cusp--like halos favor creation core--like...
We discuss the problem of singularities in general relativity and emphasize distinction that should be made between what is understood to mathematical physical singularities. revise examples space-times conventionally contain a singularity which, sense, does not manifest itself physically. A special attention paid case integrable for which we propose well-defined procedure used extend space-time beyond singularity. argue this type may connect interior black hole with newly born universe (a...
A scientific session of the Physical Sciences Division Russian Academy (RAS) was held on April 25, 2007 in Conference Hall P N Lebedev Institute, RAS. The following reports were presented at session. (1) Novikov I D, Kardashev S, Shatskii (Astro-Cosmic Center, RAS, Moscow) multicomponent Universe and astrophysics wormholes; (2) Lukash V N, Mikheeva E Dark matter: from initial conditions to structure formation Universe. An abridged version these is given below. • wormholes, D Novikov, S...