A5108729298- Cosmology and Gravitation Theories
- Galaxies: Formation, Evolution, Phenomena
- Radio Astronomy Observations and Technology
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Astrophysics and Star Formation Studies
- Black Holes and Theoretical Physics
- Solar and Space Plasma Dynamics
- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Geophysics and Gravity Measurements
- Particle physics theoretical and experimental studies
- Astronomical Observations and Instrumentation
- Scientific Research and Discoveries
- Gamma-ray bursts and supernovae
- Particle Accelerators and Free-Electron Lasers
- Advanced Research in Science and Engineering
- Noncommutative and Quantum Gravity Theories
- Adaptive optics and wavefront sensing
- Advanced X-ray Imaging Techniques
- Particle accelerators and beam dynamics
- Relativity and Gravitational Theory
- Advanced Differential Geometry Research
- Calibration and Measurement Techniques
- Pulsars and Gravitational Waves Research
A. Alikhanyan National Laboratory
2009-2025
Yerevan State University
2009-2025
Krasnoyarsk Scientific Center
2025
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2010
Institut National de Physique Nucléaire et de Physique des Particules
2010
Centre National de la Recherche Scientifique
2010
Laboratoire de Physique Subatomique et de Cosmologie
2010
Université Joseph Fourier
2010
Université Grenoble Alpes
2010
Concern Granit-Electron (Russia)
1992
We used Planck data to study the Virgo Cluster's galaxy M 90 and its surroundings. find, as in case of certain galaxies Local Group vicinity, a substantial temperature asymmetry that probably arises from rotation halo extends up about one degree centre. This is particularly remarkable rare blueshifted Cluster, it thus has possible implications for cluster internal dynamics versus galactic halo's formation structure. Possible explanations observed effect are discussed.
To improve the efficiency of dairy production, it is necessary to pay attention quality rearing young cattle growth and development which depend not only on paratypical, but also genetic factors. The research goal work was identify relationship between leptin gene type (site A80V) changes in live weight indicators cows Kholmogory breed at different age periods. studied livestock included 330 from Arkhangelsk region. whole blood used as biomaterial. results were visualized by electrophoresis...
The Suzuki-Miyaura cross-coupling reaction of ArX (I, Br) with Ar′B(OH)2, catalyzed by Pd-containing water-soluble micelle formed PS-PEO copolymer and N-cetylpyridinium chloride as a surfactant, was studied in water methanol. performed under mild conditions (temperature up to 50 °C) the catalyst can be recycled (5 runs) ultrafiltration without any loss its catalytic activity. phenomenon observed, consisting growing Pd-nanoparticle size because small nanoparticles dissolve form larger course...
The possibility of anisotropies in the speed light relative to limiting electrons is considered. absence sidereal variations energy Compton-edge photons at European Synchrotron Radiation Facility's GRAAL facility constrains such representing first nonthreshold collision-kinematics study Lorentz violation. When interpreted within minimal standard-model extension, this result yields two-sided limit 1.6×10−14 95% confidence level on a combination parity-violating photon and electron...
This paper is a follow-up of previous about the M 82 galaxy and its halo based on Planck observations. As in case 82, substantial north-south east-west temperature asymmetry also found for 81 galaxy, extending up to galactocentric distances 1.5°. The almost frequency independent can be interpreted as Doppler-induced effect related rotation and/or triggered by gravitational interaction galaxies within Group. Along with analogous study several nearby edge-on spiral galaxies, cosmic microwave...
Planck data acquired during the first 15.4 months of observations toward both disk and halo M 31 galaxy were analyzed. We confirm temperature asymmetry that was previously detected by using seven-year WMAP in direction rotation 31, which indicates this is a Doppler-induced effect. The extends to about 10° (≃130 kpc) from center 31. also investigated recent problem raised Rubin Loeb (2014, JCAP, 01, 051) kinetic Sunyaev-Zel'dovich effect diffuse hot gas Local Group, predicted generate spot...
A new map of the sky representing degree randomness in cosmic microwave background (CMB) temperature has been obtained. The based on estimation Kolmogorov stochasticity parameter clearly distinguishes contribution Galactic disk from CMB and reveals regions various degrees that can reflect properties inhomogeneities Universe. For example, among high is southern non-Gaussian anomaly, Cold Spot, with a stratification expected for voids. Existence its counterpart, Northern Spot almost identical...
Planck data towards the galaxy M82 are analyzed in 70, 100 and 143 GHz bands. A substantial north-south East-West temperature asymmetry is found, extending up to 1 degree from galactic center. Being almost frequency-independent, these asymmetries indicative of a Doppler-induced effect regarding line-of-sight dynamics on halo scale, ejections center and, possibly, even tidal interaction with M81 galaxy. The thus acts as model-independent tool reveal bulk nearby edge-on spiral galaxies, like...
Data on the cosmic microwave background (CMB) radiation by Wilkinson Microwave Anisotropy Probe (WMAP) had a profound impact understanding of variety physical processes in early phases Universe and estimation cosmological parameters. Here, 7-year WMAP data are used to trace disk halo nearby giant spiral galaxy M 31. We analyzed temperature excess three bands (W, V, Q) dividing region sky around 31 into several concentric circular areas. An asymmetry mean along direction rotation is observed...
Planck data towards the active galaxy Centaurus A are analyzed in 70, 100 and 143 GHz bands. We find a temperature asymmetry of northern radio lobe with respect to southern one that clearly extends at least up 5° from Cen center diminishes outer regions lobes. That transparent parameter – thus has carry principal information, i.e. indication on line-of-sight bulk motion lobes, while increase smaller radii reveals differential dynamics lobes as expected ejections center.
We used Planck data to study the M33 galaxy and find a substantial temperature asymmetry with respect its minor axis projected onto sky plane. This correlates well HI velocity field at 21 cm, least within galactocentric distance of 0.5 degree, it is found extend up about 3 degrees from center. conclude that revealed effect, is, extension, implies we detected differential rotation extended baryonic halo.
We continue investigation of the hidden plane-mirror symmetry in distribution excursion sets cosmic microwave background (CMB) temperature anisotropy maps, previously noticed three-year data Wilkinson probe (WMAP), using WMAP 5 years maps. The is shown to have higher significance, , for low multipoles while disappearing at larger multipoles, . study sum and difference maps inhomogeneity regions, along with simulated confirms its existence. properties these mirroring symmetries are compatible...
We have studied the angular fluctuations in speed of light with respect to apex dipole Cosmic Microwave Background (CMB) radiation using experimental data obtained GRAAL facility, located at European Synchrotron Radiation Facility (ESRF) Grenoble. The measurements were based on stability Compton edge laser photons scattered 6 GeV monochromatic electron beam. results enable one obtain a conservative constraint anisotropy variations Δc(θ)/c<3×10 -12 , i.e. higher precision than from...
Cosmic microwave background (CMB) radiation is characterized by well-established scales, the 2.7 K temperature of Planckian spectrum and 10-5 amplitude anisotropy. These features were instrumental in indicating hot equilibrium phases early history Universe its large-scale isotropy, respectively. We now reveal one more intrinsic scale CMB properties. introduce a method developed originally Kolmogorov, which quantifies degree randomness (chaos) set numbers, such as measurements given region....
The ellipticity of the anisotropy spots Cosmic Microwave Background measured by Wilkinson Anisotropy Probe (WMAP) has been studied. We find an average about 2, confirming with a far larger statistics similar results found first for COBE-DMR CMB maps, and then BOOMERanG maps. There are no preferred directions obliquity spots. is independent temperature threshold present on scales both smaller than horizon at last scattering. characteristics consistent being effect geodesics mixing occurring...
When the electrons stored in ring of European Synchrotron Radiation Facility (ESRF, Grenoble) scatter on a laser beam (Compton scattering flight) lower energy scattered electron spectra, Compton Edge (CE), is given by two body photon-electron relativistic kinematics and depends velocity light. A precision measurement position this CE as function daily variations direction an absolute reference frame provides one-way test Relativistic Kinematics isotropy The results GRAAL-ESRF measurements...
The Kolmogorov stochasticity parameter is shown to act as a tool detect point sources in the cosmic microwave background (CMB) radiation temperature maps. CMB map constructed for WMAP's 7-year datasets reveals tiny structures which part coincide with radio and Fermi/LAT gamma-ray sources. In first application of this method, we identified several not present then available 0FGL Fermi catalog. Subsequently they were confirmed more recent complete 1FGL catalog, thus strengthening evidence...
The plane-mirror symmetry previously noticed in the Cosmic Microwave Background (CMB) temperature anisotropy maps of Wilkinson Anisotropy Probe is shown to possess certain anomalous properties. degree randomness determined by Kolmogorov stochasticity parameter both regions appears have identical values which, however, essentially differ from corresponding for other sky regions. If mirroring were cosmological origin, this would imply either additional randomizing properties those directions...
Galactic halos are of great importance for our understanding both the dark matter nature and primordial non-Gaussianity in perturbation spectrum, a powerful discriminant physical mechanisms that generated cosmological fluctuations observed today. In this paper we analyze {\it Planck} data towards galaxy M104 (Sombrero) find an asymmetry microwave temperature which extends up to about $1 \degr$ from galactic center. This frequency-independent is consistent with induced by Doppler effect due...
The properties of the Cosmic Microwave Background (CMB) maps carry valuable cosmological information. Here we report results analysis hot and cold CMB anisotropy spots in BOOMERanG 150 GHz map terms number, area, ellipticity, vs. temperature threshold. We carried out this for obtained by summing independent measurement channels (signal plus noise map) a comparison (noise only differencing same channels. areas (spots) have been identified both various thresholds catalog has produced....
We study inhomogeneities in the distribution of excursion sets Cosmic Microwave Background (CMB) temperature maps obtained by three years survey Wilkinson Anisotropy Probe (WMAP). At thresholds |T| = 90 μ K , distributions with over 200 pixels are concentrated two regions, nearly at antipodes, galactic coordinates l 94.7°, b 34.4° and 279.8°, -29.2°. The centers these regions drift towards equator when threshold is increased. located close to one vectors ℓ 3 multipole. patterns substructures...
Laser ranging satellites have proved their efficiency for high precision testing of the effect frame-dragging, one remarkable predictions General Relativity. The analysis randomness properties residuals LAGEOS and 2 reveals role thermal thrust — Yarkovsky on satellite which was in orbit longer period (LAGEOS). We also compute Earth’s tidal modes affecting LARES. recently obtained 5% accuracy limit reached frame dragging based 3.5 year data LARES analyzed together with those using Earth...
The Kolmogorov–Arnold stochasticity parameter technique is applied for the first time to study of cancer genome sequencing, reveal mutations. Using data generated by next-generation sequencing technologies, we have analysed exome sequences brain tumour patients with matched and normal blood. We show that mutations contained in can be revealed using this technique, thus providing a new methodology determining subsequences given length containing mutations, i.e. its value differs from those...
We have measured the ellipticity of several degree scale anisotropies in BOOMERanG maps Cosmic Microwave Background (CMB) at 150 GHz. The average is around 2.6–2.7. biases estimator and for noise are small this case. Large spot elongation had been detected also COBE-DMR WMAP maps. If effect due to geodesic mixing, it would indicate a non-precisely zero curvature Universe which among discussed reasons low multipole anomaly.