A5007979136- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Astronomical Observations and Instrumentation
- Particle physics theoretical and experimental studies
- Astrophysical Phenomena and Observations
- Relativity and Gravitational Theory
- Gamma-ray bursts and supernovae
- Black Holes and Theoretical Physics
- Neutrino Physics Research
- Radio Astronomy Observations and Technology
- Solar and Space Plasma Dynamics
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Medical Imaging Techniques and Applications
Institute for Nuclear Research
2023-2024
Space Research Institute
2023-2024
National Research University Higher School of Economics
2023-2024
Peoples' Friendship University of Russia
2020
Dark matter sterile neutrinos radiatively decay in the Milky Way, which can be tested with searches for almost monochromatic photons x-ray cosmic spectrum. We analyse data of SRG/ART-XC telescope operated two years all-sky survey mode. With no significant hints Galactic diffuse spectrum we explore models neutrino masses 12--40 keV range and exclude corresponding regions sterile-active mixing.
We present an updated catalog of sources detected by the Mikhail Pavlinsky ART-XC telescope aboard Spektrum-Roentgen-Gamma (SRG) observatory during its all-sky survey. It is based on data first four and partially completed fifth scans sky (ARTSS1-5). The comprises 1545 in 4–12 keV energy band. achieved sensitivity ranges between ~4 × 10 −12 erg s −1 cm −2 near ecliptic plane ~7 −13 poles, which a ~30–50% improvement over previous version two (ARTSS12). There are ~130 objects, excluding...
Bright blazars were found to be prominent neutrino sources, and a number of IceCube events associated with them. Evaluating high-energy photon emission such is crucial for better understanding the processes regions where neutrinos are produced. Here, we focus on hard X-ray observed by SRG/ART-XC telescope, Swift/BAT imager, INTEGRAL/IBIS telescope. Their energy range ~10 keV well-suited probing photons that potentially participate in production interacting ultrarelativistic protons. We find...
We present an updated catalog of sources detected by the Mikhail Pavlinsky ART-XC telescope aboard Spektrum-Roentgen-Gamma (SRG) observatory during its all-sky survey. It is based on data first four and partially completed fifth scans sky (ARTSS1-5). The comprises 1545 in 4-12 keV energy band. achieved sensitivity ranges between $\sim 4\times 10^{-12}$ erg s$^{-1}$ cm$^{-2}$ near ecliptic plane 7\times 10^{-13}$ poles, which a $\sim$30-50% improvement over previous version two (ARTSS12)....
In this paper we present new constraints on velocity-independent cross section of keV-scale mass annihilating Dark Matter particles obtained with SRG/ART-XC after 4 full-sky surveys. These are derived from observations the Milky Way Halo, 33 Local Group spheroidal dwarf (dSph) galaxies and separately for dSph galaxy Ursa Major III/UNIONS 1. The Halo strongest among others all available in literature class models particle masses to 15 keV.
In recent years spinor field is being used by many authors to address some burning issues of modern cosmology. The motive behind using the as a source for gravitational lies on fact that not only can describe different era evolution but also simulate substances such perfect fluid and dark energy. Moreover, very sensitive one depending react differently change spacetime geometry itself differently. This paper provides brief description nonlinear in FriedmannLemaitre-Robertson-Walker (FLRW)...
Dark matter sterile neutrinos radiatively decay in the Milky Way, which can be tested with searches for almost monochromatic photons X-ray cosmic spectrum. We analyse data of SRG/ART-XC telescope operated two years all-sky survey mode. With no significant hints Galactic diffuse spectrum we explore models neutrino masses 12-40 keV range and exclude corresponding regions sterile-active mixing.