Galactic magnetic field (GMF) and secondary cosmic rays (CRs) (e.g. 10beryllium, boron, antiproton) are important components to understand the propagation of CRs in the Milky Way Galaxy. Realistic modeling of GMF is based on the Faraday rotation measurements of various Galactic and extragalactic radio sources and synchrotron emission from CR leptons in the radio frequency range, thereby...
Observed galaxies trace an underlying network of gravitationally
dominant dark matter; we know however that they trace it in a biased
way, and that this bias depends on galaxy properties. In many studies
galaxy luminosity and/or galaxy stellar mass is used as a convenient
(even if also biased) proxy of its host dark matter halo; in the same
time it was also observed that clustering of...
Data collected in the measurement of the neutron electric dipole moment (nEDM) were used to look for the ultralow-mass axionlike dark matter. Analysis of ratio of frequencies of spin-precession of ultracold neutrons and 199Hg atoms enabled us to estimate an axion-induced oscillating electric dipole moment of the neutron and an axion-wind spin-precession effect. Our null result sets the first...
Observations show the emission of hard and soft photons at high energies (X-ray or gamma ray) in the black hole accretion flow's spectra. These hard photons are observed at very high frequency which implies that they are produced near black hole horizon. As the quality and quantity of the high energy observations improved over the years, evidence mounted showing that photons must be created in...
