Abstract We present a method to investigate relativistic effects arising from large masses. The is non-perturbative and employs mean-field approximation gravitational lensing. Using this basic model of disk galaxy, we find that corrections the rotation curves galaxies are significant at galactic radii. predicts strong correlation between inferred dark mass thickness, which verified using two se...

Context. Observations of X-Ray sources harbouring a black hole and an accretion disc show the presence of at least two spectral components. One component is black-body radiation from an optically thick standard accretion disc. The other is produced in a optically thin corona and usually shows a powerlaw behaviour. Electron-proton (ep) bremsstrahlung is one of the contributing radiation mechanis...

This paper discusses relativistic corrections to the thermal Coulomb potential for simple atomic systems. The theoretical description of revealed is carried out within framework quantum electrodymamics (QED). As a result, fine and hyperfine strucutres levels are introduced. theory presented in this based on assumption that atom placed environment created by blackbody radiation (BBR). numerical ...

Relativistic domain walls are studied in the framework of a polynomial approximation to the field interpolating between different vacua and forming the domain wall. In this approach we can calculate evolution of a core and of a width of the domain wall. In the single, cubic polynomial approximation used in this paper, the core obeys Nambu-Goto equation for a relativistic membrane. The width of ...