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We have performed Monte Carlo simulations of the trajectories of several runaway stars using their parallaxes and proper motions from the Gaia EDR3 catalogue. We have confirmed the hypothesis that the stars AE Aur and...
For the first time we have explored the effects of the magnetic field in a nova shell on the escape of positrons from the radioactive isotope...
Based on spectrophotometric observations, we have studied the variable activity of the symbiotic star CH Cyg from 2008 to 2018. The activity of the star was accompanied by a periodic increase of the flux in continuum and spectral lines. In the period of its activity, in both 2015 and 2018,...
The purpose of the present paper is to investigate the motion’s properties of an infinitesimal body in three-dimensional version of Hill’s problem where the mass of the infinitesimal body is supposed to vary with time. As commonly done, the infinitesimal body is assumed to move under the...
The plasma opacity in stars depends mainly on the local state of matter (the density, temperature, and chemical composition at the point of interest), but in supernova ejecta it also depends on the expansion velocity gradient, because the Doppler effect shifts the spectral lines differently in...
The reduction of all the available photometry for the Cepheid SU Sct has allowed its...
The magnetar SGR J1745–2900 located in the vicinity of the supermassive black hole Sgr...
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