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The X-ray emission from the counterparts of historical classical novae (CNe) in our Galaxy is studied. For this purpose, we use data from three SRG/eROSITA sky surveys in the half of the sky for the processing of which the Russian SRG/eROSITA consortium is responsible. Out of 309 historical CNe,...
A linear Ogorodnikov–Milne model is applied to study the three-dimensional kinematics of classical Cepheids in the Milky Way. A sample of 832 classical Cepheids from Mróz et al. (2019) with distances, line-of-sight velocities, and proper motions from the Gaia DR2 catalogue is used. The Cepheid...
The structure of a star composed of locally non-electroneutral incompressible three-component matter is considered within the framework of general relativity. For thermodynamic quantities like the pressure, the solution can be represented as a series in the small parameter...
Observations of giant pulses from the Crab pulsar have been carried out at frequencies of 61 and 111 MHz. The pulse profiles show a significant (nonzero) duration of the leading edge, which is inconsistent with the model of a single thin scattering screen. Several possible variants of the...
WASP-12 b, WASP-33 b, WASP-36 b, and WASP-46 b are four transiting hot Jupiters, which we have studied. These systems’ light curves were derived from observations made by the Transiting Light Exoplanet Survey Satellite (TESS) and some ground-based telescopes. We used Exofast-v1 to model these...
Our statistical analysis (based on Kolmogorov–Smirnov tests) of the mass and radius distributions of planets hosted by stars of different classes reveals their significant differences, depending on the class of host stars. These differences can be explained by (1) the long-term dynamical...
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