Kilic A.I. «Analysis of astrophysical ³⁰Si(n,γ)³¹Si reaction via the asymptotic normalization coefficient method» Письма в ЖЭТФ, 122, № 3, с. 133-135 (2025)

Moiseev A., Gololobov A., Ievenko I., Korsakov A., Petuhov I., Starodubtsev S. «Space weather research in Yakutia» Солнечно-земная физика, 11, № 3, с. 149-159 (2025)

The article reports on the studies of various manifestations of space weather (SW) on Earth, conducted by SHICRA SB RAS at the network of geophysical stations located in Yakutia. It is noted that the Institute researchers study various phenomena occurring in the solar wind and Earth's magnetosphere such as magnetic clouds, Forbush effects, magnetic storms, substorms and associated subauroral glow, as well as high-latitude impulses in the dayside magnetosphere and sudden phase anomalies in the lower ionosphere. In addition to the data from the network of stations in Yakutia, data from other domestic and foreign stations, as well as direct measurements of the parameters of the interplanetary medium and magnetosphere, carried out on various spacecraft, are used to study these phenomena. The paper also describes physical models of magnetic clouds in the solar wind, high-latitude disturbed ionosphere, and methods for short-term forecasting of SW based on cosmic ray (CR) measurements developed at SHICRA SB RAS.

Hughes J.C.M., Kusmartsev F.V. «Topological origin of horizon temperature via the Chern–Gauss–Bonnet theorem» Письма в ЖЭТФ, 122, № 4, с. 199-200 (2025)

This paper establishes a connection between the Hawking temperature of spacetime horizons and global topological invariants, specifically the Euler characteristic of Wick-rotated Euclidean spacetimes. This is demonstrated for both de Sitter and Schwarzschild, where the compactification of the near-horizon geometry allows for a direct application of the Chern–Gauss–Bonnet theorem. For de Sitter, a simple argument connects the Gibbon–Hawking temperature of the Bunch–Davies state to the global thermal de Sitter temperature. This establishes that spacetime thermodynamics are a consequence of the geometrical structure of spacetime itself, therefore suggesting a deep connection between global topology and semi-classical analysis.