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.

Chudaykin A., Gorbunov D., Nedelko N. «Exploring Λ CDM extensions with SPT-3G and Planck data: 4σ evidence for non-zero neutrino masses and implications of extended dark energy models for cosmological tensions» Журнал экспериментальной и теоретической физики, 168, № 6, с. 790-832 (2025)

We present cosmological constraints in the Λ CDM model and a set of its extensions from a dataset based on the polarization and gravitational lensing measurements from the South Pole Telescope and the large-scale (l<1000) part of the Planck CMB temperature measurements. In all cosmological scenarios, this CMB data combination brings the clustering measurements into agreement with the low-redshift probes of large-scale structure, resolving the S8 tension. Combining this CMB set with a full-shape treatment of the BOSS large-scale structure observations, additional BAO measurements, information from weak lensing and photometric galaxy clustering surveys, and the Pantheon supernova catalog, we find a ∼4σ preference for non-zero neutrino mass, ∑√_u=0.221±0.055 eV. We also explore dynamical dark energy in the context of the Hubble tension with two phenomenological late-time approaches introducing a phantom crossing in the dark energy equation of state. For the combination of all data considered, both models predict H₀≃68 km,·s^–1Mpc in ∼3σ tension with the SH0ES constraint, if the supernova absolute magnitude MB is calibrated by CMB and LSS data as a free parameter. While it is possible to achieve H0 values consistent with SH0ES by fixing MB to the Cepheid-derived value, that is shown to not be a valid approach as it introduces an implicit 4.5σ tension between CMB and the local Universe.