Cosmology and Astrometry

Astronomy Reports - It has recently become clear that the potential role of astrometry in cosmological studies has been underestimated. Some areas of cosmology that should be investigated using...     

Cosmic string detection in radio surveys

We consider the detection of cosmic strings using observations of the anisotropy of the Cosmic Microwave Background. Several methods for detecting cosmic strings are analyzed, using a threshold filter and expansion in orthogonal Haar functions. Computer simulation provides estimates of the noise present in experiments aimed at detection of cosmic strings. Attempts to detect cosmic strings were carried out using the full-sky ILC map obtained as a result of the WMAP space mission. A list of cosmic string candidates has been compiled using the Haar function method.     

The Volcanogenic Tsunami on January 15, 2022, Based on the Records of Deep-Ocean DART Stations

Doklady Earth Sciences - The manifestations of the Hunga Tonga–Hunga Haʻapai volcano explosive eruption on January 15, 2022, in the Pacific region were investigated using the data of the...     

Binary stars as sources of monochromatic gravitational waves

Binary stars are considered as possible sources of monochromatic gravitational waves. The amplitude of corrections to the metric generated by such sources is discussed. Three systems that have amplitudes for stresses of the metric exceeding 10^?20 are identified (V1182 Aql, V3903 Sgr, and DH Cep).     

Calculation of the initial elevation at the tsunami source using analytical solutions

We have obtained an analytical solution to the problem of determining the initial elevation at the tsunami source, which was formed by small residual deformations of a flat sloping bottom. This solution, which is newly derived, is compared with the known analytical solution of an equivalent problem over a horizontal bottom. It is shown that applying an analytical solution over a horizontal bottom for calculating the initial perturbations in the sources of realistic tsunami provides sufficient accuracy.     

“Carte du Ciel” Catalogs and Their Importance for Modern Astrometry

Astronomy Reports - Astronomical catalogs created as a result of the “Carte du Ciel” project are considered, including the work of K.V. Kuimov in this area, its methodological...     

Relativistic Reductions in Distance Measurements between Spacecraft with Picometer Accuracy

Astronomy Reports - A near-Earth gravity experiment is considered in which a pair of satellites exchange laser signals. As a concrete example, numerical estimates were made using the satellite...     

Relativistic Reductions in High-Precision Measurements of the Earth’s Global Gravity Field Using a Multipair Constellation

Astronomy Reports - The theory of relativistic reductions for future challenges of space gravimetry with target accuracy of up to 1 picometer is developed in this paper.     

Konstantin Vladislavovich Kuimov

The conference “Modern Astrometry 2017,” which took place on Octobr 23–25, 2017 at the Sternberg Astronomical Institute of Lomonosov Moscow State University, was dedicated to the memory of the eminent astrometrist, teacher, and outstanding scientist and Doctor of Physical–Mathematical Siences Konstantin Vladslavovich Kuimov, who worked at the Sternberg Astronomical Institute during 1962–2017. This article is based on a presentation made at this conference.