Электронный каталог

Статья

Zakharov, A.F.
Astrophysical Tests of General Relativity : Abstract / A.F.Zakharov // Физика элементарных частиц и атомного ядра. – 2024. – Т. 55, № 6 : XXXV Международное (онлайн) совещание по физике высоких энергий «От кварков до галактик: прояснение темных сторон», Протвино, 28 ноября – 1 декабря 2023 г. : Материалы. – P. 1631-1632. – URL: http://www1.jinr.ru/Pepan/v-55-6/06_Zakharov_ann.pdf.

At the initial stage of its development, general relativity (GR) was verified and confirmed in a weak gravitational field limit. However, with the development of astronomical observation technologies, GR predictions in a strong gravitational field, such as the profile of the X-ray iron K&sub(*a) line (in the case if the emission region is very close to the event horizon), the trajectories of stars near black holes and the shapes and sizes of shadows of supermassive black holes in M87* and Sgr A* began to be discussed and confirmed. In 2005, it was predicted that a shadow formed near a supermassive black hole at the Galactic Center could be reconstructed from observations of ground-based global VLBI system or ground-space interferometer acting in millimeter or submillimeter bands. In 2022, this prediction was confirmed since the Event Horizon Telescope (EHT) Collaboration reported about a shadow reconstructions for Sgr A*. In 2019, the EHT Collaboration presented the first image reconstruction around the shadow for the supermassive black hole in M87*. In 2021, the EHT Collaboration constrained parameters (“charges”) of spherical symmetrical metrics of black holes from an allowed interval for shadow radius in M87*. In 2022, the EHT Collaboration constrained charges of metrics for the supermassive black hole at the Galactic Center. Earlier, we obtained analytical expressions for the shadow radius as a function of charge (including a tidal one) in the case of the Reissner–Nordstrom metric. Based on the results of the shadow size evaluation for ¨ M87* done by the EHT Collaboration, we constrained a tidal charge. We discussed opportunities to use shadows to test alternative theories of gravity and alternative theories for Galactic Centers.



Спец.(статьи,препринты) = С 322.1 - Общая теория относительности и гравитация
ОИЯИ = ОИЯИ (JINR)2024