Radiation from Relativistic Electrons in Periodic Structures "RREPS-23" & Electron, Positron, Neutron and X-ray Scattering under External Influences "Meghri-23"

Distributions of quasars as an indicator of the homogeneity or inhomogeneity in the Universe

22 Sept 2023, 10:00

20m

Oral e–/e+, X–ray, THz, and neutron based applications

Speaker

Martik Hovhannisyan (Institute of Applied Problems of Physics NAS RA)

Description

Quasars are perhaps the brightest extragalactic sources, and due to their brightness, they are visible at greater distances. By studying the distribution of quasars in the Universe, it is possible to determine whether there are large-scale inhomogeneities in the Universe or not. If the distribution of quasars is inhomogeneous at large distances, then the same can be stated about the Universe. At small distances, quasars either do not exist, or their number is very small. Therefore, the distribution of quasars at small distances is highly conditional, and we cannot draw any conclusions about the homogeneity of the Universe there.
Therefore, the distribution of quasars allows us to determine the distribution of matter over large distances, which we use to detect large-scale inhomogeneities in the Universe.