DEPENDENCE OF UNIVERSE DECELERATION PARAMETER ON COSMOLOGICAL CONSTANT: MECHANISM OF VACUUM PRESSURE EXCITATION BY MATTER

Based on Sakharov's idea of a 'metrical elasticity' of space, i.e., of the emergence of a generalized force, preventing distortion of space, we detect the pressure of the vacuum as per the geometry of the space around the local gravity system. The gravitational defect of mass is interpreted as the transfer of energy to the vacuum, which becomes apparent from its deformation. We determine the gravitational impact of matter on the vacuum and opposite in the sign pressure of it in case of weakly gravitating static centrally symmetric distribution of matter using appropriate solution of Einstein's equations. A possibility to extend the obtained results to arbitrary gravitational systems is evaluated. A non-conservation of energy in gravitational systems is interpreted by the Extended Space Model (ESM) as the rotation of the energy-momentum vector in 5-dimensional space. A proposed approach to determining pressure as a source of gravity leads to a revision of the dependence of the deceleration parameter of the Universe on the density parameters. Under this condition we examine the ratio between the density parameters of dark energy and cosmological constant depending on the deceleration parameter.