Numerical-analytical modeling of gravitational lensing of the electromagnetic waves in random-inhomogeneous space plasma

Lukyantsev D.S., Afanasiev N.T., Tanaev A.B., Chudaev S.O.
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Instrument of numerical-analytical modeling of characteristics of propagation of electromagnetic waves in chaotic space plasma with taking into account effects of gravitation is developed for interpretation of data of measurements of astrophysical precision instruments of new education. The task of propagation of waves in curved (Riemann’s) space is solved in Euclid’s space by introducing of the effective index of refraction of vacuum. The gravitational potential can be calculated for various model of distribution of mass of astrophysical objects and at solution of Poisson’s equation. As a result the effective index of refraction of vacuum can be evaluated. Approximate model of the effective index of refraction is suggested with condition that various objects additively contribute in total gravitational field. Calculation of the characteristics of electromagnetic waves in the gravitational field of astrophysical objects is performed by the approximation of geometrical optics with condition that spatial scales of index of refraction a lot more wavelength. Light differential equations in Euler’s form are formed the basis of numerical-analytical instrument of modeling of trajectory characteristic of waves. Chaotic inhomogeneities of space plasma are introduced by model of spatial correlation function of index of refraction. Calculations of refraction scattering of waves are performed by the approximation of geometrical optics. Integral equations for statistic moments of lateral deviations of beams in picture plane of observer are obtained. Integrals for moments are reduced to system of ordinary differential equations the firsts order with using analytical transformations for cooperative numerical calculation of arrange and meansquare deviations of light. Results of numerical-analytical modeling of trajectory picture of propagation of electromagnetic waves in interstellar space with taking into account impact of gravitational fields of space objects and refractive scattering of waves on inhomogeneities of index of refraction of surrounding plasma are shown. Based on the results of modeling quantitative estimation of conditions of stochastic blurring of the effect of gravitational lensing of electromagnetic waves at various frequency ranges is performed. It’s shown that operating frequencies of meter range of wavelengths represent conditional low-frequency limit for observational of the effect of gravitational lensing in stochastic space plasma. The offered instrument of numerical-analytical modeling can be used for analyze of structure of electromagnetic radiation of quasar propagating through group of galactic.

Keywords: mathematical modeling, asymptotic decomposition, electromagnetic waves, gravitational field, space plasma, numerical methods, stochastic processes, light approximation
Citation in English: Lukyantsev D.S., Afanasiev N.T., Tanaev A.B., Chudaev S.O. Numerical-analytical modeling of gravitational lensing of the electromagnetic waves in random-inhomogeneous space plasma // Computer Research and Modeling, 2024, vol. 16, no. 2, pp. 433-443
Citation in English: Lukyantsev D.S., Afanasiev N.T., Tanaev A.B., Chudaev S.O. Numerical-analytical modeling of gravitational lensing of the electromagnetic waves in random-inhomogeneous space plasma // Computer Research and Modeling, 2024, vol. 16, no. 2, pp. 433-443
DOI: 10.20537/2076-7633-2024-16-2-433-443
URL: http://crm-en.ics.org.ru/journal/article/3464/
Creative Commons License This work is licensed under a Creative Commons Attribution-NoDerivs 3.0 Unported License.

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