Simulations of motions of images of extragalactic sources due to weak gravitational microlensing |
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| Authors: | T A Kalinina M S Pshirkov |
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| Institution: | (1) Sternberg Astronomical Institute, Moscow, Russia |
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| Abstract: | A statistical study of motions of images of distant extragalactic sources, such as quasars on the celestial sphere, due to the action of weak gravitational microlensing is presented. It was assumed that the parallax of the lens was 10 milliarcseconds (mas), the mass of the lens was 1 M ⊙, and the proper motion was µ = 30 mas. The initial point for the motion of the lens (a star in our Galaxy) was taken to be the boundary of a region with a radius of ? = 100 mas and its center coincident with the distant source. The simulations for each trajectory were carried out in steps, with the time step being 0.1 year. The number of sources “launched” over the computational period was 5000. The appearance of the trajectories for the source images is presented; 57% of the total number of sources that participated in the simulations showed motions of 0.7–1.0 mas. |
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