Abstract
S M0 ) within the first systems has begun to contract due to Hz cooling, and Population III stars with ~asses of 10- 1 ~ 1il'M0 may be formed by the fragmentation within such systems. The large scale mesh· like traces of moving cosmic strings are superimposed on the structure of the universe and these patterns have simultaneously begun to be luminous at this epoch. The ratio of the accumulated matter in the wakes to the total matter at z 10 z is about 10- 3 • The effects of such Population III stars on the surrounding space by radiative ionizations and shock waves are investigated. The second, third and succeeding baryonic sheets are formed after the isothermal plane shocks. Under moderate parameters, the remaining interwake medium could have been heated up until now. From these sheets, the secondary systems are formed, which may correspond to the globular clusters or dwarf galaxies. The galaxy formation (z:::::8) near wakes and sheets (secondary systems) after heat-up of the universe is briefly discussed.
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