Formation of the First Systems in the Wakes of Moving Cosmic Strings

Details Formation of the First Systems in the Wakes of Moving Cosmic Strings Formation of the First Systems in the Wakes of Moving Cosmic Strings

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pthph..77.1152h&link_type=abstract

Progress of Theoretical Physics, Vol. 77, No. 5, pp. 1152-1162

Physics

18

Scientific paper

Since particles receive the velocity behind moving cosmic strings, wakes are formed from dark matter and baryonic matter. These wakes will fragment into the first systems of mass M =~ 10(7) (Gmu /10(-6})({3)) (betast gammast)(3) (1+zi)(1.5) /(1+zf)(3) Msun, where zi, zf, mu, betast and gammast are the epoch the cosmic string traverse, the epoch the fragmentation occurs, the line density, the velosity of the strings and gammast=(1-beta(2}st)({-1/2)) in units of c=1. The shock waves in the baryonic matter appear in the wakes after the epoch z =~ 790(Gmubetastgammast/10(-6) ). The baryon gas clouds may contract due to H2 cooling after z =~ 10(2) and Population III stars with masses of 10(-1) ~ 10(2}M_{sun) may be fragmented within such first sysetms. The effects of such Population III stars on the surrounding space are briefly discussed.

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