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SIMULATION OF STAR FORMATIONS IN COSMOLOGICALVOLUME (240 Mpc/h)3 | ||
| Journal of Al-Nahrain University - Science | ||
| Article 1, Volume 12, Issue 3, 2009, Pages 75-85 | ||
| Authors | ||
| Mudaffer M. Ameen; Mariwan A. Rasheed | ||
| Abstract | ||
| AbstractIn this paper the Lambda Cold Dark Matter (ثCDM) model was used for studyingstar formation inside a box of size (240Mpc/h)3 by simulating eight million dark matter particlesand eight million gas particles together with cosmological density ظ=0.25, dark energydensity ظث=0.75, baryon density ظb=0.04, fluctuation amplitude َ8=0.9 and Hubble constantH0=100h kms-1Mpc-1. The gadget-2 code was used for simulating the particles from early Universe,z=30 (450 million years) to z=0 (13.4 billion years).In the box the structures formation were shown including galaxy clusters, voids and filamentswhich observed clearly at low redshift, z=0.In the temperature-density planes, the thermal processes of cooled gas show the density andtemperature values which were different at each redshift, and the gas cooled in the box at nearly104K caused star formations at certain redshifts. It was also found that stars were formed fromz=7.3 which increased with decreasing redshifts. In addition, the total number of star formed in thebox was 226217 stars.Sixteen processors of high performance supercomputer of Nottingham University-Englandwere used in the simulation. | ||
| Keywords | ||
| Simulation of star formation; simulation in box; Lambda cold dark matter model | ||
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