Atıf İçin Kopyala
Eingorn M., Yükselci A. E., Zhuk O.
PHYSICS LETTERS B, cilt.826, 2022 (SCI-Expanded)
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Yayın Türü:
Makale / Tam Makale
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Cilt numarası:
826
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Basım Tarihi:
2022
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Doi Numarası:
10.1016/j.physletb.2022.136911
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Dergi Adı:
PHYSICS LETTERS B
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Derginin Tarandığı İndeksler:
Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, INSPEC, zbMATH, Directory of Open Access Journals
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Anahtar Kelimeler:
N -body simulation, Large-scale structure, Inhomogeneous Universe, Cosmological perturbations, Gevolution, Cosmic screening, EVOLUTION, GALAXIES
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İstanbul Teknik Üniversitesi Adresli:
Evet
Özet
We compare two competing relativistic approaches to the N-body simulation of the Universe large-scale structure. To this end, employing the corresponding alternative computer codes ( "gevolution " and "screening "), we conduct a series of cosmological simulations in boxes of different sizes and calculate the power spectra of the scalar perturbation Phi, the frame-dragging vector potential B and the difference between scalar modes chi=Phi-psi. We demonstrate that the corresponding power spectra are in very good agreement between the compared schemes. For example, the relative difference of the power spectra for Phi is 0.04% maximum. Since the perturbed Einstein equations have much simpler form in the screening approach, the simulation with this code consumes less computational time, saving almost 40% of CPU hours. (C)& nbsp;2022 The Author(s). Published by Elsevier B.V.& nbsp;