Mass density vs. energy density at cosmological scales
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866914741574696960 |
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| author | Eingorn, Maxim Yilmaz, Ezgi Yükselci, A. Emrah Zhuk, Alexander |
| author_facet | Eingorn, Maxim Yilmaz, Ezgi Yükselci, A. Emrah Zhuk, Alexander |
| contents | In the presence of the gravitational field, the energy density of matter no longer coincides with its mass density. A discrepancy exists, of course, also between the associated power spectra. Within the $Λ$CDM model, we derive a formula that relates the power spectrum of the energy density to that of the mass density and test it with the help of N-body simulations run in comoving boxes of 2.816 Gpc/$h$. The results confirm the validity of the derived formula and simultaneously show that the power spectra diverge significantly from one another at large cosmological scales. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_02989 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Mass density vs. energy density at cosmological scales Eingorn, Maxim Yilmaz, Ezgi Yükselci, A. Emrah Zhuk, Alexander General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics In the presence of the gravitational field, the energy density of matter no longer coincides with its mass density. A discrepancy exists, of course, also between the associated power spectra. Within the $Λ$CDM model, we derive a formula that relates the power spectrum of the energy density to that of the mass density and test it with the help of N-body simulations run in comoving boxes of 2.816 Gpc/$h$. The results confirm the validity of the derived formula and simultaneously show that the power spectra diverge significantly from one another at large cosmological scales. |
| title | Mass density vs. energy density at cosmological scales |
| topic | General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2309.02989 |