October 1, 2025 Dataset Open Access

Akarsu, Özgür; Di Valentino, Eleonora; Vyskocil, Jiri; Yılmaz, Ezgi; Yükselci, A. Emrah; Zhuk, Oleksandr

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  <identifier identifierType="DOI">10.14278/rodare.4499</identifier>
  <creators>
    <creator>
      <creatorName>Akarsu, Özgür</creatorName>
      <givenName>Özgür</givenName>
      <familyName>Akarsu</familyName>
      <affiliation>Istanbul Technical University</affiliation>
    </creator>
    <creator>
      <creatorName>Di Valentino, Eleonora</creatorName>
      <givenName>Eleonora</givenName>
      <familyName>Di Valentino</familyName>
      <affiliation>School of Mathematical and Physical Sciences, University of Sheffield</affiliation>
    </creator>
    <creator>
      <creatorName>Vyskocil, Jiri</creatorName>
      <givenName>Jiri</givenName>
      <familyName>Vyskocil</familyName>
      <nameIdentifier nameIdentifierScheme="ORCID" schemeURI="http://orcid.org/">0000-0001-8822-0929</nameIdentifier>
      <affiliation>HZDR - CASUS</affiliation>
    </creator>
    <creator>
      <creatorName>Yılmaz, Ezgi</creatorName>
      <givenName>Ezgi</givenName>
      <familyName>Yılmaz</familyName>
      <affiliation>Deutsches Zentrum für Astrophysik</affiliation>
    </creator>
    <creator>
      <creatorName>Yükselci, A. Emrah</creatorName>
      <givenName>A. Emrah</givenName>
      <familyName>Yükselci</familyName>
      <affiliation>Istanbul Technical University</affiliation>
    </creator>
    <creator>
      <creatorName>Zhuk, Oleksandr</creatorName>
      <givenName>Oleksandr</givenName>
      <familyName>Zhuk</familyName>
      <affiliation>HZDR - CASUS</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Data: Nonlinear Matter Power Spectrum from relativistic N-body Simulations: ΛsCDM versus ΛCDM</title>
  </titles>
  <publisher>Rodare</publisher>
  <publicationYear>2025</publicationYear>
  <subjects>
    <subject>cosmological N-body simulations</subject>
    <subject>sign switching cosmological constant</subject>
    <subject>matter power spectrum</subject>
  </subjects>
  <dates>
    <date dateType="Issued">2025-10-01</date>
  </dates>
  <language>en</language>
  <resourceType resourceTypeGeneral="Dataset"/>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://rodare.hzdr.de/record/4499</alternateIdentifier>
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  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="URL" relationType="IsIdenticalTo">https://www.hzdr.de/publications/Publ-41918</relatedIdentifier>
    <relatedIdentifier relatedIdentifierType="URL" relationType="IsReferencedBy">https://www.hzdr.de/publications/Publ-42108</relatedIdentifier>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsVersionOf">10.14278/rodare.4019</relatedIdentifier>
    <relatedIdentifier relatedIdentifierType="URL" relationType="IsPartOf">https://rodare.hzdr.de/communities/hzdr</relatedIdentifier>
    <relatedIdentifier relatedIdentifierType="URL" relationType="IsPartOf">https://rodare.hzdr.de/communities/rodare</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="https://creativecommons.org/licenses/by/4.0/legalcode">Creative Commons Attribution 4.0 International</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">&lt;p&gt;Matter power spectra presented in the associated&amp;nbsp;paper are obtained from the datasets separately generated from N-body simulations with the relativistic code&amp;nbsp;&lt;em&gt;gevolution &lt;/em&gt;[1], and from calculations with the linear Boltzmann code CLASS [2], for matching cosmological best-fit parameters and background&amp;nbsp;cosmologies.&amp;nbsp;Regarding the latter element, we study two cases that are the concordance Lambda-Cold Dark Matter (&amp;Lambda;CDM) model and a late-time modification with a sign-switching vacuum sector&amp;nbsp;(&amp;Lambda;sCDM), and for each model there are two best-fit parameter sets, derived from a&amp;nbsp;&lt;em&gt;Planck&lt;/em&gt;-only and a combined &amp;quot;full&amp;quot; dataset.&amp;nbsp;&lt;/p&gt;

&lt;p&gt;P(k) (power spectra) outputs from gevolution are computed at the four redshifts z=15, 2, 1, 0 for the density contrasts of total matter (CDM, baryons, and massive neutrinos) as well as CDM-baryons (cb)-only. A detailed explanation of how the matter sector is handled in simulations is&amp;nbsp;available in the main paper. All runs are carried out in boxes of L=2080 Mpc/h with 0.5 h/Mpc resolution.&lt;/p&gt;

&lt;p&gt;Power spectra based on CLASS outputs are obtained from the transfer functions of CDM and baryons, and the respective background densities at z=15, 2, 1, 0. CLASS dataset for the latter is shown only up to z=100.&lt;/p&gt;

&lt;p&gt;CDM-baryon P(k) outputs with nonlinear corrections from CLASS implementation of HMcode [3] at z=2,1, and 0 are also included in the published data, and have been used in the plots presented in the Appendix of the related manuscript.&amp;nbsp;&lt;/p&gt;

&lt;p&gt;1. J. Adamek, D. Daverio, R. Durrer, and M. Kunz, gevolution: a cosmological N-body code based on General Relativity, JCAP 07, 053. arXiv:1604.06065 [astro-ph.CO].&lt;/p&gt;

&lt;p&gt;2. D. Blas, J. Lesgourgues, and T. Tram, The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes, JCAP 07, 034. arXiv:1104.2933 [astro-ph.CO].&lt;/p&gt;

&lt;p&gt;3. A. J. Mead, C. Heymans, L. Lombriser, J. A. Peacock, O. I. Steele, and H. A. Winther, Accurate halo-model matter power spectra with dark energy, massive neutrinos and modified gravitational forces, Mon. Not. Roy. Astron. Soc. 459, 1468 (2016). arXiv:1602.02154 [astro-ph.CO].&lt;/p&gt;</description>
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