Is Lambda CDM an effective CCDM cosmologdy?
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNIFESP |
Texto Completo: | https://repositorio.unifesp.br/handle/11600/57832 http://dx.doi.org/10.1088/1475-7516/2016/03/027 |
Resumo: | We show that a cosmology driven by gravitationally induced particle production of all non-relativistic species existing in the present Universe mimics exactly the observed flat accelerating Lambda CDM cosmology with just one dynamical free parameter. This kind of scenario includes the creation cold dark matter (CCDM) model [15] as a particular case and also provides a natural reduction of the dark sector since the vacuum component is not needed to accelerate the Universe. The new cosmic scenario is equivalent to Lambda CDM both at the background and perturbative levels and the associated creation process is also in agreement with the universality of the gravitational interaction and equivalence principle. Implicitly, it also suggests that the present day astronomical observations cannot be considered the ultimate proof of cosmic vacuum effects in the evolved Universe because Lambda CDM may be only an effective cosmology. |
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Lima, J. A. S.Santos, R. C. [UNIFESP]Cunha, J. V.2020-08-21T17:00:00Z2020-08-21T17:00:00Z2016Journal Of Cosmology And Astroparticle Physics. Bristol, v. , n. 3, p. -, 2016.1475-7516https://repositorio.unifesp.br/handle/11600/57832http://dx.doi.org/10.1088/1475-7516/2016/03/027WOS000375608200029.pdf10.1088/1475-7516/2016/03/027WOS:000375608200029We show that a cosmology driven by gravitationally induced particle production of all non-relativistic species existing in the present Universe mimics exactly the observed flat accelerating Lambda CDM cosmology with just one dynamical free parameter. This kind of scenario includes the creation cold dark matter (CCDM) model [15] as a particular case and also provides a natural reduction of the dark sector since the vacuum component is not needed to accelerate the Universe. The new cosmic scenario is equivalent to Lambda CDM both at the background and perturbative levels and the associated creation process is also in agreement with the universality of the gravitational interaction and equivalence principle. Implicitly, it also suggests that the present day astronomical observations cannot be considered the ultimate proof of cosmic vacuum effects in the evolved Universe because Lambda CDM may be only an effective cosmology.FAPESPCNPqCAPES (LLAMA project)CAPES (INCT-A project)CAPES (PROCAD project)Univ Sao Paulo, Dept Astron, Rua Matao 1226, BR-05508900 Sao Paulo, SP, BrazilUniv Fed Sao Paulo, Dept Ciencias Exatas & Terra, BR-09972270 Diadema, SP, BrazilFed Univ Para, Fac Fis, BR-66075110 Belem, Para, BrazilUniv Fed Sao Paulo, Dept Ciencias Exatas & Terra, BR-09972270 Diadema, SP, BrazilWeb of Science-engIop Publishing LtdJournal Of Cosmology And Astroparticle Physicsdark matter theorygalaxy clusteringIs Lambda CDM an effective CCDM cosmologdy?info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleBristol3info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UNIFESPinstname:Universidade Federal de São Paulo (UNIFESP)instacron:UNIFESPORIGINALWOS000375608200029.pdfapplication/pdf218311${dspace.ui.url}/bitstream/11600/57832/1/WOS000375608200029.pdf1a81a91c43f8de6d1229f87e734b0213MD51open accessTEXTWOS000375608200029.pdf.txtWOS000375608200029.pdf.txtExtracted texttext/plain27092${dspace.ui.url}/bitstream/11600/57832/8/WOS000375608200029.pdf.txt1e9c8e5c7300c139d548368f57ee7a9dMD58open accessTHUMBNAILWOS000375608200029.pdf.jpgWOS000375608200029.pdf.jpgIM Thumbnailimage/jpeg5758${dspace.ui.url}/bitstream/11600/57832/10/WOS000375608200029.pdf.jpg798da8cc07c7b1ec108e1f44a37b0cdeMD510open access11600/578322023-06-05 19:12:50.799open accessoai:repositorio.unifesp.br:11600/57832Repositório InstitucionalPUBhttp://www.repositorio.unifesp.br/oai/requestopendoar:34652023-06-05T22:12:50Repositório Institucional da UNIFESP - Universidade Federal de São Paulo (UNIFESP)false |
dc.title.en.fl_str_mv |
Is Lambda CDM an effective CCDM cosmologdy? |
title |
Is Lambda CDM an effective CCDM cosmologdy? |
spellingShingle |
Is Lambda CDM an effective CCDM cosmologdy? Lima, J. A. S. dark matter theory galaxy clustering |
title_short |
Is Lambda CDM an effective CCDM cosmologdy? |
title_full |
Is Lambda CDM an effective CCDM cosmologdy? |
title_fullStr |
Is Lambda CDM an effective CCDM cosmologdy? |
title_full_unstemmed |
Is Lambda CDM an effective CCDM cosmologdy? |
title_sort |
Is Lambda CDM an effective CCDM cosmologdy? |
author |
Lima, J. A. S. |
author_facet |
Lima, J. A. S. Santos, R. C. [UNIFESP] Cunha, J. V. |
author_role |
author |
author2 |
Santos, R. C. [UNIFESP] Cunha, J. V. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Lima, J. A. S. Santos, R. C. [UNIFESP] Cunha, J. V. |
dc.subject.eng.fl_str_mv |
dark matter theory galaxy clustering |
topic |
dark matter theory galaxy clustering |
description |
We show that a cosmology driven by gravitationally induced particle production of all non-relativistic species existing in the present Universe mimics exactly the observed flat accelerating Lambda CDM cosmology with just one dynamical free parameter. This kind of scenario includes the creation cold dark matter (CCDM) model [15] as a particular case and also provides a natural reduction of the dark sector since the vacuum component is not needed to accelerate the Universe. The new cosmic scenario is equivalent to Lambda CDM both at the background and perturbative levels and the associated creation process is also in agreement with the universality of the gravitational interaction and equivalence principle. Implicitly, it also suggests that the present day astronomical observations cannot be considered the ultimate proof of cosmic vacuum effects in the evolved Universe because Lambda CDM may be only an effective cosmology. |
publishDate |
2016 |
dc.date.issued.fl_str_mv |
2016 |
dc.date.accessioned.fl_str_mv |
2020-08-21T17:00:00Z |
dc.date.available.fl_str_mv |
2020-08-21T17:00:00Z |
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info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/article |
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publishedVersion |
dc.identifier.citation.fl_str_mv |
Journal Of Cosmology And Astroparticle Physics. Bristol, v. , n. 3, p. -, 2016. |
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https://repositorio.unifesp.br/handle/11600/57832 http://dx.doi.org/10.1088/1475-7516/2016/03/027 |
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1475-7516 |
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WOS000375608200029.pdf |
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10.1088/1475-7516/2016/03/027 |
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WOS:000375608200029 |
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Journal Of Cosmology And Astroparticle Physics. Bristol, v. , n. 3, p. -, 2016. 1475-7516 WOS000375608200029.pdf 10.1088/1475-7516/2016/03/027 WOS:000375608200029 |
url |
https://repositorio.unifesp.br/handle/11600/57832 http://dx.doi.org/10.1088/1475-7516/2016/03/027 |
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eng |
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Journal Of Cosmology And Astroparticle Physics |
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- |
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Bristol |
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Iop Publishing Ltd |
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Iop Publishing Ltd |
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