Zobrazeno 1 - 10
of 14
pro vyhledávání: '"R.F. vom Marttens"'
Publikováno v:
Revista Brasileira de Ensino de Física, Vol 34, Iss 1, Pp 1-9
As estruturas observadas no universo (galáxias, aglomerados e superaglomerados de galáxias) são resultados da instabilidade gravitacional. Esta instabilidade amplifica perturbações, originalmente muito pequenas, até o regime não linear. Neste
Externí odkaz:
https://doaj.org/article/81840be1e91d485ca2732c4c729182fd
Publikováno v:
Physics of the Dark Universe. 15:114-124
Yes, but only for a parameter value that makes it almost coincide with the standard model. We reconsider the cosmological dynamics of a generalized Chaplygin gas (gCg) which is split into a cold dark matter (CDM) part and a dark energy (DE) component
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::40af41b9a2fa2b0bdc18da7afa3d0ecb
https://doi.org/10.1016/j.dark.2017.02.001
https://doi.org/10.1016/j.dark.2017.02.001
Publikováno v:
European Physical Journal
European Physical Journal C: Particles and Fields, Vol 78, Iss 5, Pp 1-13 (2018)
European Physical Journal C: Particles and Fields, Vol 78, Iss 5, Pp 1-13 (2018)
Reduced Relativistic Gas (RRG) is a useful approach to describe the warm dark matter (WDM) or the warmness of baryonic matter in the approximation when the interaction between the particles is irrelevant. The use of Maxwell distribution leads to the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::abdd80f14978d600d1dedc5a031f2787
An interaction between dark matter and dark energy, proportional to the product of their energy densities, results in a scaling behavior of the ratio of these densities with respect to the scale factor of the Robertson-Walker metric. This gives rise
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c4faeefa26b3327a8def1d4c194bb86
Publikováno v:
Revista Brasileira de Ensino de Física v.34 n.1 2012
Revista Brasileira de Ensino de Física
Sociedade Brasileira de Física (SBF)
instacron:SBF
Revista Brasileira de Ensino de Física, Vol 34, Iss 1, Pp 1-9
Revista Brasileira de Ensino de Física
Sociedade Brasileira de Física (SBF)
instacron:SBF
Revista Brasileira de Ensino de Física, Vol 34, Iss 1, Pp 1-9
As estruturas observadas no universo (galáxias, aglomerados e superaglomerados de galáxias) são resultados da instabilidade gravitacional. Esta instabilidade amplifica perturbações, originalmente muito pequenas, até o regime não linear. Neste
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9df68a4c68f7406e69b9ce5a7e436680
https://doi.org/10.1590/s1806-11172012000100010
https://doi.org/10.1590/s1806-11172012000100010
Publikováno v:
European Physical Journal C
The observational fact that the present values of the densities of dark energy and dark matter are of the same order of magnitude, $\rho_{de0}/\rho_{dm0} \sim \mathcal{O}(1)$, seems to indicate that we are currently living in a very special period of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d115e65391d24527dfa43d4e496d24c
http://www.openaccessrepository.it/record/9900/files/main.pdf
http://www.openaccessrepository.it/record/9900/files/main.pdf
Publikováno v:
Journal of Cosmology and Astroparticle Physics. 2014:004-004
We consider the perturbation dynamics for the cosmic baryon fluid and determine the corresponding power spectrum for a $\Lambda(t)$CDM model in which a cosmological term decays into dark matter linearly with the Hubble rate. The model is tested by a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2be996f42437d83c6e81582b9fc8c561
https://doi.org/10.1088/1475-7516/2014/08/004
https://doi.org/10.1088/1475-7516/2014/08/004
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