Busca avançada
Ano de início
Entree
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Testing creation cold dark matter cosmology with the radiation temperature-redshift relation

Texto completo
Autor(es):
Baranov, Iuri P. R. [1, 2, 3] ; Jesus, Jose F. [4, 5] ; Lima, Jose A. S. [1]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Dept Astron, R Matao 1226, BR-05508900 Sao Paulo, SP - Brazil
[2] Inst Fed Parana, R Felipe Tequinha 1400, BR-87703536 Paranavai, PR - Brazil
[3] Inst Fed Educ Ciencia & Tecnol Bahia, Campus Simoes Filho, Via Univ S-N, BR-43700000 Simoes Filho, BA - Brazil
[4] Univ Estadual Paulista Unesp, Campus Expt Itapeva, R Geraldo Alckmin 519, BR-18409010 Itapeva, SP - Brazil
[5] Univ Estadual Paulista Unesp, Fac Engn Guaratingueta, Av Ariberto Pereira da Cunha 333, BR-12516410 Guaratingueta, SP - Brazil
Número total de Afiliações: 5
Tipo de documento: Artigo Científico
Fonte: GENERAL RELATIVITY AND GRAVITATION; v. 51, n. 2 FEB 2019.
Citações Web of Science: 0
Resumo

The standard CDM model can be mimicked at the background and perturbative levels (linear and non-linear) by a class of gravitationally induced particle production cosmology dubbed CCDM cosmology. However, the radiation component in the CCDM model follows a slightly different temperature-redshift T(z)-law which depends on an extra parameter, r, describing the subdominant photon production rate. Here we perform a statistical analysis based on a compilation of 36 recent measurements of T(z) at low and intermediate redshifts. The likelihood of the production rate in CCDM cosmologies is constrained by r=0.024-0.024+0.026(1 sigma confidence level), thereby showing that CDM (r=0) is still compatible with the adopted data sample. Although being hardly differentiated in the dynamic sector (cosmic history and matter fluctuations), the so-called thermal sector (temperature law, abundances of thermal relics and CMB power spectrum) offers a clear possibility for crucial tests confronting CDM and CCDM cosmologies. (AU)

Processo FAPESP: 17/05859-0 - O universo acelerado: natureza e testes da energia escura e matéria escura
Beneficiário:José Fernando de Jesus
Linha de fomento: Auxílio à Pesquisa - Regular