Constraints on the CMB temperature-redshift dependence from SZ and distance measurements

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

Martins, CJAP (Autor) Outra

Revista

Título: Journal of Cosmology and Astroparticle Physics

Vol. 2012

Páginas: 013-013

ISSN: 1475-7516

Editora: Institute of Physics Publishing

Indexação

ISI Web of Knowledge - 18 Citações

Scopus - 16 Citações

Outras Informações

ID Authenticus: P-002-D68

DOI: 10.1088/1475-7516/2012/02/013

Abstract (EN): The relation between redshift and the CMB temperature, T-CMB(z) = T-0(1 + z) is a key prediction of standard cosmology, but is violated in many non-standard models. Constraining possible deviations to this law is an effective way to test the Lambda CDM paradigm and search for hints of new physics. We present state-of-the-art constraints, using both direct and indirect measurements. In particular, we point out that in models where photons can be created or destroyed, not only does the temperature-redshift relation change, but so does the distance duality relation, and these departures from the standard behaviour are related, providing us with an opportunity to improve constraints. We show that current datasets limit possible deviations of the form T-CMB(z) = T-0(1 + z)(1-beta) to be beta = 0.004 +/- 0.016 up to a redshift z similar to 3. We also discuss how, with the next generation of space and ground-based experiments, these constraints can be improved by more than one order of magnitude.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 27