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

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Martins, CJAP (Author) Other

Journal

Title: Journal of Cosmology and Astroparticle Physics

Vol. 2012

Pages: 013-013

ISSN: 1475-7516

Publisher: Institute of Physics Publishing

Indexing

ISI Web of Knowledge - 18 Citations

Scopus - 16 Citations

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 27