期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2012/02/013
关键词
cosmology of theories beyond the SM; high redshift galaxies; Sunyaev-Zeldovich effect; baryon acoustic oscillations
资金
- CRUP/British Council [ref. B-13/10]
- PHC-EGIDE [FCT/1562/25/1/2012/S]
- CTC at DAMTP, University of Cambridge
- University of Nottingham
- CNRS at LAL, Centre Scientifique d'Orsay
- Ciencia 2007 Research
- FCT/MCTES (Portugal)
- POPH/FSE (EC)
- [CAUP-03/2011-BII]
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.
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