Constraints on the redshift of reionization from CMB data
Astrophysics
2007-05-23 v1
Abstract
We use the recent CMB power spectrum measurement by the Maxima experiment (Hanany et al. 2000) to constrain the redshift of reionization z_re. This becomes possible by combining the CMB data with cosmological parameters from various independent measurements, including Big Bang Nucleosynthesis (BBN) and X-ray cluster data. Most notably, our results provide a robust lower bound on z_re. We find that z_re>15 (8) at the 68% (95%) confidence level, unless the Hubble constant is larger than 75 km/s/Mpc.
Cite
@article{arxiv.astro-ph/0010063,
title = {Constraints on the redshift of reionization from CMB data},
author = {Jens Schmalzing and Jesper Sommer-Larsen and Martin Goetz},
journal= {arXiv preprint arXiv:astro-ph/0010063},
year = {2007}
}
Comments
7 pages, 4 figures, uses emulateapj5.sty. Submitted to the Astrophysical Journal Letters