Joint QSO _ CMB constraints on reionization history

7th International Conference on Gravitation and Cosmology

Mitra, S.^1

Harish-Chandra Research Institute, Chhatnag Road, Jhusi, Allahabad 211019, India^1

关键词: Current data;    Markov chain Monte Carlo method;    Model independent;    Reionization;    Semi-analytical approaches;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/484/1/012039/pdf
DOI  :  10.1088/1742-6596/484/1/012039

来源: IOP

【 摘 要 】

We have tried to give an overview of model-independent semi-analytical approach to study the observational constraints on reionization. We have implemented and investigated a method to do a detailed statistical analysis using principal component analysis (PCA) technique. We have also discussed different observations related to reionization and shown how to use PCA for constraining the reionization history. Using Markov Chain Monte Carlo methods, we have found that all the quantities related to reionization can be severely constrained at z6 are still permitted by the current data sets. We have shown that with the forthcoming PLANCK data on large-scale polarization, the z > 6 constraints will be improved considerably.