The redshifted HI 21 cm signal from the post-reionization epoch: Cross-correlations with other cosmological probes
arXiv:1610.08181 · doi:10.1007/s12036-016-9404-y
Abstract
Tomographic intensity mapping of the HI using the redshifted 21 cm observations opens up a new window towards our understanding of cosmological background evolution and structure formation. This is a key science goal of several upcoming radio telescopes including the Square Kilometer Array (SKA). In this article we focus on the post-reionization signal and investigate the of cross correlating the 21 cm signal with other tracers of the large scale structure. We consider the cross-correlation of the post-reionization 21 cm signal with the Lyman-alpha forest, Lyman-break galaxies and late time anisotropies in the CMBR maps like weak lensing and the Integrated Sachs Wolfe effect. We study the feasibility of detecting the signal and explore the possibility of obtaining constraints on cosmological models using it.
To appear in Journal of Astrophysics and Astronomy (JOAA) special issue on "Science with the SKA: an Indian perspective"
References in corpus (14)
- Detection of Gravitational Lensing in the Cosmic Microwave Background
- Baryon Acoustic Oscillation Intensity Mapping as a Test of Dark Energy
- Late-time cosmology with 21cm intensity mapping experiments
- Possibility of Precise Measurement of the Cosmological Power Spectrum With a Dedicated 21cm Survey After Reionization
- Clustering Analyses of 300,000 Photometrically Classified Quasars--I. Luminosity and Redshift Evolution in Quasar Bias
- Dark energy and curvature from a future baryonic acoustic oscillation survey using the Lyman-alpha forest
- Blind foreground subtraction for intensity mapping experiments
- An improved measurement of the flux distribution of the Ly-alpha forest in QSO absorption spectra: the effect of continuum fitting, metal contamination and noise properties
- Foregrounds for redshifted 21 cm studies of reionization: GMRT 153 MHz observations
- Cosmological Information from Lensed CMB Power Spectra
- Modeling the neutral hydrogen distribution in the post-reionization Universe: intensity mapping
- A combined analysis of 3D Weak Lensing, Lyman-alpha forest and WMAP year three data
- Estimation of Cosmological Parameters from HI Observations of Post-reionization Epoch
- The CMBR ISW and HI 21-cm Cross-correlation Angular Power Spectrum