The cross-correlation of redshited 21-cm signal and Lyman-α forest: A cosmological probe

We have investigated the cross-correlation of the Lyman-α forest and redshifted 21-cm emission as a new observational probe of the large scale structures in the post-reionization era, with a significant advantage that the problems of continuum subtraction and foreground removal, and other systematic...

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Bibliographic Details
Published in:Journal of physics. Conference series 2014-01, Vol.484 (1), p.12033-6
Main Authors: Sarkar, T Guha, Bharadwaj, S
Format: Article
Language:English
Subjects:
Acoustic noise
Autocorrelation
Continuums
Covariance
Cross correlation
Emission
Emission analysis
Forests
Formalism
Ionization
Mathematical analysis
Noise prediction
Oscillations
Physics
Subtraction
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Summary:We have investigated the cross-correlation of the Lyman-α forest and redshifted 21-cm emission as a new observational probe of the large scale structures in the post-reionization era, with a significant advantage that the problems of continuum subtraction and foreground removal, and other systematics are expected to be considerably less servere in comparison to the respective auto-correlation signals. In this paper, we have explored the possibility of detecting the baryon acoustic oscillation in the cross-correlation signal. We have developed a formalism to calculate the expected cross-correlation signal and its covariance. We have used this to predict the expected signal and noise for a range of observational parameters.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/484/1/012033