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Baryon Acoustic Oscillation Intensity Mapping of Dark Energy
TLDR
Here it is shown how the study of acoustic oscillation in the 21 cm brightness can be accomplished by economical three-dimensional intensity mapping, and may be the starting point for a new class of dark energy experiments dedicated to large angular scale mapping of the radio sky, shedding light on dark energy.Abstract:
The expansion of the universe appears to be accelerating, and the mysterious anti-gravity agent of this acceleration has been called ``dark energy''. To measure the dynamics of dark energy, Baryon Acoustic Oscillations (BAO) can be used. Previous discussions of the BAO dark energy test have focused on direct measurements of redshifts of as many as $10^9$ individual galaxies, by observing the 21cm line or by detecting optical emission. Here we show how the study of acoustic oscillation in the 21 cm brightness can be accomplished by economical three dimensional intensity mapping. If our estimates gain acceptance they may be the starting point for a new class of dark energy experiments dedicated to large angular scale mapping of the radio sky, shedding light on dark energy.read more
Citations
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Cosmology with intensity mapping techniques using atomic and molecular lines
TL;DR: In this article, the authors present a systematic study of the intensity mapping (IM) technique using updated models for the different emission lines from galaxies and identify which ones are more promising for cosmological studies of the post-reionization epoch.
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Bias, redshift space distortions and primordial nongaussianity of nonlinear transformations: application to Ly-α forest
TL;DR: In this paper, the authors derived analytic expressions for the large scale bias, the velocity bias and the redshift space distortion (RSD) parameter β, as well as the scale dependent bias from primordial nongaussianity for a general nonlinear transformation.
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Fast simulations for intensity mapping experiments
TL;DR: In this article, the authors present a code to generate mock observations of 21 cm intensity mapping experiments, which can be used to generate independent realizations of the cosmological signal and foregrounds, which are necessary, for instance, in order to obtain realistic forecasts for future intensities.
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High-redshift post-reionisation cosmology with 21cm intensity mapping
TL;DR: In this article, the authors investigate the possibility of performing cosmological studies in the redshift range $2.5
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The 21-cm power spectrum after reionization
J. Stuart B. Wyithe,Abraham Loeb +1 more
TL;DR: In this paper, the authors derived the form of this modulation, and demonstrated that its effect on the 21-cm power spectrum following the completion of reionization will be smaller than 1 per cent for physically plausible models of damped Lyα systems.
References
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