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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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Search for C ii emission on cosmological scales at redshift Z ∼ 2.6
Anthony R. Pullen,Anthony R. Pullen,Paolo Serra,Tzu-Ching Chang,Tzu-Ching Chang,Olivier Doré,Shirley Ho,Shirley Ho +7 more
TL;DR: In this paper, a search for CII emission over cosmological scales at high redshifts is presented, where the CII line is a prime candidate to be a tracer of star formation over large-scale structure since it is one of the brightest emission lines from galaxies.
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Extending cosmological tests of General Relativity with the Square Kilometre Array
TL;DR: In this article, the Square Kilometre Array (SKA) will carry out several wide and deep surveys of resolved and unresolved neutral hydrogen (HI) 21cm line-emitting galaxies, mapping a significant fraction of the sky from 0 to 6.
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How well can we measure and understand foregrounds with 21 cm experiments
Adrian Liu,Max Tegmark +1 more
TL;DR: In this paper, the authors focus on spectral modeling and show that 21 cm tomography experiments will likely not be able to measure these parameters without large degeneracies, simply because the foreground spectra are so featureless and generic.
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Baryonic acoustic oscillations from 21 cm intensity mapping: the Square Kilometre Array case
TL;DR: In this paper, the authors quantitatively investigate the possibility of detecting baryonic acoustic oscillations (BAO) using single-dish 21cm intensity mapping observations in the post-reionization era.
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PARTICLE MESH SIMULATIONS OF THE Lyα FOREST AND THE SIGNATURE OF BARYON ACOUSTIC OSCILLATIONS IN THE INTERGALACTIC MEDIUM
Martin White,Adrian Pope,Jordan Carlson,Katrin Heitmann,Salman Habib,Patricia Fasel,David Daniel,Zarija Lukić +7 more
TL;DR: In this paper, a set of ultra-large particle-mesh simulations of the Lyα forest targeted at understanding the imprint of baryon acoustic oscillations in the intergalactic medium is presented.
References
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