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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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21 cm Intensity Mapping
Jeffrey B. Peterson,Roy Aleksan,R. Ansari,Kevin Bandura,Dick Bond,John D. Bunton,Kermit Carlson,Tzu-Ching Chang,F. DeJongh,M. A. Dobbs,Scott Dodelson,Hassane Darhmaoui,Nick Gnedin,Mark Halpern,Craig J. Hogan,J. M. Le Goff,Tiehui Ted Liu,Ahmed Legrouri,Avi Loeb,Khalid Loudiyi,Christophe Magneville,J. P. Marriner,D. McGinnis,Bruce McWilliams,M. Moniez,N. Palanque-Delabrouille,Ralph J. Pasquinelli,Ue-Li Pen,Jeffrey A. Rich,V. Scarpine,Hee-Jong Seo,Kris Sigurdson,U. Seljak,Albert Stebbins,Jason H. Steffen,Christopher Stoughton,Peter T. Timbie,Alberto Vallinotto,S. Wyithe,C. Yeche +39 more
TL;DR: Using the 21 cm line, observed all-sky and across the redshift range from 0 to 5, the large scale structure of the Universe can be mapped in three dimensions as mentioned in this paper.
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Cross-correlating 21cm intensity maps with Lyman Break Galaxies in the post-reionization era
Francisco Villaescusa-Navarro,Matteo Viel,David Alonso,Kanan K. Datta,Philip Bull,Mario G. Santos,Mario G. Santos +6 more
TL;DR: In this article, the cross-correlation between the spatial distribution of Lyman Break Galaxies (LBGs) and the 21cm intensity mapping signal at quasar spectra was investigated.
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Precision of diffuse 21-cm lensing
Tingting Lu,Ue-Li Pen +1 more
TL;DR: In this paper, the authors studied the limits of weak lensing maps of dark matter using diffuse 21-cm radiation from the pre-reionization epoch using simulations, and showed that non-Gaussianity provides a limit to the accuracy of strong lensing reconstruction, even if instrumental noise is reduced to zero.
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Probing primordial features with next-generation photometric and radio surveys
TL;DR: In this article, the authors investigate the possibility of using future photometric and radio surveys to constrain the power spectrum of primordial fluctuations that is predicted by inflationary models with a violation of the slow-roll phase.
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Probing large-scale filaments with H i and 3He ii
TL;DR: In this article, the authors explore the observability of neutral hydrogen (H I) and the singly ionized isotope helium-3 (3He II) in the intergalactic medium (IGM) from the Epoch of Reionization down to the local Universe.
References
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