Open AccessPosted Content
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
More filters
Journal ArticleDOI
Observational probes of cosmic acceleration
David H. Weinberg,Michael J. Mortonson,Daniel J. Eisenstein,Daniel J. Eisenstein,Christopher M. Hirata,Adam G. Riess,Eduardo Rozo +6 more
TL;DR: In this article, the authors present extensive forecasts for constraints on the dark energy equation of state and parameterized deviations from General Relativity, achievable with Stage III and Stage IV experimental programs that incorporate supernovae, BAO, weak lensing, and cosmic microwave background data.
Journal ArticleDOI
21 cm cosmology in the 21st century
TL;DR: This review detail the physics that governs the 21 cm signal and describe what might be learnt from upcoming observations, and generalize the discussion to intensity mapping of other atomic and molecular lines.
Journal ArticleDOI
Reionization and Cosmology with 21-cm Fluctuations
TL;DR: In this article, the authors discuss recent advances in theoretical understanding of the epoch of reionization (EoR), the application of 21-cm tomography to cosmology and measurements of the dark energy equation of state after reionisation, and the instrumentation and observational techniques shared by 21cm EoR and postreionization cosmology machines.
Journal ArticleDOI
Clustering of dark matter tracers: generalizing bias for the coming era of precision LSS
Patrick J. McDonald,A. Roy +1 more
TL;DR: In this paper, the power spectrum and bispectrum up to 4th order in the initial density perturbations were modeled as a Taylor series in the local mass density, with the unknown coefficients in the series treated as free bias parameters.
Journal ArticleDOI
Late-time cosmology with 21cm intensity mapping experiments
TL;DR: In this paper, the authors present a framework for forecasting cosmological constraints from future neutral hydrogen intensity mapping experiments at low to intermediate redshifts, and establish a simple way of comparing such surveys with optical galaxy redshift surveys.
References
More filters
Journal ArticleDOI
Evidence for C II Diffuse Line Emission at Redshift z∼2.6
TL;DR: In this article, the authors reported a detection of excess C II emission in the 545 GHz Planck band separate from the cosmic infrared background (CIB) present in the 353-857 GHz planck bands.
Journal ArticleDOI
Spherical Harmonic Analyses of Intensity Mapping Power Spectra
TL;DR: In this paper, a spherical Fourier-Bessel basis is proposed for analyzing intensity mapping data in a curved sky, which incorporates curved sky effects without difficulty, using visibility-based estimators for the power spectrum, treatments of interloper lines and the "foreground wedge" signature of spectrally smooth foregrounds.
Journal ArticleDOI
How Density Environment Changes the Influence of the Dark Matter-Baryon Streaming Velocity on the Cosmological Structure Formation
TL;DR: In this paper, the authors studied the dynamical effect of relative velocities between dark matter and baryonic fluids, which remained supersonic after the epoch of recombination.
Journal ArticleDOI
Simulated multitracer analyses with H I intensity mapping
TL;DR: In this paper, the authors used full sky simulations, including the effects of foreground contamination and removal, to explore multi-tracer synergies between a SKA-like 21cm intensity mapping survey and a LSST-like photometric galaxy redshift survey.
Journal ArticleDOI
Redundant-baseline calibration of the hydrogen epoch of reionization array
Joshua S. Dillon,Max E. Lee,Zaki S. Ali,Aaron R. Parsons,Naomi Orosz,Chuneeta D. Nunhokee,Paul La Plante,Paul La Plante,Adam P. Beardsley,Nicholas S. Kern,Zara Abdurashidova,James E. Aguirre,Paul Alexander,Yanga Balfour,Gianni Bernardi,Gianni Bernardi,Tashalee S. Billings,Judd D. Bowman,Richard F. Bradley,Phil Bull,Jacob Burba,S. H. Carey,Chris Carilli,Carina Cheng,David DeBoer,Matt Dexter,Eloy de Lera Acedo,John Ely,Aaron Ewall-Wice,Nicolas Fagnoni,Randall Fritz,Steven R. Furlanetto,Kingsley Gale-Sides,Brian Glendenning,Deepthi Gorthi,Bradley Greig,Jasper Grobbelaar,Ziyaad Halday,Bryna J. Hazelton,Jacqueline N. Hewitt,Jack Hickish,Daniel C. Jacobs,Austin Julius,Joshua Kerrigan,Piyanat Kittiwisit,Saul A. Kohn,Matthew Kolopanis,Adam Lanman,Telalo Lekalake,David Lewis,Adrian Liu,Yin-Zhe Ma,David MacMahon,Lourence Malan,Cresshim Malgas,Matthys Maree,Zachary E. Martinot,Eunice Matsetela,Andrei Mesinger,Mathakane Molewa,Miguel F. Morales,Tshegofalang Mosiane,Steven G. Murray,Abraham R. Neben,Bojan Nikolic,Robert Pascua,Nipanjana Patra,Samantha Pieterse,Jonathan C. Pober,Nima Razavi-Ghods,Jon Ringuette,James Robnett,Kathryn Rosie,Mario G. Santos,Peter Sims,Craig Smith,Angelo Syce,Max Tegmark,Nithyanandan Thyagarajan,Peter K. G. Williams,Peter K. G. Williams,Haoxuan Zheng +81 more
TL;DR: In this paper, the effects of real-world non-redundancy and how they compare to the idealized scenario in which redundant measurements differ only in their noise realizations are quantified.