A New Probe of the High-z BAO scale: BAO tomography With CMB $\times$ LIM-Nulling Convergence

Abstract

Standard rulers such as the baryon acoustic oscillation (BAO) scale serve as workhorses for precision tests of cosmology, enabling distance measurements that probe the geometry and expansion history of our Universe. Aside from BAO measurements from the cosmic microwave background (CMB), most standard ruler techniques operate at relatively low redshifts and depend on biased tracers of the matter density field. In a companion paper, we explored the scientific reach of nulling estimators, where CMB lensing convergence maps are cross-correlated with linear combinations of similar maps from line intensity mapping (LIM) to precisely null out the low-redshift contributions to CMB lensing. We showed that nulling estimators can be used to constrain the high redshift matter power spectrum and showed that this spectrum exhibits discernible BAO features. Here we propose using these features as a standard ruler at high redshifts that does not rely on biased tracers. Forecasting such a measurement at $z\sim 5$, we find that next-generation instruments will be able to constrain the BAO scale to percent-level precision at $7.2\%$, while our futuristic observing scenario can constrain the BAO scale to $4\%$ precision. This constitutes a fundamentally new kind of BAO measurement during early epochs in our cosmic history.

arXiv comment6 pages, 4 figures. arXiv admin note: text overlap with arXiv:2309.06477

References in corpus (39)

• emcee: The MCMC Hammer
• Planck 2015 results. XIII. Cosmological parameters
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• The 6dF Galaxy Survey: Baryon Acoustic Oscillations and the Local Hubble Constant
• Baryonic Features in the Matter Transfer Function
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• The Simons Observatory: Science goals and forecasts
• Mass Reconstruction with CMB Polarization
• CMB Lensing Reconstruction on the Full Sky
• Measurement of BAO correlations at $z=2.3$ with SDSS DR12 \lya-Forests
• The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: First measurement of Baryon Acoustic Oscillations between redshift 0.8 and 2.2
• Reconstruction of lensing from the cosmic microwave background polarization
• The WiggleZ Dark Energy Survey: Improved Distance Measurements to z = 1 with Reconstruction of the Baryonic Acoustic Feature
• Cosmology with Phase 1 of the Square Kilometre Array; Red Book 2018: Technical specifications and performance forecasts
• CMB-S4: Forecasting Constraints on Primordial Gravitational Waves
• Dark Energy Survey Year 1 Results: A Precise H0 Measurement from DES Y1, BAO, and D/H Data
• Baryon acoustic oscillations from the complete SDSS-III Ly$\alpha$-quasar cross-correlation function at $z=2.4$
• nbodykit: an open-source, massively parallel toolkit for large-scale structure
• Towards a cosmological neutrino mass detection
• Dark Energy Survey Year 1 Results: Measurement of the Baryon Acoustic Oscillation scale in the distribution of galaxies to redshift 1
• Analyzing weak lensing of the cosmic microwave background using the likelihood function
• The 21cm angular-power spectrum from the dark ages
• Parameter constraints from cross-correlation of CMB lensing with galaxy clustering
• Measuring Dark Matter Power Spectrum from Cosmic Microwave Background
• Robust Velocity-induced Acoustic Oscillations at Cosmic Dawn
• A Standard Ruler at Cosmic Dawn
• Nulling Tomography with Weak Gravitational Lensing
• Cosmic shear full nulling: sorting out dynamics, geometry and systematics
• Game of cones: A nulling strategy for modelling lensing convergence in cones with large deviation theory
• The Cosmic Expansion History from Line-Intensity Mapping
• Astrophysics & Cosmology from Line Intensity Mapping vs Galaxy Surveys
• Constraining the Expansion History and Early Dark Energy with Line Intensity Mapping
• Avoiding baryonic feedback effects on neutrino mass measurements from CMB lensing
• A Model-Insensitive Baryon Acoustic Oscillation Feature in the 21 cm Signal from Reionization
• Measuring the cosmic expansion rate using 21-cm velocity acoustic oscillations
• A new probe of the high-redshift Universe: nulling CMB lensing with interloper-free "LIM-pair" lensing
• Probing early structure and model-independent neutrino mass with high-redshift CMB lensing mass maps
• Constraining Cosmology With the CMB $\times$ LIM-Nulling Convergence
• Detecting deviations from Gaussianity in high-redshift CMB lensing maps

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• Forecasts and Statistical Insights for Line Intensity Mapping Cross-Correlations: A Case Study with 21cm x [CII]
• Constraining Cosmology With the CMB $\times$ LIM-Nulling Convergence
• Prospects for cosmological research with the FAST array: 21-cm intensity mapping survey observation strategies
• An Alcock-Paczynski Test on Reionization Bubbles for Cosmology
• Probing the warm dark matter mass with [C II] intensity mapping