Precision Tests of CO and [CII] Power Spectra Models against Simulated Intensity Maps

Abstract

Line intensity mapping (LIM) is an emerging technique with a unique potential to probe a wide range of scales and redshifts. Realizing the full potential of LIM, however, relies on accurate modeling of the signal. We introduce an extended halo model for the power spectrum of intensity fluctuations of CO rotational lines and [CII] fine transition line in real space, modeling nonlinearities in matter fluctuations and biasing relation between the line intensity fluctuations and the underlying dark matter distribution. We also compute the stochastic contributions beyond the Poisson approximation using the halo model framework. To establish the accuracy of the model, we create the first cosmological-scale simulations of CO and [CII] intensity maps, \textsf{MithraLIMSims}, at redshifts $0.5\le z\le 6$, using halo catalogs from Hidden-Valley simulations, and painting halos according to mass-redshift-luminosity relations for each line. We show that at $z=1$ on scales $k_{\max }\lesssim 0.8{\mathrm{Mpc}}^{-1}h$, the model predictions of clustering power (with only two free parameters) are in agreement with the measured power spectrum at better than 5\%. At higher redshift of $z=4.5$, this remarkable agreement extends to smaller scale of $k_{\max }\lesssim 2{\mathrm{Mpc}}^{-1}h$. Furthermore, we show that on large scales, the stochastic contributions to CO and CII power spectra are non-Poissonian, with amplitudes reproduced reasonably well by the halo model prescription. Lastly, we assess the performance of the theoretical model of the baryon acoustic oscillations (BAO) and show that hypothetical LIM surveys probing CO lines at $z=1$, that can be deployed within this decade, will be able to make a high significance measurement of the BAO. On a longer time scale, a space-based mission probing [CII] line can uniquely measure the BAO on a wide range of redshifts at an unprecedented precision.

v3 matches the published article

References in corpus (35)

• The hierarchical formation of the brightest cluster galaxies
• A Highly Consistent Framework for the Evolution of the Star-Forming "Main Sequence" from z~0-6
• The DESI Experiment Part I: Science,Targeting, and Survey Design
• The Effective Field Theory of Cosmological Large Scale Structures
• Gravity and Large-Scale Non-local Bias
• The IR-resummed Effective Field Theory of Large Scale Structures
• On the Lack of Evolution in Galaxy Star Formation Efficiency
• The Scale Dependence of Halo and Galaxy Bias: Effects in Real Space
• Cosmology with the SPHEREX All-Sky Spectral Survey
• Line-Intensity Mapping: 2017 Status Report
• Deep into the structure of the first galaxies: SERRA views
• Modeling scale-dependent bias on the baryonic acoustic scale with the statistics of peaks of Gaussian random fields
• Analytic model for the matter power spectrum, its covariance matrix, and baryonic effects
• Primordial Non-Gaussianity from Biased Tracers: Likelihood Analysis of Real-Space Power Spectrum and Bispectrum
• The THESAN project: predictions for multi-tracer line intensity mapping in the epoch of reionization
• Carbon Monoxide Intensity Mapping at Moderate Redshifts
• An Intensity Mapping Detection of Aggregate CO Line Emission at 3 mm
• Multi-tracer intensity mapping: Cross-correlations, Line noise & Decorrelation
• Halo Zeldovich model and perturbation theory: dark matter power spectrum and correlation function
• Astrophysics and Cosmology with Line-Intensity Mapping
• Shot noise and biased tracers: a new look at the halo model
• Strategies to Detect Dark-Matter Decays with Line-Intensity Mapping
• Multitracer cosmological line intensity mapping mock lightcone simulation
• Neutrino Properties with Ground-Based Millimeter-Wavelength Line Intensity Mapping
• SPT-SLIM: A Line Intensity Mapping Pathfinder for the South Pole Telescope
• The Effective Halo Model: Creating a Physical and Accurate Model of the Matter Power Spectrum and Cluster Counts
• Astrophysics & Cosmology from Line Intensity Mapping vs Galaxy Surveys
• An Intensity Mapping Constraint on the CO-Galaxy Cross Power Spectrum at Redshift ~ 3
• Detecting the radiative decay of the cosmic neutrino background with line-intensity mapping
• A model of spectral line broadening in signal forecasts for line-intensity mapping experiments
• CDIM: Cosmic Dawn Intensity Mapper Final Report
• The prospects for observing [OIII] 52 micron emission from galaxies during the Epoch of Reionization
• Optical Design of the EXperiment for Cryogenic Large-Aperture Intensity Mapping (EXCLAIM)
• Removing Interlopers From Intensity Mapping Probes Of Primordial Non-Gaussianity
• Overview and status of EXCLAIM, the experiment for cryogenic large-aperture intensity mapping

Cited by in corpus (24)

• Line-Intensity Mapping: Theory Review
• Priors on red galaxy stochasticity from hybrid effective field theory
• An Intensity Mapping Constraint on the CO-Galaxy Cross Power Spectrum at Redshift ~ 3
• COMAP Early Science: IV. Power Spectrum Methodology and Results
• The local PNG bias of neutral Hydrogen, ${\mathrm{H}}_{\mathrm{I}}$
• COMAP Early Science: III. CO Data Processing
• Revisiting the [C II]${}_{158\mu \text{m}}$ line-intensity mapping power spectrum from the EoR using non-uniform line-luminosity scatter
• Cosmological Probes of Structure Growth and Tests of Gravity
• Forecasts and Statistical Insights for Line Intensity Mapping Cross-Correlations: A Case Study with 21cm x [CII]
• A multi-tracer empirically-driven approach to line-intensity mapping lightcones
• Exploration of 3D wavelet scattering transform coefficients for line-intensity mapping measurements
• SIMPLE: Simple Intensity Map Producer for Line Emission
• Towards Accurate Modeling of Line-Intensity Mapping One-Point Statistics: Including Extended Profiles
• On the contributions of extragalactic CO emission lines to ground-based CMB observations
• Bayesian Multi-line Intensity Mapping
• $\text{slick}$: Modeling a Universe of Molecular Line Luminosities in Hydrodynamical Simulations
• Impact of astrophysical scatter on the Epoch of Reionization [H I]${}_{21cm}$ bispectrum
• The power spectrum of galaxies from large to small scales: a line-intensity mapping perspective
• Probing the Epoch of Reionization using synergies of line intensity mapping
• Removal of interloper contamination to line-intensity maps using correlations with ancillary tracers of the large-scale structure
• Constraining the [CII] luminosity function from the power spectrum of line-intensity maps at redshift 3.6
• Probing the warm dark matter mass with [C II] intensity mapping
• Challenges of standard halo models in constraining galaxy properties from CIB anisotropies
• Cross-correlations between mm-wave line-intensity mapping and weak lensing surveys: preliminary consideration of long-term prospects