An Intensity Mapping Detection of Aggregate CO Line Emission at 3 mm

Abstract

We present a detection of molecular gas emission at $z\sim 1-5$ using the technique of line intensity mapping. We make use of a pair of 3 mm interferometric data sets, the first from the ALMA Spectroscopic Survey in the Hubble Ultra Deep Field (ASPECS), and the second from a series of Atacama Compact Array (ACA) observations conducted between 2016 and 2018, targeting the COSMOS field. At 100 GHz, we measure non-zero power at 97.8% and 99.9% confidence in the ACA and ALMA data sets, respectively. In the joint result, we reject the zero-power hypothesis at 99.99% confidence, finding ${\tilde{I}}_s^2(\nu )=770\pm 210\mu {\text{K}}^2\text{Hz}\text{sr}$. After accounting for sample variance effects, the estimated spectral shot power is ${\tilde{I}}_s^2(\nu )=1010_{-390}^{+550}\mu {\text{K}}^2\text{Hz}\text{sr}$. We derive a model for the various line species our measurement is expected to be sensitive to, and estimate the shot power to be $120_{-40}^{+80}\mu {\text{K}}^2{h}^{-3}{\text{Mpc}}^3$, $200_{-70}^{+120}\mu {\text{K}}^2{h}^{-3}{\text{Mpc}}^3$, and $90_{-40}^{+70}\mu {\text{K}}^2{h}^{-3}{\text{Mpc}}^3$ for CO(2-1) at $z=1.3$, CO(3-2) at $z=2.5$, and CO(4-3) at $z=3.6$, respectively. Using line ratios appropriate for high-redshift galaxies, we find these results to be in good agreement with those from the CO Power Spectrum Survey (COPSS). Adopting ${\alpha }_{\mathrm{CO}}=3.6M_{\odot }(\text{K}\text{km}{\text{s}}^{-1}{\text{pc}}^2{)}^{-1}$, we estimate a cosmic molecular gas density of ${\rho }_{{\text{H}}_2}(z)\sim 10^8{M}_{\odot }{\text{Mpc}}^{-3}$ between $z=1-3$.

arXiv comment25 pages, 12 figures, 6 tables, 2 appendices. Accepted for publication in ApJ

References in corpus (75)

• The Global Schmidt Law in Star Forming Galaxies
• Efficient Computation of CMB anisotropies in closed FRW models
• Cosmic Star Formation History
• The CO-to-H2 Conversion Factor
• The Average Star Formation Histories of Galaxies in Dark Matter Halos from z=0-8
• The Milky Way in Molecular Clouds: A New Complete CO Survey
• The Cosmic Evolution Survey (COSMOS) -- Overview
• Toward a halo mass function for precision cosmology: the limits of universality
• Rotating Nuclear Rings and Extreme Starbursts in Ultraluminous Galaxies
• Cool Gas in High Redshift Galaxies
• The Large Scale Bias of Dark Matter Halos: Numerical Calibration and Model Tests
• PHIBSS: molecular gas content and scaling relations in z~1-3 normal star forming galaxies
• The Hubble Ultra Deep Field
• The Submillimeter Array
• Estimating the Power Spectrum of the Cosmic Microwave Background
• Regularity underlying complexity: a redshift-independent description of the continuous variation of galaxy-scale molecular gas properties in the mass-star formation rate plane
• Bright Source Subtraction Requirements For Redshifted 21 cm Measurements
• Four Fundamental Foreground Power Spectrum Shapes for 21 cm Cosmology Observations
• Improved upper limits on the 21-cm signal power spectrum of neutral hydrogen at $\mathbf{z}\approx 9.1$ from LOFAR
• CO excitation of normal star forming galaxies out to z=1.5 as regulated by the properties of their interstellar medium
• A measurement of secondary cosmic microwave background anisotropies with two years of South Pole Telescope observations
• Cosmic evolution of the atomic and molecular gas content of galaxies
• The dust content of galaxies from z = 0 to z = 9
• Toward Epoch of Reionization Measurements with Wide-Field Radio Observations
• AzTEC Millimetre Survey of the COSMOS Field: I. Data Reduction and Source Catalogue
• A Sensitivity and Array-Configuration Study for Measuring the Power Spectrum of 21cm Emission from Reionization
• Evolution of the atomic and molecular gas content of galaxies
• Intensity Mapping with Carbon Monoxide Emission Lines and the Redshifted 21 cm Line
• Simulation of the Cosmic Evolution of Atomic and Molecular Hydrogen in Galaxies
• The ALMA Spectroscopic Survey in the HUDF: CO luminosity functions and the molecular gas content of galaxies through cosmic history
• COLDz: Shape of the CO Luminosity Function at High Redshift and the Cold Gas History of the Universe
• Line-Intensity Mapping: 2017 Status Report
• CO Luminosity Functions For FIR and B-band Selected Galaxies and the First Estimate for Omega_{HI+H2}
• Evidence for an Intermediate-Mass Milky Way from Gaia DR2 Halo Globular Cluster Motions
• Low, Milky-Way like, Molecular Gas Excitation of Massive Disk Galaxies at z~1.5
• L'CO/LFIR Relations with CO Rotational Ladders of Galaxies Across the Herschel SPIRE Archive
• Interferometric Observation of Cosmic Microwave Background Anisotropies
• Measuring the 3D Clustering of Undetected Galaxies Through Cross Correlation of their Cumulative Flux Fluctuations from Multiple Spectral Lines
• Connecting CO Intensity Mapping to Molecular Gas and Star Formation in the Epoch of Galaxy Assembly
• ALMA spectroscopic survey in the Hubble Ultra Deep Field: CO luminosity functions and the evolution of the cosmic density of molecular gas
• The Cosmic Decline in the H2/HI-Ratio in Galaxies
• The CO Luminosity Density at High-z (COLDz) Survey: A Sensitive, Large Area Blind Search for Low-J CO Emission from Cold Gas in the Early Universe with the Karl G. Jansky Very Large Array
• A Molecular Line Scan in the Hubble Deep Field North: Constraints on the CO Luminosity Function and the Cosmic H2 Density
• COPSS II: The Molecular Gas Content of Ten Million Cubic Megaparsecs at $z\sim 3$
• Carbon monoxide line emission as a CMB foreground: tomography of the star-forming universe with different spectral resolutions
• The ALMA Spectroscopic Survey in the HUDF: CO emission lines and 3 mm continuum sources
• Evolution of the atomic and molecular gas content of galaxies in dark matter haloes
• Probing Reionization with Intensity Mapping of Molecular and Fine Structure Lines
• Cross-correlations as a cosmological carbon monoxide detector
• ALMACAL IV: A catalogue of ALMA calibrator continuum observations
• The ALMA Spectroscopic Survey in the HUDF: the molecular gas content of galaxies and tensions with IllustrisTNG and the Santa Cruz SAM
• COLDz: A High Space Density of Massive Dusty Starburst Galaxies ~1 Billion Years after the Big Bang
• The Atacama Large Millimeter Array (ALMA)
• Carbon Monoxide Intensity Mapping at Moderate Redshifts
• Spectral Line De-confusion in an Intensity Mapping Survey
• Cosmology with intensity mapping techniques using atomic and molecular lines
• Search for CII Emission on Cosmological Scales at Redshift Z~2.6
• Constraining the CO intensity mapping power spectrum at intermediate redshifts
• Line intensity mapping with [CII] and CO(1-0) as probes of primordial non-Gaussianity
• Plateau de Bure High-z Blue-Sequence Survey 2 (PHIBSS2): Search for Secondary Sources, CO Luminosity Functions in the Field, and the Evolution of Molecular Gas Density through Cosmic Time
• Demonstrating the Feasibility of Line Intensity Mapping Using Mock Data of Galaxy Clustering from Simulations
• A Self-consistent Framework for Multiline Modeling in Line Intensity Mapping Experiments
• First Results from COPSS: The CO Power Spectrum Survey
• Measuring Galaxy Clustering and the Evolution of [CII] Mean Intensity with far-IR Line Intensity Mapping During 0.5 < z < 1.5
• The Cosmic Expansion History from Line-Intensity Mapping
• Evidence for CII diffuse line emission at redshift $z\sim 2.6$
• Constraining the volume density of Dusty Star-Forming Galaxies through the first 3mm Number Counts from ALMA
• Microwave Spectro-Polarimetry of Matter and Radiation across Space and Time
• Studying high-z galaxies with [CII] intensity mapping
• A Measurement of Arcminute Anisotropy in the Cosmic Microwave Background with the Sunyaev-Zel'dovich Array
• Star and dust formation activities in AzTEC-3: A starburst galaxy at z = 5.3
• Constraining the Expansion History and Early Dark Energy with Line Intensity Mapping
• Probing Cosmic Origins with CO and [CII] Emission Lines
• Tracing the cosmological evolution of stars and cold gas with CMB spectral surveys
• The ALMA Spectroscopic Survey in the HUDF: Constraining cumulative CO emission at $1\lesssim z\lesssim 4$ with power spectrum analysis of ASPECS LP data from 84 to 115 GHz

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• COMAP Early Science: V. Constraints and Forecasts at $z\sim 3$
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• Precision Tests of CO and [CII] Power Spectra Models against Simulated Intensity Maps
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• Intensity mapping from the sky: synergizing the joint potential of [OIII] and [CII] surveys at reionization
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• A${}^3$COSMOS and A${}^3$GOODSS: Continuum Source Catalogues and Multi-band Number Counts
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• Biases and Cosmic Variance in Molecular Gas Abundance Measurements
• On estimating the cosmic molecular gas density from CO Line Intensity Mapping observations
• 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
• Extragalactic Science with the Experiment for Cryogenic Large-aperture Intensity Mapping
• Extragalactic CO emission lines in the CMB experiments: a forgotten signal and a foreground
• Constraining low redshift [CII] Emission by Cross-Correlating FIRAS and BOSS Data
• Deep learning reconstruction of three-dimensional galaxy distributions with intensity mapping observations
• Spritz is sparkling: simulated CO and [CII] luminosities
• The deconvolved distribution estimator: enhancing reionisation-era CO line-intensity mapping analyses with a cross-correlation analogue for one-point statistics
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• Foreground Removal of CO Intensity Mapping Using Deep Learning
• SIMPLE: Simple Intensity Map Producer for Line Emission
• Characteristic Functions for Cosmological Cross-Correlations
• Bayesian Multi-line Intensity Mapping
• Towards Accurate Modeling of Line-Intensity Mapping One-Point Statistics: Including Extended Profiles
• Boosting Line Intensity Map Signal-to-Noise with the Ly-$\alpha$ Forest Cross-Correlation
• A Multi-messenger view of Cosmic Dawn: Conquering the Final Frontier
• COMAP Pathfinder -- Season 2 results II. Updated constraints on the CO(1-0) power spectrum
• Probing the cosmic web in Ly$\alpha$ emission over large scales: an Intensity Mapping forecast for DECaLS/BASS and DESI
• The power spectrum of galaxies from large to small scales: a line-intensity mapping perspective
• A Forecast for Large Scale Structure Constraints on Horndeski Gravity with Line Intensity Mapping
• COMAP Pathfinder -- Season 2 results III. Implications for cosmic molecular gas content at "Cosmic Half-past Eleven"
• Leveraging cross-correlations and linear covariance-based filtering for line-intensity map reconstructions at linear scales
• Three-Dimensional Stacking as a Line Intensity Mapping Statistic
• The informativeness of [C II] line-intensity mapping as a probe of the H I content and metallicity of galaxies at the end of reionization
• Removal of interloper contamination to line-intensity maps using correlations with ancillary tracers of the large-scale structure
• Lyα Intensity Mapping in HETDEX: Galaxy-Lyα Intensity Cross-Power Spectrum
• Constraining the halo-ISM connection through multi-transition carbon monoxide line-intensity mapping
• oLIMpus: An Effective Model for Line Intensity Mapping Auto- and Cross- Power Spectra in Cosmic Dawn and Reionization
• A Beginner's Guide to Line Intensity Mapping Power Spectra
• Constraining the [CII] luminosity function from the power spectrum of line-intensity maps at redshift 3.6
• CosmoGLINT: Cosmological Generative Model for Line Intensity Mapping with Transformer
• Far-infrared lines hidden in archival deep multi-wavelength surveys: Limits on [CII]-158$\mu$m at $z\sim 0.3-2.9$
• COMAP Pathfinder -- Season 2 results IV. A stack on eBOSS/DESI quasars
• Cross-correlations between mm-wave line-intensity mapping and weak lensing surveys: preliminary consideration of long-term prospects
• Comparison of Cross-Correlation Methods for Line Intensity Mapping
• Unveiling the evolution of the CO excitation ladder through cross-correlation of CONCERTO-like experiments and galaxy redshift surveys
• A New Boundary Condition on Reionization
• Populating Galaxies Into Halos Via Machine Learning on the Simba Simulation