On the contributions of extragalactic CO emission lines to ground-based CMB observations
arXiv:2405.20369 · doi:10.1103/PhysRevD.110.103535
Abstract
We investigate the potential of CO rotational lines at redshifts being an appreciable source of extragalactic foreground anisotropies in the cosmic microwave background. Motivated by previous investigations, we specifically focus on the frequency bands and small scales probed by ground-based surveys. Using an empirical parameterization for the relation between the infrared luminosity of galaxies and their CO line luminosity, conditioned on sub-mm observations of CO luminosity functions from to at GHz, we explore how uncertainty in the CO luminosity function translates into uncertainty in the signature of CO emission in the CMB. We find that at the amplitude of the CO cross-correlation with the CIB could be detectable in an ACT-like experiment with 90, 150 and 220 GHz bands, even in the scenarios with the lowest amplitude consistent with sub-mm data. We also investigate, for the first time, the amplitude of the COCIB correlation between different frequency bands and find that our model predicts that this signal could be the second-largest extragalactic foreground at certain wavelengths, behind the CIB cross-frequency spectrum. This implies current observations can potentially be used to constrain the bright end of CO luminosity functions, which are difficult to probe with current sub-mm telescopes due to the small volumes they survey. Our findings corroborate past results and have significant implications in template-based searches for CMB secondaries, such as the kinetic Sunyaev Zel'dovich effect, using the frequency-dependent high- TT power spectrum.
arXiv comment14+3 pages, 8+2 figures. Reflects published version, with an additional post-publication revision which corrects a normalization error in the original work. Results have changed quantitatively
References in corpus (41)
- SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
- Array Programming with NumPy
- Planck 2015 results. XIII. Cosmological parameters
- HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
- Cosmic Star Formation History
- Star Formation in the Milky Way and Nearby Galaxies
- The Simons Observatory: Science goals and forecasts
- The Rockstar Phase-Space Temporal Halo Finder and the Velocity Offsets of Cluster Cores
- UniverseMachine: The Correlation between Galaxy Growth and Dark Matter Halo Assembly from z=0-10
- Cool Gas in High Redshift Galaxies
- MultiDark simulations: the story of dark matter halo concentrations and density profiles
- The Atacama Cosmology Telescope: DR4 Maps and Cosmological Parameters
- A measurement of secondary cosmic microwave background anisotropies with two years of South Pole Telescope observations
- Planck 2013 results. IX. HFI spectral response
- The impact of clustering and angular resolution on far-infrared and millimeter continuum observations
- The Atacama Cosmology Telescope: likelihood for small-scale CMB data
- The ALMA Spectroscopic Survey Large Program: The Infrared Excess of z=1.5-10 UV-selected Galaxies and the Implied High-Redshift Star Formation History
- L'CO/LFIR Relations with CO Rotational Ladders of Galaxies Across the Herschel SPIRE Archive
- Connecting CO Intensity Mapping to Molecular Gas and Star Formation in the Epoch of Galaxy Assembly
- SPTpol: an instrument for CMB polarization measurements with the South Pole Telescope
- An Improved Measurement of the Secondary Cosmic Microwave Background Anisotropies from the SPT-SZ + SPTpol Surveys
- The Websky Extragalactic CMB Simulations
- The ALMA Spectroscopic Survey in the HUDF: Multi-band constraints on line luminosity functions and the cosmic density of molecular gas
- CCAT-prime Collaboration: Science Goals and Forecasts with Prime-Cam on the Fred Young Submillimeter Telescope
- Carbon monoxide line emission as a CMB foreground: tomography of the star-forming universe with different spectral resolutions
- Line-Intensity Mapping: Theory Review
- A User's Guide to Extracting Cosmological Information from Line-Intensity Maps
- COLDz: A High Space Density of Massive Dusty Starburst Galaxies ~1 Billion Years after the Big Bang
- COMAP Early Science: I. Overview
- CONCERTO: High-fidelity simulation of millimeter line emissions of galaxies and [CII] intensity mapping
- Multi-tracer intensity mapping: Cross-correlations, Line noise & Decorrelation
- Constraining the Baryon Abundance with the Kinematic Sunyaev-Zel'dovich Effect: Projected-Field Detection Using Planck, WMAP, and unWISE
- A Self-consistent Framework for Multiline Modeling in Line Intensity Mapping Experiments
- Probing Cosmic Reionization and Molecular Gas Growth with TIME
- Evidence for CII diffuse line emission at redshift
- Weak Lensing of Intensity Mapping: the Cosmic Infrared Background
- Precision Tests of CO and [CII] Power Spectra Models against Simulated Intensity Maps
- A NOEMA molecular line scan of the Hubble Deep Field North: Improved constraints on the CO luminosity functions and cosmic density of molecular gas
- Modeling HI at the field level
- A multi-tracer empirically-driven approach to line-intensity mapping lightcones
- Extragalactic CO emission lines in the CMB experiments: a forgotten signal and a foreground