Evidence for CII diffuse line emission at redshift $z\sim 2.6$

Abstract

CII is one of the brightest emission lines from star-forming galaxies and is an excellent tracer for star formation. Recent work measured the CII emission line amplitude for redshifts $2<z<3.2$ by cross-correlating Planck High Frequency Instrument emission maps with tracers of overdensity from the Baryon Oscillation Spectroscopic Sky Survey, finding $I_{\mathrm{CII}}=6.6_{-4.8}^{+5.0}\times 10^4$ Jy/sr at $95\%$ confidence. In this paper, we present a refinement of this earlier work by improving the mask weighting in each of the Planck bands and the precision in the covariance matrix. We report a detection of excess emission in the 545 GHz Planck band separate from the cosmic infrared background (CIB) present in the 353-857 GHz Planck bands. This excess is consistent with redshifted CII emission, in which case we report $b_{\mathrm{CII}}{I}_{\mathrm{CII}}=2.0_{-1.1}^{+1.2}\times 10^5$ Jy/sr at $95\%$ confidence, which strongly favors many collisional excitation models of CII emission. Our detection shows strong evidence for a model with a non-zero CII parameter, though line intensity mapping observations at high spectral resolution will be needed to confirm this result.

References in corpus (35)

• Efficient Computation of CMB anisotropies in closed FRW models
• Cosmological parameters from CMB and other data: a Monte-Carlo approach
• The 2.5 m Telescope of the Sloan Digital Sky Survey
• SDSS-III: Massive Spectroscopic Surveys of the Distant Universe, the Milky Way Galaxy, and Extra-Solar Planetary Systems
• The Baryon Oscillation Spectroscopic Survey of SDSS-III
• The Sloan Digital Sky Survey Photometric Camera
• Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe
• UV Luminosity Functions at redshifts z~4 to z~10: 10000 Galaxies from HST Legacy Fields
• Cool Gas in High Redshift Galaxies
• The Multi-Object, Fiber-Fed Spectrographs for SDSS and the Baryon Oscillation Spectroscopic Survey
• The Large Scale Bias of Dark Matter Halos: Numerical Calibration and Model Tests
• The SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Overview and Early Data
• 21-cm Tomography of the Intergalactic Medium at High Redshift
• MASTER of the CMB Anisotropy Power Spectrum: A Fast Method for Statistical Analysis of Large and Complex CMB Data Sets
• The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the extended Baryon Oscillation Spectroscopic Survey and from the second phase of the Apache Point Observatory Galactic Evolution Experiment
• A Three-Dimensional Map of Milky-Way Dust
• Baryon Acoustic Oscillation Intensity Mapping as a Test of Dark Energy
• Photometric Response Functions of the SDSS Imager
• The clustering of intermediate redshift quasars as measured by the Baryon Oscillation Spectroscopic Survey
• Intensity Mapping of the [CII] Fine Structure Line during the Epoch of Reionization
• Baryonic Acoustic Oscillations in 21cm Emission: A Probe of Dark Energy out to High Redshifts
• Xspect, estimation of the angular power spectrum by computing cross-power spectra with analytical error bars
• Planck early results. VI. The High Frequency Instrument data processing
• Measuring the 3D Clustering of Undetected Galaxies Through Cross Correlation of their Cumulative Flux Fluctuations from Multiple Spectral Lines
• Clustering of quasars in SDSS-IV eBOSS : study of potential systematics and bias determination
• CMB temperature and polarisation pseudo-Cl estimators and covariances
• Improved Models for Cosmic Infrared Background Anisotropies: New Constraints on the IR Galaxy Population
• ALMA [CII] detection of a redshift 7 lensed galaxy behind RXJ1347.1-1145
• The Atacama Cosmology Telescope: Lensing of CMB Temperature and Polarization Derived from Cosmic Infrared Background Cross-Correlation
• Search for CII Emission on Cosmological Scales at Redshift Z~2.6
• Constraining the evolution of CII intensity through the end stages of reionization
• Insights from probability distribution functions of intensity maps
• Joint power spectrum and voxel intensity distribution forecast on the CO luminosity function with COMAP
• Detecting z > 10 objects through carbon, nitrogen and oxygen emission lines
• Intensity Mapping in the Presence of Foregrounds and Correlated Continuum Emission

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• A User's Guide to Extracting Cosmological Information from Line-Intensity Maps
• An Intensity Mapping Detection of Aggregate CO Line Emission at 3 mm
• A Self-consistent Framework for Multiline Modeling in Line Intensity Mapping Experiments
• An empirical representation of a physical model for the ISM [CII], CO, and [CI] emission at redshift $1\le z\le 9$
• Multitracer cosmological line intensity mapping mock lightcone simulation
• [CII] line intensity mapping the epoch of reionization with the Prime-Cam on FYST
• The Experiment for Cryogenic Large-aperture Intensity Mapping (EXCLAIM)
• An Intensity Mapping Constraint on the CO-Galaxy Cross Power Spectrum at Redshift ~ 3
• Intensity mapping from the sky: synergizing the joint potential of [OIII] and [CII] surveys at reionization
• Coupling parsec and gigaparsec scales: primordial non-Gaussianity with multi-tracer intensity mapping
• Cosmic Near-infrared Background Tomography with SPHEREx Using Galaxy Cross-correlations
• Probing Population III Initial Mass Functions with He II/H$\alpha$ Intensity Mapping
• 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
• Constraining low redshift [CII] Emission by Cross-Correlating FIRAS and BOSS Data
• Intensity Mapping without Cosmic Variance
• Optical Design of the EXperiment for Cryogenic Large-Aperture Intensity Mapping (EXCLAIM)
• Mapping the Universe in HD
• Characteristic Functions for Cosmological Cross-Correlations
• Towards Accurate Modeling of Line-Intensity Mapping One-Point Statistics: Including Extended Profiles
• Bayesian Multi-line Intensity Mapping
• A Multi-messenger view of Cosmic Dawn: Conquering the Final Frontier
• On the contributions of extragalactic CO emission lines to ground-based CMB observations
• Probing the cosmic web in Ly$\alpha$ emission over large scales: an Intensity Mapping forecast for DECaLS/BASS and DESI
• Leveraging cross-correlations and linear covariance-based filtering for line-intensity map reconstructions at linear scales
• Removal of interloper contamination to line-intensity maps using correlations with ancillary tracers of the large-scale structure
• Deconfusing intensity maps with neural networks
• Constraining the halo-ISM connection through multi-transition carbon monoxide line-intensity mapping
• Far-infrared lines hidden in archival deep multi-wavelength surveys: Limits on [CII]-158$\mu$m at $z\sim 0.3-2.9$
• A Beginner's Guide to Line Intensity Mapping Power Spectra
• Comparison of Cross-Correlation Methods for Line Intensity Mapping