The Faint Host Galaxies of C IV Absorbers at z > 5

Abstract

We explore the expected galaxy environments of CIV absorbers at z>5 using the Technicolor Dawn simulations. These simulations reproduce the observed history of reionization, the z~6 galaxy stellar mass function, the Ly$\alpha$ forest transmission at z>5, and the SiIV column density distribution (CDD) at z~5.5. Nonetheless, the CIV CDD remains underproduced. Comparison with observed CII/SiII equivalent width ratios and the CII line incidence suggests that a low carbon yield accounts for some, but not all, of the CIV discrepancy. Alternatively, a density-bounded escape scenario could harden the metagalactic ionizing background more dramatically even than binary stellar evolution, boosting the CIV CDD into near-agreement with observations. In this case galaxies ionize more efficiently and fewer are required to host a given high-ionization absorber. Absorbers' environments therefore constrain ionizing escape. Regardless of the escape scenario, galaxies correlate with CIV absorbers out to 300 proper kpc (pkpc). The correlation strengthens independently with galaxy luminosity and CIV column density. Around strong systems (log(N${}_{\mathrm{CIV}}$/cm${}^{-2}$)>14)), the overdensity of galaxies with M${}_{\mathrm{UV}}$<-18 or log($L_{\mathrm{Ly}\alpha }$/erg s${}^{-1}$) > 41.9 declines from 200-300 within 100 pkpc to 40-60 within 250 pkpc. The previously-suggested association between strong CIV absorbers and Ly$\alpha$ emitters at z>5 is not expected. It may arise if both populations inhabit large-scale voids, but for different reasons. Although most neighboring galaxies are too faint for HST, JWST will, with a single pointing, identify ~10 neighboring galaxies per strong CIV absorber at z > 5. Ground-based tests of these predictions are possible via deep surveys for Ly$\alpha$ emission using integral field units.

arXiv comment15 pages, 16 figures, resubmitted to MNRAS with improvements following first referee report

References in corpus (111)

• The chemical composition of the Sun
• High Redshift Galaxies in the Hubble Deep Field. Color Selection and Star Formation History to z=4
• A very energetic supernova associated with the gamma-ray burst of 29 March 2003
• Physical Models of Galaxy Formation in a Cosmological Framework
• UV Luminosity Functions at redshifts z~4 to z~10: 10000 Galaxies from HST Legacy Fields
• Radiative transfer in a clumpy universe: IV. New synthesis models of the cosmic UV/X-ray background
• A Cosmology Calculator for the World Wide Web
• The Structure and Kinematics of the Circum-Galactic Medium from Far-UV Spectra of z~2-3 Galaxies
• Binary Population and Spectral Synthesis Version 2.1: construction, observational verification and new results
• Cosmic Reionization and Early Star-Forming Galaxies: A Joint Analysis of New Constraints from Planck and Hubble Space Telescope
• On the properties of massive Population III stars and metal-free stellar populations
• The physics driving the cosmic star formation history
• Nucleosynthesis Yields of Core-Collapse Supernovae and Hypernovae, and Galactic Chemical Evolution
• The Evolution of the Galaxy Rest-Frame Ultraviolet Luminosity Function Over the First Two Billion Years
• A New Calculation of the Ionizing Background Spectrum and the Effects of HeII Reionization
• Statistics of 207 Lya Emitters at a Redshift Near 7: Constraints on Reionization and Galaxy Formation Models
• Gusty, gaseous flows of FIRE: galactic winds in cosmological simulations with explicit stellar feedback
• The history of star formation in a LCDM universe
• Mass, Metal, and Energy Feedback in Cosmological Simulations
• Generic Spectrum and Ionization Efficiency of a Heavy Initial Mass Function for the First Stars
• Evidence of patchy hydrogen reionization from an extreme Ly$\alpha$ trough below redshift six
• The Enrichment of the Intergalactic Medium with Adiabatic Feedback I: Metal Cooling and Metal Diffusion
• Reionization of the Intergalactic Medium and the Damping Wing of the Gunn-Peterson Trough
• Directly Observing the Galaxies Likely Responsible for Reionization
• Stellar Population Effects on the Inferred Photon Density at Reionization
• Escape fraction of ionizing photons during reionization: effects due to supernova feedback and runaway OB stars
• Early star-forming galaxies and the reionization of the Universe
• The Evolution of the Intergalactic Medium
• Detection of high Lyman continuum leakage from four low-redshift compact star-forming galaxies
• The Evolution of the Galaxy Stellar Mass Function at z= 4-8: A Steepening Low-mass-end Slope with Increasing Redshift
• Low-redshift Lyman continuum leaking galaxies with high [OIII]/[OII] ratios
• The Keck Lyman Continuum Spectroscopic Survey (KLCS): The Emergent Ionizing Spectrum of Galaxies at $z\sim 3$
• The spectral evolution of the first galaxies. I. James Webb Space Telescope detection limits and color criteria for population III galaxies
• Using Lyman-alpha to detect galaxies that leak Lyman continuum
• The mass evolution of the first galaxies: stellar mass functions and star formation rates at $4<z<7$ in the CANDELS GOODS-South field
• The galaxy stellar mass function at 3.5<z<7.5 in the CANDELS/UDS, GOODS-South, and HUDF fields
• Ionizing Photon Escape Fractions from High Redshift Dwarf Galaxies
• The SPHINX Cosmological Simulations of the First Billion Years: the Impact of Binary Stars on Reionization
• Spectroscopic detection of CIV in a galaxy at z=7.045: Implications for the ionizing spectra of reionization-era galaxies
• J1154+2443: a low-redshift compact star-forming galaxy with a 46 per cent leakage of Lyman continuum photons
• Keeping the Universe ionised: Photo-heating and the clumping factor of the high-redshift intergalactic medium
• Planck intermediate results. XLVII. Planck constraints on reionization history
• The Extreme Faint End of the UV Luminosity Function at $z\sim 6$ Through Gravitational Telescopes: a comprehensive assessment of strong lensing uncertainties
• The First Billion Years Project: The escape fraction of ionizing photons in the epoch of reionization
• The Lyman-Continuum Photon Production Efficiency xi_{ion} of z~4-5 Galaxies from IRAC-based Halpha Measurements: Implications for the Escape Fraction and Cosmic Reionization
• The Origins of the Circumgalactic Medium in the FIRE Simulations
• The Giant Gemini GMOS survey of z>4.4 quasars - I. Measuring the mean free path across cosmic time
• New constraints on Lyman-α opacity with a sample of 62 quasars at z > 5.7
• What are Protoclusters? -- Defining High Redshift Galaxy Clusters and Protoclusters
• Simulating cosmic reionization: How large a volume is large enough?
• The spectral evolution of the first galaxies. II. Spectral signatures of Lyman continuum leakage from galaxies in the reionization epoch
• The Lyman Continuum Escape Survey: Ionizing Radiation from [O III]-Strong Sources at a Redshift of 3.1
• Neutral hydrogen in galaxy halos at the peak of the cosmic star formation history
• On Lyman-limit Systems and the Evolution of the Intergalactic Ionizing Background
• New synthesis models of consistent extragalactic background light over cosmic time
• Evolution of the galaxy stellar mass functions and UV luminosity functions at $z=6-9$ in the Hubble Frontier Fields
• The Opacity of the Intergalactic Medium Measured Along Quasar Sightlines at $z\sim 6$
• Binary Stars Can Provide the "Missing Photons" Needed for Reionization
• Revealing reionization with the thermal history of the intergalactic medium: new constraints from the Lyman-$\alpha$ flux power spectrum
• Large Fluctuations in the High-Redshift Metagalactic Ionizing Background
• Gas Clumping in Self-Consistent Reionisation Models
• Interpreting ALMA Observations of the ISM During the Epoch of Reionisation
• Understanding the escape of LyC and Ly$\alpha$ photons from turbulent clouds
• Ionising the Intergalactic Medium by Star Clusters: The first empirical evidence
• MApping the Most Massive Overdensities (MAMMOTH) II -- Discovery of an Extremely Massive Overdensity BOSS1441 at $z=2.32$
• The Lyman-alpha luminosity function at z=5.7-6.6 and the steep drop of the faint end: implications for reionization
• Cosmic distribution of highly ionized metals and their physical conditions in the EAGLE simulations
• The Sunburst Arc: Direct Lyman α escape observed in the brightest known lensed galaxy
• Metals in the IGM approaching the re-ionization epoch: results from X-shooter at the VLT
• The VIMOS Ultra Deep Survey: Emerging from the Dark, a Massive Proto-Cluster at z~4.57
• Inferred Hα Flux as a Star-Formation Rate Indicator at z ~ 4-5: Implications for Dust Properties, Burstiness, and the z = 4-8 Star-Formation-Rate Functions
• The MUSE Hubble Ultra Deep Field Survey VI: The Faint-End of the Lya Luminosity Function at 2.91 < z < 6.64 and Implications for Reionisation
• Beamed Lyman Alpha Emission through Outflow-Driven Cavities
• Indirect Evidence for Escaping Ionizing Photons in Local Lyman Break Galaxy Analogs
• A New Constraint on the Escape Fraction in Distant Galaxies Using Gamma-ray Burst Afterglow Spectroscopy
• A Systematic Survey of Protoclusters at $z\sim 3-6$ in the CFHTLS Deep Fields
• A Monte Carlo simulation of the intergalactic absorption and the detectability of the Lyman continuum from distant galaxies
• Intense CIV and HeII Emission in z~0 Galaxies: Probing High-Energy Ionizing Photons
• The Major Sources of the Cosmic Reionizing Background at z ~ 6
• High-Redshift Metals. II. Probing Reionization Galaxies with Low-Ionization Absorption Lines at Redshift Six
• The Evolution of O I over 3.2 < z < 6.5: Reionization of the Circumgalactic Medium
• The fraction of ionizing radiation from massive stars that escapes to the intergalactic medium
• Constraints on the Ionizing Efficiency of the First Galaxies
• Reionization in Technicolor
• The Role of Galaxies and AGN in Reionising the IGM - I: Keck Spectroscopy of 5 < z < 7 Galaxies in the QSO Field J1148+5251
• A Comprehensive Study of Ly$\alpha$ Emission in the High-redshift Galaxy Population
• On the importance of local sources of radiation for quasar absorption line systems
• Runaway Stars and the Escape of Ionizing Radiation from High-Redshift Galaxies
• Spectroscopic Confirmation of a Protocluster at z=3.786
• Mean Halpha+[NII]+[SII] EW Inferred for Star-Forming Galaxies at z=5.1-5.4 Using High-Quality Spitzer/IRAC Photometry
• Testing the effect of galactic feedback on the IGM at z ~ 6 with metal-line absorbers
• The Soft, Fluctuating UVB at $z\sim 6$ as Traced by C IV, SiIV, and CII
• Chemical enrichment of Damped Lyman Alpha systems as a direct constraint on Population III star formation
• The Late Reionization of Filaments
• Constraining Reionization with the $z\sim 5-6$ Lyman-$\alpha$ Forest Power Spectrum: the Outlook after Planck
• The role of galaxies and AGN in reionizing the IGM - II: metal-tracing the faint sources of reionization at $5\lesssim z\lesssim 6$
• The VLT LBG Redshift Survey - V. Characterising the z = 3.1 Lyman Alpha Emitter Population
• On the faint-end of the galaxy luminosity function in the Epoch of Reionization: updated constraints from the HST Frontier Fields
• Determining the Nature of Late Gunn-Peterson Troughs with Galaxy Surveys
• Faint end of the $z\sim 3-7$ luminosity function of Lyman-alpha emitters behind lensing clusters observed with MUSE
• Evidence for a highly opaque large-scale galaxy void at the end of reionization
• The CGM and IGM at z$\sim$5: metal budget and physical connection
• Large-scale environment of z~5.7 CIV absorption systems I: projected distribution of galaxies
• Large-scale environment of $z\sim 5.7$ CIV absorption systems -II. Spectroscopy of Lyman-$\alpha$ emitters
• Nurturing Lyman Break Galaxies: Observed link between environment and spectroscopic features
• Aligned metal absorbers and the ultraviolet background at the end of reionization
• A galaxy as the source of a Civ absorption system close to the epoch of reionization
• Probing the Metal Enrichment of the Intergalactic Medium at $z=5-6$ Using the Hubble Space Telescope
• Clumping factors of HII, HeII and HeIII
• Theoretical study of an LAE-CIV absorption pair at z = 5.7
• Cosmic Dawn: Studies of the Earliest Galaxies and Their Role in Cosmic Reionization

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• XQR-30: the ultimate XSHOOTER quasar sample at the reionization epoch
• The XQR-30 Metal Absorber Catalog: 778 Absorption Systems Spanning 2 < z < 6.5
• The evolution of the Si IV content in the Universe from the epoch of reionization to cosmic noon
• Evolution of CIV Absorbers I. The Cosmic Incidence
• Metal enrichment and evolution in four z > 6.5 quasar sightlines observed with JWST/NIRSpec
• Examining the Decline in the C IV Content of the Universe over 4.3 < z < 6.3 using the E-XQR-30 Sample
• Faint LAEs near z>4.7 CIV absorbers revealed by MUSE
• Into the Lyα jungle: exploring the circumgalactic medium of galaxies at z ~ 4-5 with MUSE
• The effects of binary stars on galaxies and metal-enriched gas during reionization
• A [C II] 158$\mu$m Emitter Associated with an OI Absorber at the End of the Reionization Epoch
• The environments and hosts of metal absorption at z>5
• Transverse clues on the kpc-scale structure of the circumgalactic medium as traced by C IV absorption
• A SPectroscopic survey of biased halos In the Reionization Era (ASPIRE): JWST Discovers an Overdensity around a Metal Absorption-selected Galaxy at $z\sim 5.5$
• Searching for [CII] Emission from the First Sample of $z\sim 6$ OI Absorption-Associated Galaxies with ALMA
• Assuming Ionization Equilibrium and the Impact on the Lyman-$\alpha$ Forest Power Spectrum during the End of Reionization at $8\ge z\ge 5$
• The Cosmic Evolution of CIV Absorbers at $1.4<z<4.5$: Insights from $100,000$ Systems in DESI Quasars
• How far have metals reached? Reconciling statistical constraints and enrichment models at reionization
• The clustering of C IV and Si IV at the end of reionisation: A perspective from the E-XQR-30 survey
• Mapping the z>=5 SiIV Column Density Distribution onto the Galaxy Stellar Mass Function Using the Cumulative Absorption Cross Section
• Galaxy Proximate Damped Lyman-Alpha Systems and HI Reionization Topology in TECHNICOLOR DAWN