Cold gas in the early Universe. Survey for neutral atomic-carbon in GRB host galaxies at 1 < z < 6 from optical afterglow spectroscopy

Abstract

We present a survey for neutral atomic-carbon (CI) along gamma-ray burst (GRB) sightlines, which probes the shielded neutral gas-phase in the interstellar medium (ISM) of GRB host galaxies at high redshift. We compile a sample of 29 medium- to high-resolution GRB optical afterglow spectra spanning a redshift range through most of cosmic time from $1<z<6$. We find that seven ($\approx 25\%$) of the GRBs entering our statistical sample have CI detected in absorption. It is evident that there is a strong excess of cold gas in GRB hosts compared to absorbers in quasar sightlines. We investigate the dust properties of the GRB CI absorbers and find that the amount of neutral carbon is positively correlated with the visual extinction, $A_V$, and the strength of the 2175 Å dust extinction feature, $A_{\mathrm{bump}}$. GRBs with CI detected in absorption are all observed above a certain threshold of $\log N$(HI)$/{\mathrm{cm}}^{-2}$ + [X/H] > 20.7 and a dust-phase iron column density of $\log N$(Fe)${}_{\mathrm{dust}}/{\mathrm{cm}}^{-2}$ > 16.2. In contrast to the SED-derived dust properties, the strength of the CI absorption does not correlate with the depletion-derived dust properties. This indicates that the GRB CI absorbers trace dusty systems where the dust composition is dominated by carbon-rich dust grains. The observed higher metal and dust column densities of the GRB CI absorbers compared to H${}_2$- and CI-bearing quasar absorbers is mainly a consequence of how the two absorber populations are selected, but is also required in the presence of intense UV radiation fields in actively star-forming galaxies.

arXiv commentAccepted in A&A. 14 pages, 12 figures

References in corpus (96)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• Planck 2015 results. XIII. Cosmological parameters
• The chemical composition of the Sun
• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
• Interstellar Dust Grains
• Spectra and Light Curves of Gamma-Ray Burst Afterglows
• The Supernova -- Gamma-Ray Burst Connection
• The Fermi Gamma-Ray Burst Monitor
• A Quantitative Comparison of SMC, LMC, and Milky Way UV to NIR Extinction Curves
• X-shooter, the new wide band intermediate resolution spectrograph at the ESO Very Large Telescope
• A Unified Representation of Gas-Phase Element Depletions in the Interstellar Medium
• A glimpse of the end of the dark ages: the gamma-ray burst of 23 April 2009 at redshift 8.3
• GRB 090423 at a redshift of z~8.1
• A Photometric Redshift of z ~ 9.4 for GRB 090429B
• On the Estimation of Confidence Intervals for Binomial Population Proportions in Astronomy: The Simplicity and Superiority of the Bayesian Approach
• Low-Resolution Spectroscopy of Gamma-ray Burst Optical Afterglows: Biases in the Swift Sample and Characterization of the Absorbers
• The Afterglows of Swift-era Gamma-Ray Bursts. I. Comparing pre-Swift and Swift era Long/Soft (Type II) GRB Optical Afterglows
• UV star-formation rates of GRB host galaxies
• The VLT-UVES survey for molecular hydrogen in high-redshift damped Lyman-alpha systems
• The Star Formation Rate in the Reionization Era as Indicated by Gamma-ray Bursts
• Connecting the Gamma Ray Burst Rate and the Cosmic Star Formation History: Implications for Reionization and Galaxy Evolution
• The 2175 A dust feature in a Gamma Ray Burst afterglow at redshift 2.45
• The nature of "dark" gamma-ray bursts
• Swift Identification of Dark Gamma-Ray Bursts
• A Population of Massive, Luminous Galaxies Hosting Heavily Dust-Obscured Gamma-Ray Bursts: Implications for the Use of GRBs as Tracers of Cosmic Star Formation
• Molecular hydrogen in high-redshift Damped Lyman-alpha systems: The VLT/UVES database
• The Host Galaxies of Swift Dark Gamma-Ray Bursts: Observational Constraints on Highly Obscured and Very High-Redshift GRBs
• The SEDs and Host Galaxies of the dustiest GRB afterglows
• The VLT-UVES survey for molecular hydrogen in high-redshift damped Lyman-alpha systems: Physical conditions in the neutral gas
• The First Positive Detection of Molecular Gas in a GRB Host Galaxy
• Dust Extinction in High-z Galaxies with GRB Afterglow Spectroscopy - The 2175Å Feature at z=2.45
• Dissecting the Circumstellar Environment of Gamma-Ray Burst Progenitors
• Detection of the optical afterglow of GRB 000630: Implications for dark bursts
• The extinction curves of star-forming regions from z=0.1 to 6.7 using GRB afterglow spectroscopy
• A log N(HI) = 22.6 DLA in a dark gamma-ray burst: the environment of GRB 050401
• Dust-to-metal ratios in damped Lyman-alpha absorbers: Fresh clues to the origins of dust and optical extinction towards gamma-ray bursts
• The Troublesome Broadband Evolution of GRB 061126: Does a Grey Burst Imply Grey Dust?
• Dust extinction for an unbiased sample of GRB afterglows
• Rapid-Response Mode VLT/UVES spectroscopy of GRB060418: Conclusive evidence for UV pumping from the time evolution of FeII and NiII excited- and metastable-level populations
• Gamma-Ray Burst in a Molecular Cloud: Destruction of Dust and H2, and Emergent Spectrum
• Dust Depletion and Extinction in a Gamma-Ray Burst Afterglow
• The Dust Extinction Curves of Gamma-Ray Burst Host Galaxies
• Is atomic carbon a good tracer of molecular gas in metal-poor galaxies?
• The peculiar extinction law of SN2014J measured with The Hubble Space Telescope
• Physical conditions in high-redshift GRB-DLA absorbers observed with VLT/UVES: Implications for molecular hydrogen searches
• Evolution of the dust-to-metals ratio in high-redshift galaxies probed by GRB-DLAs
• Ly-alpha and UV emission from high-redshift GRB hosts: To what extent do GRBs trace star formation?
• Molecular Hydrogen in the Damped Lyman-alpha System towards GRB 120815A at z=2.36
• The warm, the excited, and the molecular gas: GRB 121024A shining through its star-forming galaxy
• Dust-depletion sequences in damped Lyman-α absorbers: a unified picture from low-metallicity systems to the Galaxy
• The properties of the 2175AA extinction feature discovered in GRB afterglows
• Metallicity as a criterion to select H2 bearing Damped Lyman-alpha systems
• Discovery of a Perseus-like cloud in the early Universe: HI-to-H2 transition, carbon monoxide and small dust grains at zabs=2.53 towards the quasar J0000+0048
• The dust obscuration bias in Damped Lyman alpha systems
• The metals-to-dust ratio to very low metallicities using GRB and QSO absorbers; extremely rapid dust formation
• Optical Classification of Gamma-Ray Bursts in the Swift Era
• Monster in the Dark: The Ultraluminous GRB 080607 and its Dusty Environment
• Unveiling the Secrets of Metallicity and Massive Star Formation Using DLAs along Gamma-ray Bursts
• VLT/X-shooter spectroscopy of the GRB 120327A afterglow
• Gamma-Ray Bursts Trace UV Metrics of Star Formation over 3 < z < 5
• Missing Molecular Hydrogen and the Physical Conditions of GRB Host Galaxies
• Extinction and metal column density of HI regions up to redshift z~2
• Optical/near-infrared selection of red QSOs: Evidence for steep extinction curves towards galactic centers?
• The mysterious optical afterglow spectrum of GRB140506A at z=0.889
• Molecular hydrogen absorption systems in Sloan Digital Sky Survey
• UVES/VLT high resolution spectroscopy of GRB 050730 afterglow: probing the features of the GRB environment
• VLT/X-shooter spectroscopy of the GRB 090926A afterglow
• Spotting high-z molecular absorbers using neutral carbon: Results from a complete spectroscopic survey with the VLT
• The properties of GRB 120923A at a spectroscopic redshift of z=7.8
• A quasar reddened by a sub-parsec sized, metal-rich and dusty cloud in a damped Lyman-alpha absorber at z=2.13
• Constraining the H${}_2$ column density distribution at z$\sim$3 from composite DLA spectra
• Spectrophotometric analysis of GRB afterglow extinction curves with X-shooter
• Dust Biasing of Damped Lyman Alpha Systems: a Bayesian Analysis
• The Molecular Hydrogen Deficit in Gamma-Ray Burst Afterglows
• VLT/X-shooter spectroscopy of the afterglow of the Swift GRB 130606A: Chemical abundances and reionisation at $z\sim 6$
• Rapid-response mode VLT/UVES spectroscopy of super iron-rich gas exposed to GRB 080310. Evidence of ionization in action and episodic star formation in the host
• Highly-ionized metals as probes of the circumburst gas in the natal regions of gamma-ray bursts
• The High A(V) Quasar Survey: Reddened quasi-stellar objects selected from optical/near-infrared photometry - II
• The elusive HI-> H2 transition in high-z damped Lyman-alpha systems
• VLT/X-shooter GRBs: Individual extinction curves of star-forming regions
• Dust reddening and extinction curves towards gamma-ray bursts at z > 4
• Neutral atomic-carbon QSO absorption-line systems at z>1.5: Sample selection, HI content, reddening, and 2175 A extinction feature
• Exploring dust extinction at the edge of reionization
• Dust extinction bias in the column density distribution of gamma-ray bursts; high column density, low redshift GRBs are more heavily obscured
• The extended High A(V) Quasar Survey: Searching for dusty absorbers toward mid-infrared selected quasars
• X-shooting GRBs at high redshift: probing dust production history
• Near Infrared spectroscopic observations of high redshift C~{\sc i} absorbers
• A Dusty Mg~II absorber Associated with the Quasar SDSS J003545.13+011441.2
• The 2175 Å extinction feature in the optical afterglow spectrum of GRB 180325A at z=2.25
• A quasar hiding behind two dusty absorbers. Quantifying the selection bias of metal-rich, damped Lyman-alpha absorption systems
• Steep extinction towards GRB 140506A reconciled from host galaxy observations: Evidence that steep reddening laws are local
• Quasar 2175 Å dust absorbers I: metallicity, depletion pattern, and kinematics
• The high A_V Quasar Survey: A z=2.027 metal-rich damped Lyman-alpha absorber towards a red quasar at z=3.21
• Quasar 2175 Å dust absorbers II: Correlation analysis and relationship with other absorption line systems
• X-shooter and ALMA spectroscopy of GRB 161023A - A study of metals and molecules in the line of sight towards a luminous GRB

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• Physical conditions in two high-redshift H${}_2$-bearing GRB-DLAs, 120815A and 121024A
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• A simple model of dust extinction in gamma-ray burst host galaxies
• Rapid Response Mode observations of GRB 160203A: Looking for fine-structure line variability at z=3.52
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