Chemical diversity of gas in distant galaxies: The metal and dust enrichment and variations within absorbing galaxies

Abstract

The chemical composition of gas in galaxies can be measured in detail from absorption spectroscopy. By studying gas in galaxies in this way, it is possible to investigate the small and faint galaxies, which are the most numerous in the universe. In particular, the chemical distribution of gas in absorbing systems gives us insight into cycles of gas in and around galaxies. Here we study chemical enrichment within 64 Damped Lyman-alpha Absorption (DLA) systems between $1.7<z<4.2$. We use high-resolution spectra from VLT/UVES to infer dust depletion from relative abundances of several metals. We perform a component-by-component analysis within DLAs, and characterise variations in their chemical enrichment. Unlike hydrogen, the metal columns can be characterised for individual components. We use them to derive the dust depletion ([Zn/Fe]fit), as an indicator for chemical enrichment. We find that some DLAs are chemically diverse within themselves, with [Zn/Fe]fit ranging up to 0.62 dex within a single system. This suggests that absorbing gas within these galaxies is chemically diverse. Although we do not find a clear trend of decreasing dust depletion with redshift, we do see that the most chemically enriched systems are at lower redshifts. We also observe evidence for dust-poor components at all redshifts, which may be due to the accretion of pristine gas onto galaxies. We combine the chemical and kinematic properties of the individual gas components and observe potential signatures of infalling gas, with low depletion at velocities below $\sim$100km/s, and outflows, with high depletion and velocities of $\sim$600km/s. We find over-abundances of alpha-elements (an enhancement of $\sim$0.3dex) and under-abundances of Mn in several components, which is likely a signature of core-collapse SNe nucleosythesis in the ISM. We observe these effects mostly at lower levels of chemical enrichment.

arXiv comment56 pages, 99 figures, Accepted for publication in A&A, Abstract abridged for arXiv

References in corpus (60)

• Star Formation Histories, Abundances and Kinematics of Dwarf Galaxies in the Local Group
• The Circumgalactic Medium
• A Unified Representation of Gas-Phase Element Depletions in the Interstellar Medium
• Nucleosynthesis Yields of Core-Collapse Supernovae and Hypernovae, and Galactic Chemical Evolution
• The chemical make-up of the Sun: A 2020 vision
• De Re Metallica: The cosmic chemical evolution of galaxies
• On the Kinematics of the Damped Lyman Alpha Protogalaxies
• The Cosmic Baryon and Metal Cycles
• Metallicity Evolution of Damped Lyman-alpha Systems out to z~5
• The Age-Metallicity Relation of the Universe in Neutral Gas: The First 100 Damped Lya Systems
• The galaxy stellar mass function at 3.5<z<7.5 in the CANDELS/UDS, GOODS-South, and HUDF fields
• Physical properties of galactic winds using background quasars
• Gas accretion as the origin of chemical abundance gradients in distant galaxies
• Signatures of Cool Gas Fueling a Star-Forming Galaxy at Redshift 2.3
• Velocity-Metallicity Correlation for high-z DLA Galaxies: Evidence for a Mass-Metallicity Relation?
• The UCSD HIRES/KeckI Damped Lya Abundance Database: II. The Implications
• Molecular hydrogen in high-redshift Damped Lyman-alpha systems: The VLT/UVES database
• The most metal-poor damped Lyman-alpha systems: Insights into chemical evolution in the very metal-poor regime
• Mapping metallicity variations across nearby galaxy disks
• Ionization Properties and Elemental Abundances in Damped Ly alpha Systems
• Consensus report on 25 years of searches for damped Ly$\alpha$ galaxies in emission: Confirming their metallicity-luminosity relation at $z\gtrsim 2$
• Verifying the mass-metallicity relation in damped Lyman-alpha selected galaxies at 0.1<z<3.2
• Predictions for the Angular Dependence of Gas Mass Flow Rate and Metallicity in the Circumgalactic Medium
• Localized starbursts in dwarf galaxies produced by impact of low metallicity cosmic gas clouds
• The Galactic radial abundance gradients of C, N, O, Ne, S, Cl and Ar from deep spectra of H II regions
• Dust depletion and abundance pattern in damped Lyman-alpha systems: a sample of Mn and Ti abundances at z<2.2
• A new comprehensive set of elemental abundances in DLAs - II. Data analysis and chemical variation studies
• The cosmic evolution of dust-corrected metallicity in the neutral gas
• Molecular hydrogen at z=1.973 toward Q0013-004: Dust depletion pattern in damped Lyman-alpha systems
• The NIRVANDELS Survey: a robust detection of $\alpha$-enhancement in star-forming galaxies at $z\simeq 3.4$
• Chemical abundances of Damped Ly alpha systems: A new method for estimating dust depletion effects
• 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
• Iron and alpha-element Production in the First One Billion Years after the Big Bang
• On the stellar masses of giant clumps in distant star-forming galaxies
• The Dynamics, Destruction, and Survival of Supernova-Formed Dust Grains
• The origin of dust in galaxies across cosmic time
• Large Metallicity Variations in the Galactic Interstellar Medium
• The Alpha-element knee of the Sagittarius Stream
• The Mass Inflow and Outflow Rates of the Milky Way
• Zinc in the Sculptor dwarf spheroidal galaxy
• The Chemical Uniformity of High z DLA Protogalaxies
• METAL: The Metal Evolution, Transport, and Abundance in the Large Magellanic Cloud Hubble program. II. Variations of interstellar depletions and dust-to-gas ratio within the LMC
• The mass-metallicity relation at cosmic noon in overdense environments: first results from the MAMMOTH-Grism HST slitless spectroscopic survey
• Dust depletion of metals from local to distant galaxies I: Peculiar nucleosynthesis effects and grain growth in the ISM
• New detections of Mn, Ti and Mg in damped Ly-alpha systems: Toward reconciling the dust/nucleosynthesis degeneracy
• Characterising the Circum-Galactic Medium of Damped Lyman-$\alpha$ Absorbing Galaxies
• MusE GAs FLOw and Wind (MEGAFLOW) V. The dust/metallicity-anisotropy of the Circum-Galactic Medium
• Metals and dust in the neutral ISM: the Galaxy, Magellanic Clouds, and damped Lyman-α absorbers
• H-alpha Imaging with HST+NICMOS of An Elusive Damped Ly-alpha Cloud at z=0.6
• Relative abundance pattern along the profile of high redshift Damped Lyman-alpha systems
• Resolved scaling relations and metallicity gradients on sub-kiloparsec scales at z=1
• Uncovering strong MgII absorbing galaxies: Imaging below the Lyman limit
• Metallicity has followed local gravitational potential of galaxies since z=3
• Gas inflow and outflow in an interacting high-redshift galaxy: The remarkable host environment of GRB 080810 at $z=3.35$
• HD 62542: Probing the Bare, Dense Core of a Translucent Interstellar Cloud
• Galaxies with Background QSOs, I: A Search for Strong Galactic H-alpha Lines
• Nature of the DLA towards Q0528-250: High pressure and strong UV field revealed by excitation of CI, H2 and SiII
• Exploring galaxy dark matter halos across redshifts with strong quasar absorbers
• Multiple origins for the DLA at $z_{\mathrm{abs}}=0.313$ toward PKS 1127$-$145 indicated by a complex dust depletion pattern of Ca, Ti, and Mn
• Remarkably high mass and high velocity dispersion of molecular gas associated with a regular, absorption-selected type-I quasar

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