The impact of chemistry on the structure of high-z galaxies

Abstract

To improve our understanding of high-z galaxies we study the impact of H${}_2$ chemistry on their evolution, morphology and observed properties. We compare two zoom-in high-resolution (30 pc) simulations of prototypical $M_{\star }\sim 10^{10}{\mathrm{M}}_{\odot }$ galaxies at $z=6$. The first, "Dahlia", adopts an equilibrium model for H${}_2$ formation, while the second, "Althæa", features an improved non-equilibrium chemistry network. The star formation rate (SFR) of the two galaxies is similar (within 50\%), and increases with time reaching values close to 100 ${\mathrm{M}}_{\odot }/\mathrm{yr}$ at $z=6$. They both have SFR-stellar mass relation consistent with observations, and a specific SFR of $\simeq 5{\mathrm{Gyr}}^{-1}$. The main differences arise in the gas properties. The non-equilibrium chemistry determines the H$\to$ H${}_2$~transition to occur at densities $>300{cm}^{-3}$, i.e. about 10 times larger than predicted by the equilibrium model used for Dahlia. As a result, Althæa features a more clumpy and fragmented morphology, in turn making SN feedback more effective. Also, because of the lower density and weaker feedback, Dahlia sits $3\sigma$ away from the Schmidt-Kennicutt relation; Althæa, instead nicely agrees with observations. The different gas properties result in widely different observables. Althæa outshines Dahlia by a factor of 7 (15) in [CII]~$157.74\mu \mathrm{m}$ (H${}_2$~$17.03\mu \mathrm{m}$) line emission. Yet, Althæa is under-luminous with respect to the locally observed [CII]-SFR relation. Whether this relation does not apply at high-z or the line luminosity is reduced by CMB and metallicity effects remains as an open question.

arXiv comment18 pages, 13 Figures 1 Table, accepted for publication in MNRAS

References in corpus (117)

• The chemical composition of the Sun
• On the variation of the Initial Mass Function
• Planck 2013 results. XVI. Cosmological parameters
• The Global Schmidt Law in Star Forming Galaxies
• Starburst99: Synthesis Models for Galaxies with Active Star Formation
• Cosmic Star Formation History
• Star Formation in the Milky Way and Nearby Galaxies
• The Average Star Formation Histories of Galaxies in Dark Matter Halos from z=0-8
• Cosmological Hydrodynamics with Adaptive Mesh Refinement: a new high resolution code called RAMSES
• 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
• FIRE-2 Simulations: Physics versus Numerics in Galaxy Formation
• The Neutral Atomic Phases of the ISM in the Galaxy
• Cool Gas in High Redshift Galaxies
• High molecular gas fractions in normal massive star forming galaxies in the young Universe
• A Study of the Gas-Star Formation Relation over Cosmic Time
• Very High Gas Fractions and Extended Gas Reservoirs in z=1.5 Disk Galaxies
• Enzo: An Adaptive Mesh Refinement Code for Astrophysics
• Multi-scale initial conditions for cosmological simulations
• On the Star Formation Rates in Molecular Clouds
• Star Formation and Feedback in Smoothed Particle Hydrodynamic Simulations--I. Isolated Galaxies
• Different star formation laws for disks versus starbursts at low and high redshifts
• A KInetic Database for Astrochemistry (KIDA)
• A Universal, Local Star Formation Law in Galactic Clouds, Nearby Galaxies, High-Redshift Disks, and Starbursts
• The Energy Dissipation Rate of Supersonic, Magnetohydrodynamic Turbulence in Molecular Clouds
• On the evolution of the HI column density distribution in cosmological simulations
• The Star Formation Rate and Gas Surface Density Relation in the Milky Way: Implications for Extragalactic Studies
• Towards a complete accounting of energy and momentum from stellar feedback in galaxy formation simulations
• The Interstellar Medium In Galaxies Seen A Billion Years After The Big Bang
• The Atomic to Molecular Transition in Galaxies. II: HI and H_2 Column Densities
• The Aquila comparison Project: The Effects of Feedback and Numerical Methods on Simulations of Galaxy Formation
• The applicability of FIR fine-structure lines as Star Formation Rate tracers over wide ranges of metallicities and galaxy types
• The 2013 Release of Cloudy
• Cusp-core transformations in dwarf galaxies: observational predictions
• Galaxy Evolution in Cosmological Simulations with Outflows II: Metallicities and Gas Fractions
• On the Star Formation Efficiency of Turbulent Magnetized Clouds
• On the effect of the Cosmic Microwave Background in high-redshift (sub-)millimeter observations
• Star Formation Efficiencies and Lifetimes of Giant Molecular Clouds in the Milky Way
• A dusty, normal galaxy in the epoch of reionization
• Atomic data for astrophysics. I. Radiative recombination rates for H-like, He-like, Li-like and Na-like ions over a broad range of temperature
• Grackle: a Chemistry and Cooling Library for Astrophysics
• Dust in the reionization era: ALMA observations of a $z$=8.38 Galaxy
• On the onset of galactic winds in quiescent star forming galaxies
• Supernova Feedback in an Inhomogeneous Interstellar Medium
• The Stellar Mass Density and Specific Star Formation Rate of the Universe at z~7
• The History of the Baryon Budget: Cosmic Logistics in a Hierarchical Universe
• Dynamical Properties of z~2 Star Forming Galaxies and a Universal Star Formation Relation
• KROME - a package to embed chemistry in astrophysical simulations
• Minkowski Functionals used in the Morphological Analysis of Cosmic Microwave Background Anisotropy Maps
• The Herschel Dwarf Galaxy Survey: I. Properties of the low-metallicity ISM from PACS spectroscopy
• The assembly of "normal" galaxies at z=7 probed by ALMA
• Detection of an oxygen emission line from a high redshift galaxy in the reionization epoch
• Photodissociation of H2 in Protogalaxies: Modeling Self-Shielding in 3D Simulations
• Dust formation history of galaxies: a critical role of metallicity for the dust mass growth by accreting materials in the interstellar medium
• The Atomic to Molecular Transition in Galaxies. I: An Analytic Approximation for Photodissociation Fronts in Finite Clouds
• On the interplay between star formation and feedback in galaxy formation simulations
• Radiative feedback and the low efficiency of galaxy formation in low-mass haloes at high redshift
• Beyond genus statistics: a unifying approach to the morphology of cosmic structure
• On the [CII]-SFR relation in high redshift galaxies
• The Meaning and Consequences of Star Formation Criteria in Galaxy Models with Resolved Stellar Feedback
• An Intensely Star-Forming Galaxy at z~7 with Low Dust and Metal Content Revealed by Deep ALMA and HST Observations
• Intensity Mapping of the [CII] Fine Structure Line during the Epoch of Reionization
• The Birth of a Galaxy. II. The Role of Radiation Pressure
• A Simple Law of Star Formation
• The Atomic-to-Molecular Transition in Galaxies. III. A New Method for Determining the Molecular Content of Primordial and Dusty Clouds
• Modelling the supernova-driven ISM in different environments
• Tracing the reionization epoch with ALMA: [CII] emission in z~7 galaxies
• Warm molecular hydrogen in the Spitzer SINGS galaxy sample
• Star formation and the interstellar medium in z>6 UV-luminous Lyman-break galaxies
• The AGORA High-Resolution Galaxy Simulations Comparison Project. II: Isolated Disk Test
• Electron-Ion Recombination on Grains and Polycyclic Aromatic Hydrocarbons
• Zooming on the internal structure of $z\simeq 6$ galaxies
• Simulating cosmic metal enrichment by the first galaxies
• Ionized gaseous nebulae chemical abundance determination using the direct method
• [CII] emission in z ~ 6 strongly lensed, star-forming galaxies
• Interpreting ALMA Observations of the ISM During the Epoch of Reionisation
• Velocity-resolved [CII] emission and [CII]/FIR Mapping along Orion with Herschel
• Galaxies that Shine: radiation-hydrodynamical simulations of disk galaxies
• Non-universal star formation efficiency in turbulent ISM
• ALMA Observation of 158 micron [CII] Line and Dust Continuum of a z=7 Normally Star-forming Galaxy in the Epoch of Reionization
• Effects of dust grains on early galaxy evolution
• Cosmic-ray and X-ray Heating of Interstellar Clouds and Protoplanetary Disks
• ALMA [CII] detection of a redshift 7 lensed galaxy behind RXJ1347.1-1145
• Snap, Crackle, Pop: sub-grid supernova feedback in AMR simulations of disk galaxies
• Non-equilibrium chemistry and cooling in the diffuse interstellar medium - II. Shielded gas
• A Systematic Look at the Effects of Radiative Feedback on Disc Galaxy Formation
• New constraints on dust emission and UV attenuation of z=6.5-7.5 galaxies from millimeter observations
• ALMA suggests outflows in z~5.5 galaxies
• Introducing the FirstLight project: UV luminosity function and scaling relations of primeval galaxies
• HD and H2 formation in low-metallicity dusty gas clouds at high redshift
• FIR line emission from high redshift galaxies
• The morphology of cosmological reionization by means of Minkowski Functionals
• An instability of feedback regulated star formation in galactic nuclei
• Molecular clouds photoevaporation and FIR line emission
• A search for CII-158$\mu$m line emission in HCM\,6A, a Lyman-$\alpha$ emitter at $z=6.56$
• Evolution of Li, Be and B in the Galaxy
• Studying topological structure in the epoch of reionization with 3D-Minkowski functionals of 21cm line fluctuations
• Semi analytic approach to understanding the distribution of neutral hydrogen in the universe
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• Young and turbulent: the early life of massive galaxy progenitors
• A chemical model for the interstellar medium in galaxies
• The roles of stellar feedback and galactic environment in star forming molecular clouds
• A detailed framework to incorporate dust in hydrodynamical simulations
• Origin of Cosmic Chemical Abundances
• Mapping metals at high redshift with far-infrared lines
• The circumgalactic medium of high redshift galaxies
• Galactic outflow and diffuse gas properties at z>=1 using different baryonic feedback models
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• Detecting the First Objects in the Mid-IR with NGST
• Radiative feedback and cosmic molecular gas: the role of different radiative sources
• What can emission lines tell us?
• Radiative feedback and cosmic molecular gas: numerical method
• Effect of Cosmic UV Background on Star Formation in High Redshift Galaxies
• Notes on Star Formation
• Limits on Intergalactic Dust During Reionization
• What can distant galaxies teach us about massive stars?

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