The statistical properties of stars at redshift, z=5, compared with the present epoch

Abstract

We report the statistical properties of stars and brown dwarfs obtained from three radiation hydrodynamical simulations of star cluster formation with metallicities of 1, 1/10 and 1/100 of the solar value. The star-forming clouds are subjected to cosmic microwave background radiation that is appropriate for star formation at a redshift z=5. The results from the three calculations are compared to each other, and to similar previously published calculations that had levels of background radiation appropriate for present-day (z=0) star formation. Each of the calculations treat dust and gas temperatures separately and include a thermochemical model of the diffuse interstellar medium. We find that whereas the stellar mass distribution is insensitive to the metallicity for present-day star formation, at z=5 the characteristic stellar mass increases with increasing metallicity and the mass distribution has a deficit of brown dwarfs and low-mass stars at solar metallicity compared to the Galactic initial mass function. We also find that the multiplicity of M-dwarfs decreases with increasing metallicity at z=5. These effects are a result of metal-rich gas being unable to cool to as low temperatures at z=5 compared to at z=0 due to the hotter cosmic microwave background radiation, which inhibits fragmentation at high densities.

arXiv commentAccepted for publication in MNRAS. 21 pages, 15 figures. 12 animations available at: http://www.astro.ex.ac.uk/people/mbate/Cluster/clusterRedshift5.html. arXiv admin note: substantial text overlap with arXiv:1901.03713

References in corpus (116)

• On the variation of the Initial Mass Function
• A Survey of Stellar Families: Multiplicity of Solar-Type Stars
• A Universal Stellar Initial Mass Function? A Critical Look at Variations
• Modelling Accretion in Protobinary Systems
• Density, Velocity, and Magnetic Field Structure in Turbulent Molecular Cloud Models
• The Formation of a Star Cluster: Predicting the Properties of Stars and Brown Dwarfs
• SPLASH: An interactive visualisation tool for Smoothed Particle Hydrodynamics simulations
• The Atlas3D project - XX. Mass-size and mass-sigma distributions of early-type galaxies: bulge fraction drives kinematics, mass-to-light ratio, molecular gas fraction and stellar initial mass function
• The Stellar Population Histories of Early-Type Galaxies. II. Controlling Parameters of the Stellar Populations
• A systematic variation of the stellar initial mass function in early-type galaxies
• Forming the First Stars in the Universe: The Fragmentation of Primordial Gas
• The Sloan Lens ACS Survey. X. Stellar, Dynamical, and Total Mass Correlations of Massive Early-type Galaxies
• The Fundamental Plane for cluster E and S0 galaxies
• The Formation and Fragmentation of Primordial Molecular Clouds
• Stellar, brown dwarf and multiple star properties from a radiation hydrodynamical simulation of star cluster formation
• A Substantial Population of Low Mass Stars in Luminous Elliptical Galaxies
• The Stellar Initial Mass Function in Early-Type Galaxies From Absorption Line Spectroscopy. II. Results
• The Atlas3D Project - XXX. Star formation histories and stellar population scaling relations of early-type galaxies
• Early Star Formation and the Evolution of the Stellar Initial Mass Function in Galaxies
• Stellar, Brown Dwarf, and Multiple Star Properties from Hydrodynamical Simulations of Star Cluster Formation
• Evolution of Massive Protostars with High Accretion Rates
• The initial mass function of early-type galaxies
• A new chemo-evolutionary population synthesis model for early-type galaxies. I: Theoretical basis
• Ages and metallicities of early-type galaxies in the SDSS: new insight into the physical origin of the colour-magnitude and the Mg2-sigmaV relations
• The SAURON project - XVII. Stellar population analysis of the absorption line strength maps of 48 early-type galaxies
• Detection of Nine M8.0-L0.5 Binaries: The Very Low Mass Binary Population and its Implications for Brown Dwarf and VLM Star Formation
• The initial mass function : from Salpeter 1955 to 2005
• An energy-conserving formalism for adaptive gravitational force softening in SPH and N-body codes
• On the diversity and statistical properties of protostellar discs
• The VLA/ALMA Nascent Disk and Multiplicity (VANDAM) Survey of Orion Protostars. A Statistical Characterization of Class 0 and I Protostellar Disks
• Protostellar Collapse with Various Metallicities
• The Formation of Close Binary Systems by Dynamical Interactions and Orbital Decay
• SPIDER VIII - Constraints on the Stellar Initial Mass Function of Early-type Galaxies from a Variety of Spectral Features
• The Importance of Radiative Feedback for the Stellar Initial Mass Function
• Counting Low-Mass Stars in Integrated Light
• Long-Baseline Interferometric Multiplicity Survey of the Sco-Cen OB Association
• The Close Binary Fraction of Solar-type Stars is Strongly Anti-correlated with Metallicity
• Two-dimensional kinematics of SLACS lenses: III. Mass structure and dynamics of early-type lens galaxies beyond z ~ 0.1
• Galaxy And Mass Assembly (GAMA): The star formation rate dependence of the stellar initial mass function
• Global Relationships Among the Physical Properties of Stellar Systems
• The AstraLux Large M-dwarf Multiplicity Survey
• Systematic variation of the stellar Initial Mass Function with velocity dispersion in early-type galaxies
• A new chemo-evolutionary population synthesis model for early-type galaxies. II: Observations and Results
• Radiation-Hydrodynamic Simulations of the Formation of Orion-Like Star Clusters II. The Initial Mass Function from Winds, Turbulence, and Radiation
• The thermodynamics of collapsing molecular cloud cores using smoothed particle hydrodynamics with radiative transfer
• Evidence For A Mild Steepening And Bottom-Heavy IMF In Massive Galaxies From Sodium And Titanium-Oxide Indicators
• STARFORGE: Toward a comprehensive numerical model of star cluster formation and feedback
• The Fragmentation of Magnetized, Massive Star-Forming Cores with Radiative Feedback
• The stellar IMF determined in early-type galaxies from a non-degenerate set of optical line indices
• The Stellar Initial Mass Function in Early-Type Galaxies from Absorption Line Spectroscopy. III. Radial Gradients
• The VLA Nascent Disk And Multiplicity Survey of Perseus Protostars (VANDAM). IV. Free-Free Emission from Protostars: Links to Infrared Properties, Outflow Tracers, and Protostellar Disk Masses
• Near-IR line-strengths in elliptical galaxies: evidence for IMF variations?
• Modelling CO formation in the turbulent interstellar medium
• The dust temperature distribution in prestellar cores
• Dynamical masses of early-type galaxies: a comparison to lensing results and implications for the stellar IMF and the distribution of dark matter
• The dynamics and outcome of star formation with jets, radiation, winds, and supernovae in concert
• Stellar Multiplicity Meets Stellar Evolution And Metallicity: The APOGEE View
• Dissecting the Red Sequence--I. Star Formation Histories of Quiescent Galaxies: The Color-Magnitude vs. the Color-Sigma Relation
• Smoothed Particle Magnetohydrodynamics III. Multidimensional tests and the div B = 0 constraint
• Star Clusters in M31: V. Internal Dynamical Trends: Some Troublesome, Some Reassuring
• Dissecting the Red Sequence--II. Star Formation Histories of Early-Type Galaxies Throughout the Fundamental Plane
• A Survey for Spectroscopic Binaries Among Very Low-Mass Stars
• Star formation in metal-poor gas clouds
• Radiation-Hydrodynamic Simulations of the Formation of Orion-Like Star Clusters I. Implications for the Origin of the Initial Mass Function
• The Different Structures of the Two Classes of Starless Cores
• Star Cluster Formation in Turbulent, Magnetized Dense Clumps with Radiative and Outflow Feedback
• A faster algorithm for smoothed particle hydrodynamics with radiative transfer in the flux-limited diffusion approximation
• The SINFONI Nearby Elliptical Lens Locator Survey: Discovery of two new low-redshift strong lenses and implications for the initial mass function in giant early-type galaxies
• An inventory of the stellar initial mass function in early-type galaxies
• The statistical properties of stars and their dependence on metallicity
• The statistical properties of stars and their dependence on metallicity: the effects of opacity
• Universal IMF vs dark halo response in early-type galaxies: breaking the degeneracy with the fundamental plane
• Confirmation of Enhanced Dwarf-sensitive Absorption Features in the Spectra of Massive Elliptical Galaxies: Further Evidence for a Non-universal Initial Mass Function
• A giant elliptical galaxy with a lightweight initial mass function
• The (galaxy-wide) IMF in giant elliptical galaxies: From top to bottom
• Stellar and total mass in early-type lensing galaxies
• STARFORGE: The effects of protostellar outflows on the IMF
• There is no magnetic braking catastrophe: Low-mass star cluster and protostellar disc formation with non-ideal magnetohydrodynamics
• IMF and [Na/Fe] abundance ratios from optical and NIR Spectral Features in Early-type Galaxies
• The wide binary fraction of solar-type stars: emergence of metallicity dependence at a < 200 AU
• Effects of the environment and feedback physics on the initial mass function of stars in the STARFORGE simulations
• Unveiling dark halos in lensing galaxies
• The Effects of Magnetic Fields and Protostellar Feedback on Low-mass Cluster Formation
• Evidence for a non-universal stellar initial mass function in low-redshift high-density early-type galaxies
• Galactic Winds and the Photo-chemical Evolution of Elliptical Galaxies: The Classic Model Revisited
• The stellar initial mass function in red-sequence galaxies: 1-micron spectroscopy of Coma Cluster galaxies with Subaru/FMOS
• Resolution requirements for simulating gravitational fragmentation using SPH
• The Initial Mass Function in the Nearest Strong Lenses from SNELLS: Assessing the Consistency of Lensing, Dynamical, and Spectroscopic Constraints
• Simulating Star Clusters Across Cosmic Time: I. Initial Mass Function, Star Formation Rates and Efficiencies
• Spatially resolved variations of the IMF mass normalisation in early-type galaxies as probed by molecular gas kinematics
• Further evidence for large central mass-to-light ratios in early-type galaxies: the case of ellipticals and lenticulars in the Abell~262 cluster
• Further evidence for a time-dependent initial mass function in massive early-type galaxies
• What Physics Determines the Peak of the IMF? Insights from the Structure of Cores in Radiation-Magnetohydrodynamic Simulations
• Strong Gravitational Lensing and the Stellar IMF of Early-type Galaxies
• Connection between dynamically derived IMF normalisation and stellar population parameters
• The Protostellar Mass Function
• Binary star formation from ring fragmentation
• Is molecular cloud turbulence driven by external supernova explosions?
• Metallicity and the Universality of the IMF
• Infall Models of Elliptical Galaxies: Further Evidence for a Top-Heavy Initial Mass Function
• Cosmological Implications of a Stellar Initial Mass Function that Varies with the Jeans Mass in Galaxies
• Biases in the inferred mass-to-light ratio of globular clusters: no need for variations in the stellar mass function
• Constraining the low-mass end of the Initial Mass Function with Gravitational Lensing
• The IMF and multiplicity of stars from gravity, turbulence, magnetic fields, radiation and outflow feedback
• Combining radiative transfer and diffuse interstellar medium physics to model star formation
• The Metallicity of Stars with Close Companions
• The near-IR Ca II triplet - sigma relation for bulges of spiral galaxies
• Is it possible to reconcile extragalactic IMF variations with a universal Milky Way IMF?
• The role of the turbulence driving mode for the Initial Mass Function
• On the effects of solenoidal and compressive turbulence in prestellar cores
• The Influence of Galaxy Environment on the Stellar Initial Mass Function of Early-Type Galaxies
• Testing the Turbulent Origin of the Stellar Initial Mass Function
• Sink particle radiative feedback in smoothed particle hydrodynamics models of star formation
• The X-shooter Lens Survey - II. Sample presentation and spatially resolved kinematics
• The statistical properties of protostellar discs and their dependence on metallicity
• The dependence of stellar properties on initial cloud density

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