Massloss of galaxies due to a UV-background

Abstract

We perform cosmological hydrodynamic simulations to determine to what extent galaxies lose their gas due to photoheating from an ionizing background. We find that the characteristic mass at which haloes on average have lost half of their baryons is Mc ~ 6.5 x 10^9 Msun/h at z = 0, which corresponds to a circular velocity of 25 km/s. This is significantly lower than the filtering mass obtained by the linear theory, which is often used in semianalytical models of galaxy formation. We demonstrate it is the gas temperature at the virial radius which determines whether a halo can accrete gas. A simple model that follows the merger history of the dark matter progenitors, and where gas accretion is not allowed when this temperature is higher than the virial temperature of the halo, reproduces the results from the simulation remarkably well. This model can be applied to any reionization history, and is easy to incorporate in semianalytical models.

arXiv comment10 pages, 7figures, submitted to MNRAS, minor revision in reply to referee's comments

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• The impact and response of minihalos and the inter-halo medium on cosmic reionization
• Mass assembly history and infall time of the Fornax dwarf spheroidal galaxy
• The THESAN-ZOOM project: Population III star formation continues until the end of reionization
• Stellar Feedback and the Energy Budget of Late-Type Galaxies: Missing Baryons and Core Creation
• GECO: Galaxy Evolution COde - A new semi-analytical model of galaxy formation
• Gas around galaxy haloes: methodology comparisons using hydrodynamical simulations of the intergalactic medium
• Fragmentation in Population III Galaxies formed through Ionizing Radiation
• Constraining SN feedback: a tug of war between reionization and the Milky Way satellites
• G.A.S. I: A prescription for turbulence-regulated star formation and its impact on galaxy properties
• Extreme Primordial Star Formation Enabled by High Redshift Quasars
• Statistical properties of substructures around Milky Way-sized haloes and their implications for the formation of stellar streams
• The Role of Quasar Radiative Feedback on Galaxy Formation during Cosmic Reionization
• Classification of cosmic structures for galaxies with deep learning: connecting cosmological simulations with observations
• Extending Semi-numeric Reionisation Models to the First Stars and Galaxies
• Probing the fluctuating Ultra-violet background using the Hubble Frontier Fields
• Prospects for Detecting Gaps in Globular Cluster Stellar Streams in External Galaxies with the Nancy Grace Roman Space Telescope
• Damped Lyman-$\alpha$ absorbers and atomic hydrogen in galaxies: the view of the GAEA model
• Probing the Early History of Cosmic Reionization by Future Cosmic Microwave Background Experiments
• GABE: Galaxy Assembly with Binary Evolution
• Ghostly Halos in Dwarf Galaxies: Constraints on the Star Formation Efficiency before Reionization
• Milky Way simulations: the Galaxy, its stellar halo and its satellites - insights from a hybrid cosmological approach
• Determining Satellite Infall Times Using Machine Learning
• PAC in DESI. I. Galaxy Stellar Mass Function into the $10^6{\mathrm{M}}_{\odot }$ Frontier
• The THESAN-ZOOM project: Star-formation efficiencies in high-redshift galaxies
• Small-scale clumping of dark matter and the mean free path of ionizing photons at $z=6$
• Detecting dark matter subhalos with the Nancy Grace Roman Space Telescope
• On the coldness of the local Hubble flow: the role of baryons
• The impact of filaments on dwarf galaxy properties in the Auriga simulations
• The Gas Accretion History of Low Mass Halos within the Cosmic Web from Cosmological Simulations
• The Chemical Evolution of Very Metal-Poor Damped Lyman-$\alpha$ Systems
• Probing the nature of Dark Matter through the metal enrichment of the intergalactic medium
• Joint 21-cm and CMB Forecasts for Constraining Self-Interacting Massive Neutrinos
• Diverse dark matter profiles in FIRE dwarfs: black holes, cosmic rays and the cusp-core enigma
• Investigating the Physics and Environment of Lyman Limit Systems in Cosmological Simulations
• MCMC determination of the cosmic UV background at $z\simeq 0$ from H$\alpha$ fluorescence
• The Lyman-alpha and Continuum Origins Survey II: the connection between the escape of ionizing radiation and Lyman-alpha halos in star-forming galaxies
• Calibrating excursion set reionization models to approximately conserve ionizing photons
• Understanding Dwarf Galaxies in order to Understand Dark Matter
• A general approach for testing non-cold dark matter at small cosmological scales
• Are there more galaxies than we see around high-$z$ quasars?
• Anatomy of galactic star formation history: Roles of different modes of gas accretion, feedback, and recycling
• Probing baryonic processes and gastrophysics in the formation of the Milky Way dwarf satellites: I. metallicity distribution properties
• Signatures of reionization feedback in the near-infrared background
• Constraining cosmology with the velocity function of low-mass galaxies
• The feedback of quasars on their galactic environment
• The influence of baryons on low-mass haloes
• An Improved Treatment of Cosmological Intergalactic Medium Evolution
• Evolution of dwarf galaxy observable parameters
• Exploring the Dependence of Gas Cooling and Heating Functions on the Incident Radiation Field with Machine Learning
• The variance of dispersion measure of high-redshift transient objects as a probe of ionized bubble size during reionization
• Evolution of dwarf spheroidal satellites in the common surface-density dark halos
• Gravitational wave backgrounds from coalescing black hole binaries at cosmic dawn: an upper bound
• Ultra-Faint Milky Way Satellites Discovered in Carina, Phoenix, and Telescopium with DELVE Data Release 3
• Cosmological prior for the $J$-factor estimation of dwarf spheroidal galaxies
• The Origin of the Stellar Mass-Stellar Metallicity Relation in the Milky Way Satellites and beyond
• Is the stellar mass-stellar metallicity relation universal in the Milky Way satellites and beyond?
• Born to be Starless: Revisiting the Missing Satellite Problem
• Star Formation for Predictive Primordial Galaxy Formation
• Quenching Global Star Formation: Dominance of Gravitational Shock Heating at z<2
• Estimating the evolution of gas in the Fornax dwarf spheroidal galaxy from its star formation history: an illustrative example
• Semi-Analytic Modeling of Dark Matter Subhalo Encounters with Thin Stellar Streams: Statistical Predictions for GD-1-like Streams in CDM
• HI-bearing dark galaxies predictions from constrained Local Group simulations: how many and where to find them
• HI-selected Galaxies as a probe of Quasar Absorption Systems
• Aeos: The Impact of Population III Initial Mass Function and Star-by-Star Models in Galaxy Simulations
• ODIN: Using multiplicity of Lyman-Alpha Emitters to assess star formation activity in dark matter halos
• Galaxy Properties at the Faint End of the HI Mass Function
• Cosmological Simulations of Satellites around Isolated Dwarf Galaxies
• Determining the primordial helium abundance and UV background using fluorescent emission in star-free dark matter haloes
• Revealing the formation histories of the first stars with the cosmic near-infrared background
• Using Strong Lensing to Detect Subhalos with Steep Inner Density Profiles
• Cosmic Reionization On Computers: Baryonic Effects on Halo Concentrations During the Epoch of Reionization
• An Estimate of the Impact of Reionization on Supermassive Black Hole Growth
• CROCODILE-DWARF: Assembly and Kinematics of Field Dwarf Galaxies with GADGET4-OSAKA
• Sample Variance Denoising in Cylindrical 21-cm Power Spectra
• It's Always Darkest Before the Cosmic Dawn: Early Results from Novel Tools and Telescopes for 21 cm Cosmology
• Bulgeless Evolution And the Rise of Discs (BEARD) III. A numerical simulation view of satellites around Milky-Way analogues
• Mapping the z>=5 SiIV Column Density Distribution onto the Galaxy Stellar Mass Function Using the Cumulative Absorption Cross Section
• Forward-modelling the Luminosity, Distance, and Size distributions of the Milky Way Satellites