First star formation with dark matter annihilation

Abstract

We include an energy term based on Dark Matter (DM) self-annihilation during the cooling and subsequent collapse of the metal-free gas, in halos hosting the formation of the first stars in the Universe. We have found that the feedback induced on the chemistry of the cloud does modify the properties of the gas throughout the collapse. However, the modifications are not dramatic, and the typical Jeans mass within the halo is conserved throughout the collapse, for all the DM parameters we have considered. This result implies that the presence of Dark Matter annihilations does not substantially modify the Initial Mass Function of the First Stars, with respect to the standard case in which such additional energy term is not taken into account. We have also found that when the rate of energy produced by the DM annihilations and absorbed by the gas equals the chemical cooling (at densities yet far from the actual formation of a proto-stellar core) the structure does not halt its collapse, although that proceeds more slowly by a factor smaller than few per cent of the total collapse time.

12 pages, 8 figures, 3 tables; replaced with published version after minor changes

References in corpus (22)

• CMB constraints on Dark Matter models with large annihilation cross-section
• Population III star formation in a Lambda CDM universe, I: The effect of formation redshift and environment on protostellar accretion rate
• Dark matter and the first stars: a new phase of stellar evolution
• Low-temperature gas opacity - AESOPUS: a versatile and quick computational tool
• Star formation at very low metallicity. I: Chemistry and cooling at low densities
• Impact of dark matter decays and annihilations on reionization
• The Effects of Dark Matter Decay and Annihilation on the High-Redshift 21 cm Background
• Secondary ionization and heating by fast electrons
• The impacts of dark matter particle annihilation on recombination and the anisotropies of the cosmic microwave background
• The impact of dark matter decays and annihilations on the formation of the first structures
• Constraining DM through 21 cm observations
• The Zero Age Main Sequence of WIMP burners
• Dark Matter Capture in the First Stars: a Power Source and Limit on Stellar Mass
• Dark Stars: a new look at the First Stars in the Universe
• The formation and evolution of young low-mass stars within halos with high concentration of dark matter particles
• The Energy Cascade from Warm Dark Matter Decays
• The role of HD cooling in primordial star formation
• Intergalactic medium heating by dark matter
• Impact of Dark Matter Annihilation on the High-Redshift Intergalactic Medium
• Particle decay in the early universe: predictions for 21 cm
• Effect of dark matter annihilation on gas cooling and star formation
• Neutralino Annihilations and the Gas Temperature in the Dark Ages

Cited by in corpus (42)

• Simulations on a Moving Mesh: The Clustered Formation of Population III Protostars
• Formation of the First Stars
• Black hole formation from axion stars
• The Effects of Accretion Luminosity upon Fragmentation in the Early Universe
• The Growth of the Stellar Seeds of Supermassive Black Holes
• The Formation of the First Massive Black Holes
• Gravitational effects of condensate dark matter on compact stellar objects
• Formation of the first stars and black holes
• Predicting the locations of possible long-lived low-mass first stars: Importance of satellite dwarf galaxies
• Dark Stars: A Review
• The First Stars
• Dark-matter admixed white dwarfs
• Equilibrium Structure and Radial Oscillations of Dark Matter Admixed Neutron Stars
• Finding high-redshift dark stars with the James Webb Space Telescope
• Observing Dark Stars with JWST
• WIMP DM and first stars: suppression of fragmentation in primordial star formation
• Thermal conduction by dark matter with velocity and momentum-dependent cross-sections
• The capture of dark matter particles through the evolution of low-mass stars
• Generalised form factor dark matter in the Sun
• The First Stars: formation under X-ray feedback
• Formation of the first stars
• The Mutual Interaction Between Population III Stars and Self-Annihilating Dark Matter
• The WIMP capture process for dark stars in the early universe
• Signatures of dark matter burning in nuclear star clusters
• Dark Matter Admixed Type Ia Supernovae
• Reionization in the Warm Dark Matter Model
• Dark Stars: Improved Models and First Pulsation Results
• Impacts of Dark Stars on Reionization and Signatures in the Cosmic Microwave Background
• Updated constraints on velocity and momentum-dependent asymmetric dark matter
• Black Holes in our Galactic Halo: Compatibility with FGST and PAMELA Data and Constraints on the First Stars
• Double dark-matter admixed neutron star
• On the operation of the chemothermal instability in primordial star-forming clouds
• Effect of Population III Multiplicity on Dark Star Formation
• Pressure from dark matter annihilation and the rotation curve of spiral galaxies
• Heating of galactic gas by dark matter annihilation in ultracompact minihalos
• Supermassive black hole seeds from sub-keV dark matter
• Dark Stars and Boosted Dark Matter Annihilation Rates
• Constraint on dark matter annihilation with dark star formation using Fermi extragalactic diffuse gamma-ray background data
• Detectability of Supermassive Dark Stars with the Roman Space Telescope
• Dark Matter Annihilation Feedback in cosmological simulations I: Code convergence and idealised halos
• The Sun and stars: Giving light to dark matter
• The Effects of Dark Matter Annihilation and Dark Matter-Baryon Velocity Offsets at Cosmic Dawn