What is the Halo Mass Function in a Fuzzy Dark Matter Cosmology?

Abstract

Fuzzy dark matter (FDM) or wave dark matter is an alternative theory designed to solve the small-scale problems faced by the standard cold dark matter proposal for the primary material component of the universe. It is made up of ultra-light axions having mass $\sim 10^{-22}$ eV that typically have de Broglie wavelength of several kpc, alleviating some of the apparent small-scale discrepancies faced by the standard $\Lambda$CDM paradigm. In this paper, we calculate the halo mass function for the fuzzy dark matter using a sharp-k window function and compare it with one calculated using numerical simulations, finding the peak mass at roughly $10^{10}{M}_{\odot }$ for a particle mass of $2\times 10^{-22}$ eV. We also constrain the mass of FDM particle to be $⪆2\times 10^{-22}$ eV using the observations of high-redshift ($z\sim 10$) lensed galaxies from CLASH survey.

7 pages, 6 figures, accepted for publication in MNRAS

References in corpus (9)

• Ultralight scalars as cosmological dark matter
• Too big to fail? The puzzling darkness of massive Milky Way subhaloes
• Cosmic Structure as the Quantum Interference of a Coherent Dark Wave
• Understanding the Core-Halo Relation of Quantum Wave Dark Matter, $\psi$DM, from 3D Simulations
• Does the Fornax dwarf spheroidal have a central cusp or core?
• Lyman-alpha Constraints on Ultralight Scalar Dark Matter: Implications for the Early and Late Universe
• Galaxy UV-luminosity function and reionization constraints on axion dark matter
• Structure formation in large-volume cosmological simulations of fuzzy dark matter: Impact of the non-linear dynamics
• Substructure of fuzzy dark matter haloes

Cited by in corpus (11)

• Structure formation in large-volume cosmological simulations of fuzzy dark matter: Impact of the non-linear dynamics
• Quantum fluctuations masquerade as halos: Bounds on ultra-light dark matter from quadruply-imaged quasars
• The halo mass function and filaments in full cosmological simulations with fuzzy dark matter
• Parasitic black holes: the swallowing of a fuzzy dark matter soliton
• Cosmological structure formation in scalar field dark matter with repulsive self-interaction: The Incredible Shrinking Jeans Mass
• Microlensing of gravitational waves by dark matter structures
• ALP Dark Matter Mini-Clusters from Kinetic Fragmentation
• Discriminating power of milli-lensing observations for dark matter models
• If dark matter is fuzzy, the first stars form in massive pancakes
• Constraining Ultra-light Axions with Galaxy Cluster Number Counts
• Impact of a Rapid Diluted Energy Density on the halo mass function