Constraint on Matter Power Spectrum on $10^6-10^9{M}_{\odot }$ Scales from ${\tau }_e$

Abstract

An analysis of the physics-rich endgame of reionization at $z=5.7$ is performed, utilizing jointly the observations of the Ly$\alpha$ forest, the mean free path of ionizing photons, the luminosity function of galaxies and new physical insight. We find that an upper limit on ${\tau }_{\mathrm{e}}$ provides a constraint on the minimum mean free path (of ionizing photons) that is primarily due to dwarf galaxies, which in turn yields a new and yet the strongest constraint on the matter power spectrum on $10^6-10^9{M}_{\odot }$ scales. With the latest Planck measurements of ${\tau }_{\mathrm{e}}=0.055\pm 0.009$, we can place an upper limit of $(8.9\times 10^6,3.8\times 10^7,4.2\times 10^8)M_{\odot }$ on the lower cutoff mass of the halo mass function, or equivalent a lower limit on warm dark matter particle mass ${\mathrm{m}}_{\mathrm{x}}\ge (15.1,9.8,4.6)\mathrm{keV}$ or on sterile neutrino mass ${\mathrm{m}}_{\mathrm{s}}\ge (161,90,33)\mathrm{keV}$, at $(1,1.4,2.2)\sigma$ confidence level, respectively.

32 pages, 9 figures, accepted for publication in the Astrophysical Journal

References in corpus (21)

• UV Luminosity Functions at redshifts z~4 to z~10: 10000 Galaxies from HST Legacy Fields
• Escape fraction of ionizing photons during reionization: effects due to supernova feedback and runaway OB stars
• The galaxy stellar mass function at 3.5<z<7.5 in the CANDELS/UDS, GOODS-South, and HUDF fields
• Line Emitting Galaxies Beyond a Redshift of 7: An Improved Method for Estimating the Evolving Neutrality of the Intergalactic Medium
• HeII Reionization and its Effect on the IGM
• Keeping the Universe ionised: Photo-heating and the clumping factor of the high-redshift intergalactic medium
• The Evolution of Stellar Mass and the Implied Star Formation History
• Rapid Decline of Lyman-alpha Emission Toward the Reionization Era
• Identification of the brightest Lyα emitters at z=6.6: implications for the evolution of the luminosity function in the re-ionisation era
• Are we witnessing the epoch of reionisation at $z=7.1$ from the spectrum of J1120+0641?
• Resonantly-Produced 7 keV Sterile Neutrino Dark Matter Models and the Properties of Milky Way Satellites
• Minihalo photoevaporation during cosmic reionization: evaporation times and photon consumption rates
• Lyα emission line reconstruction for high-$z$ QSOs
• Luminosity Functions of Lyman Alpha Emitting Galaxies and Cosmic Reionization of Hydrogen
• The End of Helium Reionization at z~2.7 Inferred from Cosmic Variance in HST/COS HeII Lyman Alpha Absorption Spectra
• An Ultraluminous Lyman Alpha Emitter with a Blue Wing at z=6.6
• Quantifying Distributions of Lyman Continuum Escape Fraction
• Relic Gravity Waves and 7 keV Dark Matter from a GeV scale inflaton
• A New Constraint on the Ly$\alpha$ Fraction of UV Very Bright Galaxies at Redshift 7
• Is the Concentration of Dark Matter Halos at Virialization Universal ?
• A 52 hours VLT/FORS2 spectrum of a bright z~7 HUDF galaxy: no Ly-alpha emission

Cited by in corpus (3)

• Substructure of fuzzy dark matter haloes
• Dark matter model favoured by reionization data: 7 keV sterile neutrino vs cold dark matter
• Influence of the deviation of the matter power spectrum at small scales on the global 21-cm signal at cosmic dawn