Anisotropic cosmic optical background bound for decaying dark matter in light of the LORRI anomaly

Abstract

Recently anomalous flux in the cosmic optical background (COB) has been reported by the New Horizon observations. The COB flux is $16.37\pm 1.47\mathrm{nW}{\mathrm{m}}^{-2}\mathrm{s}{\mathrm{r}}^{-1}$, at the LORRI pivot wavelength of $0.608\mu \mathrm{m}$, which is $\sim 4\sigma$ level above the expected flux from the Hubble Space Telescope (HST) galaxy count. It would be great if this were a hint for the eV scale dark matter decaying into photons. In this paper, we point out that such a decaying dark matter model predicts a substantial amount of anisotropy in the COB flux, which is accurately measured by the HST. The data of the HST excludes the decay rate of the dominant cold dark matter larger than $10^{-24}$-$10^{-23}{\mathrm{s}}^{-1}$ in the mass range of $5$-$20$eV. As a result, the decaying cold dark matter explaining the COB excess is strongly disfavored by the anisotropy bound. We discuss some loopholes: e.g. warm/hot dark matter or two-step decay of the dark matter, to explain the COB excess.

18 pages, 4 figures; published version

References in corpus (35)

• Concentration, Spin and Shape of Dark Matter Haloes as a Function of the Cosmological Model: WMAP1, WMAP3 and WMAP5 results
• Revisiting the bound on axion-photon coupling from Globular Clusters
• Extended Limber Approximation
• Revisiting the SN1987A gamma-ray limit on ultralight axion-like particles
• A lower bound on the mass of Dark Matter particles
• Physics potential of the International Axion Observatory (IAXO)
• Consistency tests of $\Lambda$CDM from the early integrated Sachs-Wolfe effect: Implications for early-time new physics and the Hubble tension
• The Need for Purely Laboratory-Based Axion-Like Particle Searches
• Line-Intensity Mapping: 2017 Status Report
• Contraints on radiative dark-matter decay from the cosmic microwave background
• Compatibility of the chameleon-field model with fifth-force experiments, cosmology, and PVLAS and CAST results
• A Telescope Search for Decaying Relic Axions
• The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX): Description and Early Pilot Survey Results
• Implication of the Hubble tension for the primordial Universe in light of recent cosmological data
• Anomalous Flux in the Cosmic Optical Background Detected With New Horizons Observations
• New Horizons Observations of the Cosmic Optical Background
• Measurement of the EBL spectral energy distribution using the VHE gamma-ray spectra of H.E.S.S. blazars
• Axion constraints in non-standard thermal histories
• Searching for Light in the Darkness: Bounds on ALP Dark Matter with the optical MUSE-Faint survey
• Thermal axion production at low temperatures: a smooth treatment of the QCD phase transition
• Thermal QCD Axions across Thresholds
• Light Dark Matter from Inflaton Decay
• A GeV-TeV Measurement of the Extragalactic Background Light
• Breakdown of chiral perturbation theory for the axion hot dark matter bound
• Very Hairy Inflation
• Cosmological implications of $n_s\approx 1$ in light of the Hubble tension
• Future cosmological sensitivity for hot dark matter axions
• The cosmic optical background excess, dark matter, and line-intensity mapping
• Boosted Neutrinos and Relativistic Dark Particles as Messengers from Reheating
• Can decaying particle explain cosmic infrared background excess?
• Searching for axion-like particle decay in the near-infrared background: an updated analysis
• Thermal axions with multi-eV masses are possible in low-reheating scenarios
• The Spectrum of Dark Radiation as a Probe of Reheating
• Shining ALP Dark Radiation
• Hidden Photon and Axion Dark Matter from Symmetry Breaking

Cited by in corpus (18)

• Astrophysical Axion Bounds: The 2024 Edition
• Probing the Blue Axion with Cosmic Optical Background Anisotropies
• Seeking dark matter with $\gamma$-ray attenuation
• Direct-collapse supermassive black holes from relic particle decay
• Thermal production of cold "hot dark matter" around eV
• Novel bounds on decaying axionlike particle dark matter from the cosmic background
• Supermassive black hole seeds from sub-keV dark matter
• New Source for QCD Axion Dark Matter Production: Curvature Induced
• The Glow of Axion Quark Nugget Dark Matter: (I) Large Scale Structures
• Axion effects on gamma-ray spectral irregularities with AGN redshift uncertainty
• Upcoming searches for decaying dark matter with ULTRASAT ultraviolet maps
• Constraining eV-scale axion-like particle dark matter: insights from the M87 Galaxy
• Limits on scalar dark matter interactions with particles other than the photon via loop corrections to the scalar-photon coupling
• Bounds on ALP-Mediated Dark Matter Models from Celestial Objects
• Direct Collapse Black Hole Candidates from Decaying Dark Matter
• Blue Loops, Cepheids, and Forays into Axions
• Advancing Globular Cluster Constraints on the Axion-Photon Coupling
• Updated bounds on Axion-Like Particle Dark Matter with the optical MUSE-Faint survey