Seeking dark matter with $\gamma$-ray attenuation

Abstract

The flux of high-energy astrophysical $\gamma$ rays is attenuated by the production of electron-positron pairs from scattering off of extragalactic background light (EBL). We use the most up-to-date information on galaxy populations to compute their contributions to the pair-production optical depth. We find that the optical depth inferred from $\gamma$-ray measurements exceeds that expected from galaxies at the $\sim 2\sigma$ level. If the excess is modeled as a frequency-independent re-scaling of the standard contribution to the EBL from galaxies, then an excess (an overall $14-30\%$ increase of the EBL) over the null hypothesis of no excess at the $2.7\sigma$ level. If the frequency dependence of the excess is instead modeled as a two-photon decay of a dark-matter axion, then the excess is favored over the null hypothesis at the $2.1\sigma$ confidence level. While we find no evidence for a dark-matter signal, the analysis sets the strongest current bounds on the photon-axion coupling over the $8-25$ eV mass range. This work highlights the sensitivity of $\gamma$-ray optical depth measurements to ALPs, which is expected to improve with new observatories and better EBL determinations from future observations.

arXiv comment5 pages + 3 pages of appendix (+5 pages of references), 6 figures. Discussions and figures slightly modified, an appendix to discuss the likelihood added, conclusions unchanged. Matches the published version

References in corpus (96)

• Particle Dark Matter: Evidence, Candidates and Constraints
• CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey
• CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey - The Hubble Space Telescope Observations, Imaging Data Products and Mosaics
• Axion Cosmology
• Toward a halo mass function for precision cosmology: the limits of universality
• UV Luminosity Functions at redshifts z~4 to z~10: 10000 Galaxies from HST Legacy Fields
• New CAST Limit on the Axion-Photon Interaction
• WISPy Cold Dark Matter
• Spectral Energy Distributions of Hard X-ray selected AGNs in the XMDS Survey
• Extragalactic Background Light Inferred from AEGIS Galaxy SED-type Fractions
• X-ray emission from star-forming galaxies - I. High-mass X-ray binaries
• The transition from Population III to normal galaxies: Ly-a and HeII 1640 emission and the ionising properties of high redshift starburst galaxies
• Modeling the Extragalactic Background Light from Stars and Dust
• Semi-analytic modeling of the EBL and consequences for extragalactic gamma-ray spectra
• Revisiting the bound on axion-photon coupling from Globular Clusters
• Primordial Nucleosynthesis: from precision cosmology to fundamental physics
• The evolution of CMB spectral distortions in the early Universe
• K-band Properties of Galaxy Clusters and Groups: Luminosity Function, Radial Distribution and Halo Occupation Number
• Spectral synthesis including massive binaries
• Cosmological bounds on pseudo Nambu-Goldstone bosons
• The Imprint of The Extragalactic Background Light in the Gamma-Ray Spectra of Blazars
• Evidence for a new light spin-zero boson from cosmological gamma-ray propagation?
• General Constraints on Dark Matter Decay from the Cosmic Microwave Background
• Search for Spectral Irregularities due to Photon-Axionlike-Particle Oscillations With the Fermi Large Area Telescope
• Indirect Dark Matter Signatures in the Cosmic Dark Ages II. Ionization, Heating and Photon Production from Arbitrary Energy Injections
• The Hierarchical Build-Up of Massive Galaxies and the Intracluster Light since z=1
• Big Bang Nucleosynthesis as a Probe of New Physics
• The extragalactic background light, the Hubble constant, and anomalies: conclusions from 20 years of TeV gamma-ray observations
• A fresh look at linear cosmological constraints on a decaying dark matter component
• Checking the dark matter origin of 3.53 keV line with the Milky Way center
• A new interpretation of the gamma-ray observations of active galactic nuclei
• A $\gamma$-ray determination of the Universe's star-formation history
• Constraints on axionlike particles with H.E.S.S. from the irregularity of the PKS 2155-304 energy spectrum
• Detecting Axion-Like Particles With Gamma Ray Telescopes
• Gamma-ray Constraints on Decaying Dark Matter and Implications for IceCube
• Diffuse Optical Light in Galaxy Clusters II: Correlations with Cluster Properties
• Role of line-of-sight cosmic ray interactions in forming the spectra of distant blazars in TeV gamma rays and high-energy neutrinos
• Secondary photons and neutrinos from cosmic rays produced by distant blazars
• The Global 21-cm Signal in the Context of the High-z Galaxy Luminosity Function
• The photo-philic QCD axion
• An observational determination of the evolving extragalactic background light from the multiwavelength HST/CANDELS survey in the Fermi and CTA era
• Extra-galactic background light measurements from the far-UV to the far-IR from deep ground and space-based galaxy counts
• Signatures of axion-like particles in the spectra of TeV gamma-ray sources
• On the Origin of Near-Infrared Extragalactic Background Light Anisotropy
• A deep search for decaying dark matter with XMM-Newton blank-sky observations
• A Telescope Search for Decaying Relic Axions
• New Spectral Evidence of an Unaccounted Component of the Near-infrared Extragalactic Background Light from the CIBER
• Cosmic Optical Background: the View from Pioneer 10/11
• Measurement of the Extragalactic Background Light using MAGIC and Fermi-LAT gamma-ray observations of blazars up to z = 1
• Decoding the X-ray Properties of Pre-Reionization Era Sources
• The dark matter interpretation of the 3.5-keV line is inconsistent with blank-sky observations
• Effects of Axion-Photon Mixing on Gamma-Ray Spectra from Magnetized Astrophysical Sources
• Detecting the Stimulated Decay of Axions at Radio Frequencies
• A new measurement of the Hubble constant and matter content of the Universe using extragalactic background light $\gamma$-ray attenuation
• The synergy between CMB spectral distortions and anisotropies
• Constraints on Decaying Dark Matter from the Isotropic Gamma-Ray Background
• Anomalous Flux in the Cosmic Optical Background Detected With New Horizons Observations
• An Empirical Determination of the Intergalactic Background Light from UV to FIR Wavelengths Using FIR Deep Galaxy Surveys and the Gamma-ray Opacity of the Universe
• New Horizons Observations of the Cosmic Optical Background
• Spectral distortion constraints on photon injection from low-mass decaying particles
• Looking for Axion Dark Matter in Dwarf Spheroidals
• Non-universal BBN bounds on electromagnetically decaying particles
• Limits on axion-like particles from Mrk 421 with 4.5-year period observations by ARGO-YBJ and Fermi-LAT
• Strong constraints on decay and annihilation of dark matter from heating of gas-rich dwarf galaxies
• Searching for Light in the Darkness: Bounds on ALP Dark Matter with the optical MUSE-Faint survey
• Measurement of the Cosmic Optical Background using the Long Range Reconnaissance Imager on New Horizons
• Unique Signatures of Population III Stars in the Global 21-cm Signal
• Ultraviolet Luminosity Density of the Universe During the Epoch of Reionization
• A GeV-TeV Measurement of the Extragalactic Background Light
• Cosmic infrared background excess from axion-like particles and implications for multi-messenger observations of blazars
• Extragalactic background Light: a measurement at 400 nm using dark cloud shadow II. Spectroscopic separation of dark cloud's light, and results
• Reconstructing the γ-ray Photon Optical Depth of the Universe to z~4 from Multiwavelength Galaxy Survey Data
• Questioning a 3.5 keV dark matter emission line
• Dark Matter Targets for Axion-like Particle Searches
• Constraints on the Extragalactic Background Light from Very High Energy Gamma-Ray Observations of Blazars
• Strategies to Detect Dark-Matter Decays with Line-Intensity Mapping
• Axion decay and anisotropy of near-IR extragalactic background light
• The cosmic optical background excess, dark matter, and line-intensity mapping
• Searching for Decaying and Annihilating Dark Matter with Line Intensity Mapping
• Anisotropic cosmic optical background bound for decaying dark matter in light of the LORRI anomaly
• Gamma-ray Cosmology and Tests of Fundamental Physics
• Detecting the radiative decay of the cosmic neutrino background with line-intensity mapping
• First implications of Tibet AS${}_{\gamma }$ data for heavy dark matter
• SKYSURF: Constraints on Zodiacal Light and Extragalactic Background Light through Panchromatic HST All-Sky Surface-Brightness Measurements: I. Survey Overview and Methods
• Searching for Sterile Neutrino with X-ray Intensity Mapping
• Zodiacal Light Beyond Earth Orbit Observed with Pioneer 10
• Constraining the near-IR background light from Population-III stars using high redshift gamma-ray sources
• Fluctuation of the background sky in the Hubble Extremely Deep Field (XDF) and its origin
• Searching for axion-like particle decay in the near-infrared background: an updated analysis
• Search for decaying eV-mass axion-like particles using gamma-ray signal from blazars
• Search for spectral features in extragalactic background light with gamma-ray telescopes
• Probing photon-ALP oscillations from the flat spectrum radio quasar 4C+21.35
• Searching for eV-mass Axion-like Particles with Cross Correlations between Line Intensity and Weak Lensing Maps
• Relevance of VHE Blazar Spectra Models with Axion-Like Particles
• A sensitive search for unknown spectral emission lines in the diffuse X-ray background with XMM-Newton
• Advancing Globular Cluster Constraints on the Axion-Photon Coupling

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• Upcoming searches for decaying dark matter with ULTRASAT ultraviolet maps
• Constraining eV-scale axion-like particle dark matter: insights from the M87 Galaxy
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