Gamma Rays from ALP-Photon Conversion and Inverse Compton Reprocessing in Neutron Star Magnetospheres

arXiv:2608.00589 · astro-ph.HE, hep-ph · Submitted 2026-08-01 · Read on arXiv

Federica Giacchino, Conrado A. Torres, Giorgio Galanti, Bradley J. Kavanagh, Maria A. Pérez-García, Jose M. Diego

astro-ph.HE, hep-ph

Submitted: 2026-08-01

Comments: 25 pages, 24 figures, 1 table

Project page: https://cajohare.github.io/AxionLimits

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Core — 30× in this paper · explained in 2 episodes
• Inverse Compton — 17× in this paper
• Benchmark — 3× in this paper · explained in 2 episodes
• Coherence Length — 3× in this paper · explained in 2 episodes
• Calibration — 2× in this paper · explained in 7 episodes
• Degeneracy — 2× in this paper · explained in 3 episodes
• Abundance — 1× in this paper · explained in 1 episode
• Bulk Viscosity — 1× in this paper · explained in 2 episodes
• Equation of State (EoS) — 1× in this paper · explained in 4 episodes
• Inverse Compton (IC) scattering — 1× in this paper · explained in 2 episodes
• Robustness — 1× in this paper · explained in 5 episodes
• Trace — 1× in this paper · explained in 2 episodes
• Unified Framework — 1× in this paper · explained in 5 episodes

Sources

• String Axiverse
• The Low-Energy Frontier of Particle Physics
• Exploring the Role of Axions and Other WISPs in the Dark Universe
• WISPy Cold Dark Matter
• WISPedia -- the WISPs Encyclopedia
• A new upper limit on the axion-photon coupling with an extended CAST run with a Xe-based Micromegas detector
• Revisiting the SN1987A gamma-ray limit on ultralight axion-like particles
• Axion and neutrino bounds improved with new calibrations of the tip of the red-giant branch using geometric distance determinations
• Getting the most on supernova axions
• Improved axion emissivity from a supernova via nucleon-nucleon bremsstrahlung
• Conversion of Dark matter axions to photons in magnetospheres of neutron stars
• Detecting Axion Dark Matter with Radio Lines from Neutron Star Populations
• Radio Signals from Axion Dark Matter Conversion in Neutron Star Magnetospheres
• The radio telescope search for the resonant conversion of cold dark matter axions from the magnetized astrophysical sources
• Axion Constraints from Quiescent Soft Gamma-ray Emission from Magnetars
• Transient Radio Signatures from Neutron Star Encounters with QCD Axion Miniclusters
• Feebly-Interacting Particles:FIPs 2020 Workshop Report
• Magnetars and Axion-like Particles: Probes with the Hard X-ray Spectrum
• Radio Line Properties of Axion Dark Matter Conversion in Neutron Stars
• Axion Clouds around Neutron Stars

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