Constraining meV Axion Dark Matter with ALMA Observations of the Galactic Center Magnetar SGR 1745-2900

arXiv:2512.06441 · hep-ph, astro-ph.CO, astro-ph.HE, astro-ph.SR, hep-ex · Submitted 2025-12-06 · Read on arXiv

hep-ph, astro-ph.CO, astro-ph.HE, astro-ph.SR, hep-ex

Submitted: 2025-12-06

Updated: 2026-05-25

Comments: As accepted by PLB

DOI: 10.1016/j.physletb.2026.140567

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

Terminology

• Benchmark — 12× in this paper · explained in 2 episodes
• Galactic Center — 6× in this paper
• Calibration — 3× in this paper · explained in 7 episodes
• Core — 1× in this paper · explained in 2 episodes
• Equation of State (EoS) — 1× in this paper · explained in 4 episodes
• Signal-to-noise ratio (SNR) — 1× in this paper · explained in 2 episodes

Sources

• Radio Line Properties of Axion Dark Matter Conversion in Neutron Stars
• A Search for Axionic Dark Matter Using the Magnetar PSR J1745-2900
• New Limits on Axionic Dark Matter from the Magnetar PSR J1745-2900
• Superdense beaming of axion dark matter in the vicinity of the light cylinder of pulsars
• The Structure of Cold Dark Matter Halos
• Radio Signal of Axion-Photon Conversion in Neutron Stars: A Ray Tracing Analysis
• Dynamical constraints on a dark matter spike at the Galactic Centre from stellar orbits
• NuSTAR discovery of a 3.76-second transient magnetar near Sagittarius A*
• A Novel Calibration and Imaging Method for ALMA Observations of SgrA*
• Electrodynamics of Magnetars: Implications for the Persistent X-ray Emission and Spindown of the Soft Gamma Repeaters and Anomalous X-ray Pulsars
• Constraints on the dense matter equation of state from young and cold isolated neutron stars
• 511 keV Galactic Photons from a Dark Matter Spike
• A dark matter telescope probing the 6 to 60 GHz band
• New CAST Limit on the Axion-Photon Interaction
• Revisiting the bound on axion-photon coupling from Globular Clusters
• Advancing Globular Cluster Constraints on the Axion-Photon Coupling
• Redefining the Axion Window
• Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar
• Searching for Axion Dark Matter Near Relaxing Magnetars

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