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arxiv 2108.02061 v1 pith:HA7CLSJO submitted 2021-08-04 astro-ph.HE hep-ph

gammaALPs: An open-source python package for computing photon-axion-like-particle oscillations in astrophysical environments

classification astro-ph.HE hep-ph
keywords gammaalpsopen-sourcealpsastrophysicalaxionseasilyenergiesenvironments
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Axions and axion-like particles (ALPs) are hypothetical particles that occur in extensions of the Standard Model and are candidates for cold dark matter. They could be detected through their oscillations into photons in the presence of external electromagnetic fields. gammaALPs is an open-source python framework that computes the oscillation probability between photons and axions/ALPs. In addition to solving the photon-ALP equations of motion, gammaALPs includes models for magnetic fields in different astrophysical environments such as jets of active galactic nuclei, intra-cluster and intergalactic media, and the Milky Way. Users are also able to easily incorporate their own custom magnetic-field models. We review the basic functionality and features of gammaALPs, which is heavily based on other open-source scientific packages such as numpy and scipy. Although focused on gamma-ray energies, gammaALPs can be easily extended to arbitrary photon energies.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Lights, Camera, Axion: Tracing Axions from Supernovae in the Diffuse $\gamma$-ray Sky

    hep-ph 2026-04 unverdicted novelty 7.0

    Axions produced in supernovae generate a diffuse gamma-ray signal through conversion in magnetic fields, yielding competitive constraints on the axion-photon coupling from COMPTEL, EGRET, and Fermi-LAT data plus forec...

  2. Weakly supervised machine learning for model-agnostic searches of new phenomena in the $\gamma$-ray sky

    astro-ph.HE 2026-07 conditional novelty 5.0

    Weakly supervised classifiers trained on background-versus-mixture samples can identify anomalous gamma-ray sources without labeled signal templates, approaching supervised performance in controlled benchmarks.

  3. Line-of-sight magnetic-field propagation effects on axion-like particle constraints from GRB 221009A

    hep-ph 2026-06 unverdicted novelty 5.0

    Intergalactic magnetic field strength, coherence scale, and stochastic properties significantly alter ALP exclusion contours from GRB 221009A, while host-galaxy and Milky Way fields cause only mild changes.

  4. Circular polarization effects induced by photon-axion mixing in astrophysical environments

    astro-ph.HE 2026-06 unverdicted novelty 4.0

    Photon-axion mixing in magnetic fields induces circular polarization that constrains the axion-photon coupling to g_aγγ ≤ 5×10^{-12} GeV^{-1} for m_a ~10^{-16}--10^{-10} eV using blazar data, with peak sensitivity in ...