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Constraints on Axion-Like Particles from Non-Observation of Spectral Modulations for X-ray Point Sources

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arxiv 1704.05256 v1 pith:GV4E6S5M submitted 2017-04-18 astro-ph.HE hep-ph

Joseph P. Conlon , Francesca Day , Nicholas Jennings , Sven Krippendorf , Markus Rummel This is my paper · ORCID
classification astro-ph.HEhep-ph
keywords gammasourceslesssimmodulationsspectralalp-photonconstraintsgalaxy
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

We extend previous searches for X-ray spectral modulations induced by ALP-photon conversion to a variety of new sources, all consisting of quasars or AGNs located in or behind galaxy clusters. We consider a total of seven new sources, with data drawn from the Chandra archive. In all cases the spectrum is well fit by an absorbed power-law with no evidence for spectral modulations, allowing constraints to be placed on the ALP-photon coupling parameter $g_{a\gamma\gamma}$. Two sources are particularly good: the Seyfert galaxy 2E3140 in A1795 and the AGN NGC3862 within the cluster A1367, leading to 95\% bounds for light ALPs ($m_a \lesssim 10^{-12} {\rm eV}$) of $g_{a\gamma\gamma} \lesssim 1.5 \times 10^{-12} {\rm GeV}^{-1}$ and $g_{a\gamma\gamma} \lesssim 2.4 \times 10^{-12} {\rm GeV}^{-1}$ respectively.

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Cited by 5 Pith papers

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

  1. Axion lines from nuclear de-excitations in galactic stellar populations

    hep-ph 2025-09 conditional novelty 6.0 of 10

    No 14.4 keV axion line from 57Fe de-excitations is seen by NuSTAR toward M87, M82, M31, or the Galactic Center, yielding |g_ann x g_aγγ| < 1.1e-22 GeV^-1 for m_a < 1e-10 eV.

  2. Active galactic nuclei through the prism of galaxy clusters: bounds on axion-like particles

    astro-ph.HE 2025-06 conditional novelty 6.0 of 10

    Stacked gamma-ray spectra of 29 AGN-cluster pairs place new bounds on axion-like particles with masses around 1 to 10 neV, improving previous limits by up to a factor of four under the assumed cluster magnetic fields.

  3. Time-delayed gamma-ray signatures of heavy axions from core-collapse supernovae

    hep-ph 2024-12 conditional novelty 6.0 of 10

    No gamma-ray excess from four supernovae in Fermi-LAT data yields the strongest constraints yet on MeV-to-GeV heavy axions coupled to both QED and QCD.

  4. On the impact of magnetic-field models in galaxy clusters on constraints on axion-like particles from the lack of irregularities in high-energy spectra of astrophysical sources

    astro-ph.HE 2019-08 conditional novelty 5.0 of 10

    For a purely regular magnetic field in the X-ray cavity of NGC 1275, the ALP-photon coupling constraints from Fermi-LAT spectral smoothness are much weaker than for the purely turbulent field assumed in previous work,...

  5. Lecture Notes: WISPs in gamma-ray astrophysics

    astro-ph.HE 2025-05 unverdicted novelty 1.0 of 10

    The paper is a pedagogical review of axion-like particle searches in gamma-ray astrophysics, with tutorial derivations and a notebook-based analysis of NGC 1275, and it contains no new research result.

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