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We investigate the use of next generation radio telescopes such as the Square Kilometre Array (SKA) to detect axion two-photon coupling in the astrophysical environment. The uncertainty surrounding astrophysical magnetic fields presents new…

Cosmology and Nongalactic Astrophysics · Physics 2017-10-31 Katharine Kelley , P. J. Quinn

Axion dark matter (DM) is predicted to convert into radio waves in neutron star magnetospheres. We assess the detectability of this signal using a 5 m radio telescope to be installed at the Fan Mountain Observatory, operating in the UHF, L-…

We study the conditions for the adiabatic resonant conversion of the cold dark matter (CDM) axions into photons in existence of the astrophysically sourced strong magnetic fields such as those in the neutron star magnetosphere. We…

High Energy Physics - Phenomenology · Physics 2018-06-13 Fa Peng Huang , Kenji Kadota , Toyokazu Sekiguchi , Hiroyuki Tashiro

Relativistic axions produced in decays of ${\mathcal O}(10^{-7}-10^{-2}$ $\text{eV})$ dark matter (DM) partially convert to photons after traversing the galactic magnetic field, giving rise to a signal observable by the Square Kilometer…

High Energy Physics - Phenomenology · Physics 2023-08-23 Arpan Kar , Tanmoy Kumar , Sourov Roy , Jure Zupan

Axion dark matter can satisfy the conditions needed to account for all of the dark matter and solve the strong CP problem. The Axion Dark Matter eXperiment (ADMX) is a direct dark matter search using a haloscope to convert axions to photons…

The exploration of the parameter space of axion and axion-like particle dark matter is a major aim of the future program of astroparticle physics investigations. In this context, we present a possible strategy that focuses on detecting…

High Energy Physics - Phenomenology · Physics 2024-06-06 Elisa Todarello , Marco Regis , Marco Taoso , Maurizio Giannotti , Jaime Ruz , Julia K. Vogel

The QCD axion is one of the most compelling candidates to explain the dark matter abundance of the universe. With its extremely small mass ($\ll 1\,\mathrm{eV}/c^2$), axion dark matter interacts as a classical field rather than a particle.…

Axion-like particles (ALPs) are light pseudo-scalar particles predicted in many theoretically well-motivated extensions to the standard model of particle physics (SM). The search for cold dark matter (CDM) ALPs has gained tremendous ground…

High Energy Physics - Phenomenology · Physics 2020-07-29 Ahmed Ayad , Geoff Beck

The particle nature of dark matter (DM) remains one of the most significant enigmas in modern cosmology. Axion-like particles (ALPs), as well-motivated candidates for cold dark matter, can undergo radiative decay into photon pairs, a…

Cosmology and Nongalactic Astrophysics · Physics 2026-05-08 Wen-Qing Guo

We study the extent to which the decay of cold dark matter axions can be probed with forthcoming radio telescopes such as the Square Kilometer Array (SKA). In particular we focus on signals arising from dwarf spheroidal galaxies, where…

Cosmology and Nongalactic Astrophysics · Physics 2019-03-15 Andrea Caputo , Carlos Peña Garay , Samuel J. Witte

Nearly all astrophysical and cosmological data point convincingly to a large component of cold dark matter (CDM) in the Universe. The axion particle, first theorized as a solution to the strong charge-parity problem of quantum…

Instrumentation and Detectors · Physics 2017-01-06 I. Stern

The axion is a light pseudoscalar particle which suppresses CP-violating effects in strong interactions and also happens to be an excellent dark matter candidate. Axions constituting the dark matter halo of our galaxy may be detected by…

Axions provide a natural and well-motivated dark matter candidate, with the capability to convert directly to photons in the presence of an electromagnetic field. A particularly compelling observational target is the conversion of dark…

The QCD axion, originally proposed to solve the strong CP problem in QCD, is a prominent candidate for dark matter (DM). In the presence of strong magnetic fields, such as those around neutron stars, axions can theoretically convert into…

Cosmology and Nongalactic Astrophysics · Physics 2025-02-19 Luca Visinelli , Bradley Johnson , Bradley J. Kavanagh , David J. E. Marsh , Jordan E. Shroyer , Liam Walters

Nearly all astrophysical and cosmological data point convincingly to a large component of cold dark matter in the Universe. The axion particle, first theorized as a solution to the strong charge-parity problem of quantum chromodynamics, has…

Instrumentation and Detectors · Physics 2017-01-09 I. Stern

In the past few years, the search for axion-like particles (ALPs) has grown significantly due to their potential to account for the total abundance of the cold dark matter (CDM) in the universe. The coupling between ALPs and photons allows…

High Energy Astrophysical Phenomena · Physics 2022-03-09 Ahmed Ayad , Geoff Beck

Axion as one of the promising dark matter candidates can be detected through narrow radio lines emitted from the magnetic white dwarf stars. Due to the existence of the strong magnetic field, the axion may resonantly convert into the radio…

High Energy Physics - Phenomenology · Physics 2021-06-23 Jin-Wei Wang , Xiao-Jun Bi , Run-Min Yao , Peng-Fei Yin

This Letter reports results from a haloscope search for dark matter axions with masses between 2.66 and 2.81 $\mu$eV. The search excludes the range of axion-photon couplings predicted by plausible models of the invisible axion. This…

The upcoming Deep Synoptic Array 2000 (DSA-2000) will map the radio sky at $0.7-2$ GHz ($2.9 - 8.3 \, \mu$eV) with unprecedented sensitivity. This will enable searches for dark matter and other physics beyond the Standard Model, of which we…

High Energy Physics - Phenomenology · Physics 2026-01-07 Kim V. Berghaus , Yufeng Du , Vincent S. H. Lee , Anirudh Prabhu , Robert Reischke , Liam Connor , Kathryn M. Zurek

Axions are a promising cold dark matter candidate. Haloscopes, which use the conversion of axions to photons in the presence of a magnetic field to detect axions, are the basis of microwave cavity searches such as the Axion Dark Matter…

Cosmology and Nongalactic Astrophysics · Physics 2020-07-01 N. Crisosto , G. Rybka , P. Sikivie , N. S. Sullivan , D. B. Tanner , J. Yang
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