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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

We show that axion dark matter (DM) may be detectable through narrow radio lines emitted from neutron stars. The neutron star magnetosphere hosts a strong magnetic field and a plasma frequency that increases towards the neutron star…

High Energy Physics - Phenomenology · Physics 2018-12-19 Anson Hook , Yonatan Kahn , Benjamin R. Safdi , Zhiquan Sun

Dark photon as an ultralight dark matter candidate can interact with the Standard Model particles via kinetic mixing. We propose to search for the ultralight dark photon dark matter using radio telescopes with solar observations. The dark…

High Energy Physics - Phenomenology · Physics 2021-05-07 Haipeng An , Fa Peng Huang , Jia Liu , Wei Xue

Axion dark matter (DM) may convert to radio-frequency electromagnetic radiation in the strong magnetic fields around neutron stars. The radio signature of such a process would be an ultra-narrow spectral peak at a frequency determined by…

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

The search for axions has gained ground in recent years, with laboratory searches for cold dark matter (CDM) axions, relativistic solar axions and ultra-light axions the subject of extensive literature. In particular, the interest in axions…

Cosmology and Nongalactic Astrophysics · Physics 2017-08-07 Katharine Kelley , P. J. Quinn

It has been suggested that radio telescopes may be sensitive to axion dark matter that resonantly converts to radio photons in the magnetospheres surrounding neutron stars (NSs). In this work, we closely examine this possibility by…

Cosmology and Nongalactic Astrophysics · Physics 2019-07-03 Benjamin R. Safdi , Zhiquan Sun , Alexander Y. Chen

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

We consider resonant wave-like dark matter conversion into low-frequency radio waves in the Earth's ionosphere. Resonant conversion occurs when the dark matter mass and the plasma frequency coincide, defining a range $m_{ \text{DM} } \sim…

High Energy Physics - Phenomenology · Physics 2024-05-24 Carl Beadle , Andrea Caputo , Sebastian A. R. Ellis

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…

We show that Earth's natural environment can serve as a powerful probe for ultralight axion dark matter. In the presence of global geomagnetic fields, the axions with masses ranging from $10^{-15}\,{\rm eV}-10^{-13}\,{\rm eV}$ induce…

High Energy Physics - Phenomenology · Physics 2025-09-19 Atsushi Taruya , Atsushi Nishizawa , Yoshiaki Himemoto

Dark photons can be the ultralight dark matter candidate, interacting with Standard Model particles via kinetic mixing. We propose to search for ultralight dark photon dark matter (DPDM) through the local absorption at different radio…

High Energy Physics - Phenomenology · Physics 2023-05-12 Haipeng An , Shuailiang Ge , Wen-Qing Guo , Xiaoyuan Huang , Jia Liu , Zhiyao Lu

The potential to detect axion dark matter through astrophysical processes has shown high promise in recent years. We therefore expand on previous work studying the axion-to-photon conversion efficacy of neutron stars and the interstellar…

High Energy Astrophysical Phenomena · Physics 2026-05-15 Felix Weber , Vikram Ravi

We present a novel search for dark photon dark matter (DM) using terrestrial magnetic field measurements at frequencies below 100 Hz. Coherently oscillating dark photon DM can induce a monochromatic magnetic field via kinetic mixing with…

High Energy Physics - Phenomenology · Physics 2026-05-12 Kimihiro Nomura , Atsushi Nishizawa , Atsushi Taruya , Yoshiaki Himemoto

We propose a new method to detect observational appearance of Dark Matter axions. The method utilizes observations of neutron stars (NSs) in radio. It is based on the conversion of axions to photons in strong magnetic fields of NSs…

Astrophysics · Physics 2014-11-18 M. S. Pshirkov , S. B. Popov

Ultralight axion or axionlike particles are one of the most promising candidates for dark matter because they are a well-motivated solution for the theoretical strong $CP$ problem and observational issues on small scales, i.e. the core-cusp…

Cosmology and Nongalactic Astrophysics · Physics 2025-01-09 Ran Gao , Zhengxiang Li , Kai Liao , He Gao , Bing Zhang , Zong-Hong Zhu

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-…

Dark photon dark matter that has a kinetic mixing with the Standard Model photon can resonantly convert in environments where its mass $m_{A'}$ coincides with the plasma frequency. We show that such conversion in neutron stars or accreting…

High Energy Physics - Phenomenology · Physics 2023-09-14 Edward Hardy , Ningqiang Song

The natural environment of the Earth can act as a sensitive detector for dark matter in ultralight axions. When axions with masses between $1\times10^{-15}\,{\rm eV}$ and $1\times10^{-13}\,{\rm eV}$ pass through the Earth, they interact…

High Energy Physics - Phenomenology · Physics 2025-04-23 Atsushi Nishizawa , Atsushi Taruya , Yoshiaki Himemoto

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
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