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NuSTAR as an Axion Helioscope
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We present a novel approach to investigating axions and axionlike particles by studying their potential conversion into x-rays within the Sun’s atmospheric magnetic field. Utilizing high-sensitivity data from the nuclear spectroscopic telescope array (NuSTAR) collected during the 2020 solar minimum, along with advanced solar atmospheric magnetic field models, we establish a new limit on the axion-photon coupling strength gaγ≲7.3×10−12 GeV−1 at 95% CL for axion masses ma≲4×10−7 eV. This constraint surpasses current ground-based experimental limits, studying previously unexplored regions of the axion-photon coupling parameter space up to masses of ma≲3.4×10−4 eV. These findings mark a significant advancement in our ability to probe axion properties and strengthen indirect searches for dark matter candidates.
American Physical Society (APS)
Title: NuSTAR as an Axion Helioscope
Description:
We present a novel approach to investigating axions and axionlike particles by studying their potential conversion into x-rays within the Sun’s atmospheric magnetic field.
Utilizing high-sensitivity data from the nuclear spectroscopic telescope array (NuSTAR) collected during the 2020 solar minimum, along with advanced solar atmospheric magnetic field models, we establish a new limit on the axion-photon coupling strength gaγ≲7.
3×10−12 GeV−1 at 95% CL for axion masses ma≲4×10−7 eV.
This constraint surpasses current ground-based experimental limits, studying previously unexplored regions of the axion-photon coupling parameter space up to masses of ma≲3.
4×10−4 eV.
These findings mark a significant advancement in our ability to probe axion properties and strengthen indirect searches for dark matter candidates.
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