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Measuring Ultralight-Axion Coherence with Galaxy Polarization Correlations

Doi, Yasuo
arXiv (All) · Papers
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cosmology-and-nongalactic-astrophysicshigh-energy-physics-phenomenology
Ultralight axion-like particles coupled to photons rotate the linear polarization of distant sources. We propose using the three-dimensional two-point correlation of galaxy polarization-rotation angles to measure not only the amplitude of this birefringence field but also its spatial coherence scale
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