Kilohertz gravitational waves from a neutron star merger convert to electromagnetic waves near a magnetar via the Gertsenshtein-Zeldovich effect and are inverse Compton scattered to gigahertz frequencies to explain the associated fast radio burst.
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Proposes that axion-photon conversion in pre-CMB helical magnetic fields imprints detectable V-mode polarization in the CMB, allowing CLASS 40 GHz observations to constrain ALP masses 10^{-10} to 10^{-8} eV and their photon coupling under optimistic nG field assumptions.
Derives first-order EM perturbation equations from covariant Maxwell equations in GW backgrounds, shows equivalence of formulations, and calculates that typical GW strains of 10^{-21} induce EM responses of order 10^{-19} relative to incident fields.
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Gravitational Gertsenshtein-Zeldovich mechanism for the Association between GW190425 and FRB 20190425A
Kilohertz gravitational waves from a neutron star merger convert to electromagnetic waves near a magnetar via the Gertsenshtein-Zeldovich effect and are inverse Compton scattered to gigahertz frequencies to explain the associated fast radio burst.