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arXiv · 2604.12135

Blueshift of light rays induced by gravitational wave memory effect

F. L. Carneiro·S. C. Ulhoa·J. W. Maluf
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Abstract

The article deals with photon propagation in pp-wave spacetimes in the strong gravitational-wave regime and its consequences for redshift measurements. We show that null geodesics crossing a localized pp-wave pulse exhibit an energy memory effect, producing a finite asymptotic shift in the photon frequency measured by static observers. This path-dependent contribution acts directly on the redshift observable and may help account for divergent interpretations of supernova redshift data in the presence of intervening gravitational radiation.

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F. L. Carneiro, S. C. Ulhoa, J. W. Maluf. 2026-04-13. Blueshift of light rays induced by gravitational wave memory effect. https://doi.org/10.1088/1361-6382%2Fae59e7

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