Abstract
We show that the soft part of the charge generating infinitesimal superrotations can be expressed, in harmonic gauge, in terms of metric components evaluated at the boundaries of null infinity that are subleading in a large radius expansion. We then recast the spin memory observable in terms of these boundary values.
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ArXiv ePrint: 1902.01840
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Himwich, E., Mirzaiyan, Z. & Pasterski, S. A note on the subleading soft graviton. J. High Energ. Phys. 2021, 172 (2021). https://doi.org/10.1007/JHEP04(2021)172
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DOI: https://doi.org/10.1007/JHEP04(2021)172