The gravitational field of photons
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- Bonnor, W.B. Gen Relativ Gravit (2009) 41: 77. doi:10.1007/s10714-008-0655-z
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The gravitational field of a photon on an infinite straight path is a single sheet of plane-fronted gravitational wave accompanying the photon and perpendicular to its track. This field cannot arise from a retarded potential generated by the photon, and I suggest that it arises in the process of emission. The near-field depends on the energy of the photon, but the far-field does not. The field of a steady beam of photons is compared with that of a static material rod, and the differences discussed.