Bondi-Sachs metrics and Photon Rockets
Huabin Ge, Mingxing Luo, Qiping Su, Ding Wang, Xiao Zhang
TL;DR
This paper explores Bondi-Sachs rocket models in (anti-) de Sitter spacetimes, revealing how acceleration arises from asymptotic symmetries and analyzing radiation and mass loss without gravitational waves.
Contribution
It extends the Bondi-Sachs framework to include nonzero cosmological constants and links acceleration to asymptotic symmetries in (anti-) de Sitter spacetimes.
Findings
Acceleration linked to asymptotic symmetries.
Pure radiation balances Bondi mass loss.
Certain models exhibit no gravitational radiation.
Abstract
We study the Bondi-Sachs rockets with nonzero cosmological constant. We observe that the acceleration of the systems arises naturally in the asymptotic symmetries of (anti-) de Sitter spacetimes. Assuming the validity of the concepts of energy and mass previously introduced in asymptotically flat spacetimes, we find that the emission of pure radiation energy balances the loss of the Bondi mass in certain special families of the Bondi-Sachs rockets, so in these there is no gravitational radiation.
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