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Interpreting A and B-metrics with Λ as gravitational field of a tachyon in (anti-)de Sitter universe
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Interpreting A and B-metrics with Λ as gravitational field of a tachyon in (anti-)de Sitter universe
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We investigate main properties and mutual relations of the so-called A and B-metrics with any value of the cosmological constant. In particular, we explicitly show that both the AII and BI-metrics are, in fact, the famous Schwarzschild-(anti-)de Sitter spacetime (that is the AI-metric) boosted to superluminal speed. Together they form the complete gravitational field of a tachyon in Minkowski or (anti-)de Sitter universe. The boundary separating the AII and BI regions is the Mach-Cherenkov shockwave on which the curvature is unbounded. We analyze various geometric features of such spacetimes, we provide their natural physical interpretation, and we visualize them using convenient background coordinates and embeddings.
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