{"paper":{"title":"Vaidya spacetimes, black-bounces, and traversable wormholes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Alex Simpson (Victoria University of Wellington), Matt Visser (Victoria University of Wellington), Prado Martin-Moruno (Universidad Complutense de Madrid)","submitted_at":"2019-02-12T04:07:03Z","abstract_excerpt":"We consider a non-static evolving version of the regular \"black-bounce\"/traversable wormhole geometry recently introduced in JCAP02(2019)042 [arXiv:1812.07114 [gr-qc]]. We first re-write the static metric using Eddington-Finkelstein coordinates, and then allow the mass parameter $m$ to depend on the null time coordinate (a la Vaidya). The spacetime metric is \\[ ds^{2}=-\\left(1-\\frac{2m(w)}{\\sqrt{r^{2}+a^{2}}}\\right)dw^{2}-(\\pm 2 \\,dw \\,dr) +\\left(r^{2}+a^{2}\\right)\\left(d\\theta^{2}+\\sin^{2}\\theta \\;d\\phi^{2}\\right). \\] Here $w=\\{u,v\\}$ denotes the $\\{outgoing,ingoing\\}$ null time coordinate; r"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.04232","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}