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arXiv · 2408.02917

Near horizon limit of the Wang--Yau quasi-local mass

Po-Ning Chen
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Abstract

In this article, we compute the limit of the Wang--Yau quasi-local mass on a family of surfaces approaching the apparent horizon (the near horizon limit). Recently, Pook-Kolb, Zhao, Andersson, Krishnan, and Yau investigated the near horizon limit of the Wang--Yau quasi-local mass in binary black hole mergers in \cite{PK-Z-A-K-Y} and conjectured that the optimal embeddings approach the isometric embedding of the horizon into $\R^3$. Moreover, the quasi-local mass converges to the total mean curvature of the horizon in $\R^3$. The vanishing of the norm of the mean curvature vector implies special properties for the Wang--Yau quasi-local energy and the optimal embedding equation. We utilize these features to prove the existence and uniqueness of the optimal embedding and investigate the minimization of the Wang--Yau quasi-local energy. In particular, we prove the continuity of the quasi-local mass in the near horizon limit.

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Po-Ning Chen. 2024-08-06. Near horizon limit of the Wang--Yau quasi-local mass. https://arxiv.org/abs/2408.02917

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