Abstract
A spacetime endowed with a globally defined timelike Killing vector field admits a certain model of warped product, called the standard static spacetime, and, when the volume element is modified by a factor that depends on a smooth function (which is called density function), we say that this ambient is a weighted standard static spacetime. In such spacetimes, we study some aspects of the geometry of spacelike hypersurfaces through of drift Laplacian of two functions support naturally related to them. For such hypersurfaces, with some restrictions on density function and the geometry of the ambient spacetime, we begin by stating and showing some results of uniqueness and nonexistence, several of them not assuming that the hypersurface to be of constant weighted mean curvature. Versions of these results are given for entire Killing graphs, that is, graphs constructed over an integral leaf of the distribution of smooth vector fields orthogonal to timelike Killing vector field. Finally, for closed spacelike hypersurface immersed in a weighted standard static spacetime with constant weighted mean curvature, we study a notion of stability via the first eigenvalue of the drift Laplacian.
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Acknowledgements
The authors would like to thank the Associate Editor Mirjana Djoric for her comments and suggestions which enabled them to improve this paper. The second and fourth authors are partially supported by CNPq, Brazil, Grants 301970/2019-0 and 311224/2018-0, respectively.
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de Lima, E.L., de Lima, H.F., Ramalho, A.F.A. et al. Spacelike Hypersurfaces Immersed in Weighted Standard Static Spacetimes: Uniqueness, Nonexistence and Stability. Results Math 75, 76 (2020). https://doi.org/10.1007/s00025-020-01200-9
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DOI: https://doi.org/10.1007/s00025-020-01200-9
Keywords
- Weighted standard static spacetimes
- Bakry–Émery–Ricci tensor
- spacelike hypersurfaces
- f-mean curvature
- f-parabolicity
- f-stability