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Wormholes without exotic matter: quasinormal modes, echoes and shadows

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arxiv 2107.05977 v3 pith:JWBTGY62 submitted 2021-07-13 gr-qc astro-ph.HEhep-th

Wormholes without exotic matter: quasinormal modes, echoes and shadows

M. S. Churilova , R. A. Konoplya , Z. Stuchlik , A. Zhidenko This is my paper
classification gr-qc astro-ph.HEhep-th
keywords wormholesechoeseinstein-maxwell-diracexoticmatterobtainedquasinormalshadows
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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An analytical solution representing traversable asymptotically flat and symmetric wormholes was obtained without adding exotic matter in two different theories independently: in the Einstein-Maxwell-Dirac theory and in the second Randall-Sundrum brane-world model. Further, a smooth normalizable asymmetric wormhole solution has been recently obtained numerically in the Einstein-Maxwell-Dirac theory. Using the time-domain integration method we study quasinormal ringing of all these wormholes with emphasis to the regime of mimicking the near extremal Reissner-Nordstr\"om black holes, which is characterised by echoes. In addition, we calculate radius of shadows cast by these wormholes.

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