Wormholes without exotic matter: quasinormal modes, echoes and shadows. Issue 10 (6th October 2021)

• Record Type: Journal Article
• Authors: Churilova, M.S.; Konoplya, R.A.; Stuchlík, Z.; Zhidenko, A.
• Is Part Of: Journal of cosmology and astroparticle physics. Volume 2021:Issue 10(2021)
• Publication Date: 2021-10-06
• Subjects: Wormholes -- gravitational waves / theory -- gravity; Cosmology -- Periodicals; Astrophysics -- Periodicals; 523.0105
• DOI: 10.1088/1475-7516/2021/10/010
• Languages: English
• ISSNs: 1475-7516

Abstract

Abstract: 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-Nordström black holes, which is characterised by echoes. In addition, we calculate radius of shadows cast by these wormholes.