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Seminar
Speaker
Poulami Dutta Roy (Indian Institute of Technology Kharagpur)
Date & Time
Tue, 27 September 2022, 15:00 to 16:30
Venue
Online and Emmy Noether Seminar Room
Resources
Abstract

Our work intends to establish wormholes as real astrophysical objects by exploring various wormhole models, their black hole `mimicking' features, and their gravitational wave signatures.
We focus mainly on two classes of spacetimes: (a) a two-parameter Lorentzian wormhole family, (b) a generalized version of the Hayward metric with two different mass parameters in $g_{tt}$ and $g_{rr}$, which interpolates between wormholes, regular and singular black holes depending on parameter choice. The stability analysis focuses on the behavior of quasi-normal modes for both the spacetime classes under scalar wave propagation. Interestingly, the Lorentzian wormhole family is found to harbor a novel triple barrier potential under axial gravitational perturbation. We also explore the mimicking properties of the ringdown profiles for the classes of spacetime mentioned above and observe the gravitational wave echoes. We hope our study will take us a step closer in developing proper templates for detecting the wormholes through future gravitational wave observations.