Abstract Details
| Name: Debojoti Kuzur Affiliation: Raghunathpur College Conference ID: ASI2025_527 Title : Topological Defects and Neutron Star Glitches Authors and Co-Authors : Debojoti Kuzur Abstract Type : Poster Abstract Category : High Energy Phenomena, Fundamental Physics and Astronomy Abstract : Rotational irregularities are one of the prominent observational features that most pulsars exhibit. These glitches, which are sudden increases in spin angular velocity, remain an open problem. In this study, we have investigated the potential role of nontrivial topological defects, specifically in the form of Nambu-goto-type cosmic strings, concerning spin irregularities. Such cosmic strings which are one-dimensional topological defects formed during various symmetry-breaking and phase transition scenarios, can interact with neutron stars, influencing their rotation. In this work, we see that the appearance of such topological defects trapped within the neutron star can lead to the coupling of the string tension with the angular velocity, leading to the abrupt rotational changes observed as pulsar glitches. The unique tension and topology of cosmic strings, combined with the extreme spacetime curvature around neutron stars, offer a plausible mechanism for these spin-up events. We have further studied how these coupling may generate detectable gravitational waves as a mixture of continuous and burst signals. The evolution of cusps of cosmic strings trapped within neutron stars and the neutron star's mass quadruple moment change due to rotation could produce distinctive gravitational wave signatures, well within the noise cutoff of advLIGO. Our study highlights a potential connection between topological defects, pulsar glitches, and gravitational wave emissions, offering a possible avenue for observationally testing the presence of cosmic strings and their astrophysical effects. |