Göttingen 2025 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

GR: Fachverband Gravitation und Relativitätstheorie

GR 9: Poster

GR 9.6: Poster

Mittwoch, 2. April 2025, 16:15–18:15, ZHG Foyer 1. OG

Impact of Topological Structures on Neutron Star Rotation and Their Observational Significance — •Debojoti Kuzur — Raghunathpur College, Purulia, West Bengal, India

Rotational irregularities are an important observational feature of most pulsars, often manifesting as glitches which are sudden increases in spin angular velocity. Despite extensive study, the underlying mechanism of these glitches remains unresolved. In this research, we explore the role of nontrivial topological defects, specifically Nambu-Goto type cosmic strings, in influencing pulsar spin irregularities. These one-dimensional defects, formed during symmetry-breaking phase transitions, can interact with neutron stars when trapped within their cores.

Our findings suggest that such cosmic strings can couple their tension with the star's angular velocity, resulting in abrupt rotational changes characteristic of pulsar glitches. Additionally, we examine how this coupling could generate detectable gravitational waves, comprising both continuous and burst-like components. The evolution of string cusps within neutron star cores and changes in the star's mass quadrupole moment due to rotation may produce distinctive gravitational wave signatures, potentially detectable by advanced LIGO (advLIGO) within its noise threshold.

This study establishes a possible link between cosmic strings, pulsar glitches, and gravitational wave emissions, offering a framework to test the existence and astrophysical effects of topological defects through observational data.

Keywords: Astrophysics; Neutron Stars; Topological Defects; Cosmics Strings; Dense Matter