English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Future observations of continuous gravitational waves from single neutronstars, apart from their monumental astrophysical significance, could also shedlight on fundamental physics and exotic particle states. One such avenue isbased on the fact that magnetic fields cause deformations of a neutron star,which results in a magnetic-field-induced quadrupole ellipticity. If themagnetic and rotation axes are different, this quadrupole ellipticity maygenerate continuous gravitational waves which may last decades, and may beobservable in current or future detectors. Light, milli-magnetic monopoles, ifthey exist, could be pair-produced non-perturbatively in the extreme magneticfields of neutron stars, such as magnetars. This non-perturbative productionfurnishes a new, direct dissipative mechanism for the neutron star magneticfields. Through their consequent effect on the magnetic-field-inducedquadrupole ellipticity, they may then potentially leave imprints in the earlystage continuous gravitational wave emissions. We speculate on this possibilityin the present study, by considering some of the relevant physics and taking avery simplified toy model of a magnetar as the prototypical system. Preliminaryindications are that new-born millisecond magnetars could be promisingcandidates to look for such imprints. Deviations from conventional evolution,and comparatively abrupt features in the early stage gravitational waveforms,distinct from other astrophysical contributions, could be distinguishablesignatures for these exotic monopole states.

Continuous Gravitational Waves and Magnetic Monopole Signatures from Single Neutron Stars