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- W4385963635 abstract "Gravitational waves from isolated sources have eluded detection so far. The upper limit of long-lasting continuous gravitational wave emission is now at the stage of probing physically-motivated models with the most optimistic being strongly constrained. One potential avenue to remedy this is to relax the assumption of the gravitational wave being quasi-infinite in duration, leading to the idea of transient continuous gravitational waves. In this paper, we outline how to get transient continuous waves from magnetars (or strongly-magnetised neutron stars) that exhibit glitches and/or antiglitches. We put forward a toy model whereby at a glitch or antiglitch, mass is ejected from the magnetar but becomes trapped on its outward journey through the magnetosphere. Depending on the specific values of the height of the trapped ejecta and the magnetic inclination angle, we are able to reproduce both glitches and antiglitches from simple angular momentum arguments. The trapped ejecta sets the magnetar into precession causing gravitational waves to be emitted at once and twice the magnetar's spin frequency, for a duration equal to however long the ejecta is trapped for. We find that the gravitational waves are more likely to be detectable when the magnetar is: closer, rotating faster, or has larger glitches/antiglitches. Specific to this model, we find that the detectability improves when the ejecta height and magnetic inclination angle have values near the boundary in the parameter space that separates glitches and antiglitches, though this requires more mass to be ejected to remain consistent with the observed glitch/antiglitch." @default.
- W4385963635 created "2023-08-18" @default.
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- W4385963635 date "2023-08-03" @default.
- W4385963635 modified "2023-09-27" @default.
- W4385963635 title "Continuous gravitational waves from trapped magnetar ejecta and the connection to glitches and antiglitches" @default.
- W4385963635 doi "https://doi.org/10.48550/arxiv.2308.01588" @default.
- W4385963635 hasPublicationYear "2023" @default.
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