تقرير
Gravitational Radiation Power Spectrum of Garfinkle-Vachaspati Cosmic String Loops
| العنوان: | Gravitational Radiation Power Spectrum of Garfinkle-Vachaspati Cosmic String Loops |
|---|---|
| المؤلفون: | Storm, S. David, Scherrer, Robert J. |
| سنة النشر: | 2024 |
| المجموعة: | Astrophysics General Relativity and Quantum Cosmology |
| مصطلحات موضوعية: | General Relativity and Quantum Cosmology, Astrophysics - Cosmology and Nongalactic Astrophysics |
| الوصف: | We examine the power spectrum $P_n$ of the $n$th harmonic for Garfinkle-Vachaspati cosmic strings, which correspond to planar rectangular loops. While these loop tractories are self-intersecting, a slightly perturbed non-self-intersecting form of these trajectories has been suggested as a generic end state of cosmic string loop fragmentation. We find that $P_n$ scales as $n^{-2} \ln n$, rather than the expected $n^{-2}$ for kink-kink collisions. This result is demonstrated analytically for even $n$ in square loops and numerically for all other cases. At lowest order, the effect of loop decays is to further enhance $P_n$ at large $n$ relative to its value at small $n$. The consequences for relic stochastic background radiation along with the caveats pertaining to our results are discussed. Comment: 11 pages, 7 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2406.06743 |
| رقم الأكسشن: | edsarx.2406.06743 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |