تقرير
Scalar Radiation with a Quartic Galileon
| العنوان: | Scalar Radiation with a Quartic Galileon |
|---|---|
| المؤلفون: | de Rham, Claudia, Giblin Jr, John T., Tolley, Andrew J. |
| سنة النشر: | 2024 |
| المجموعة: | Astrophysics High Energy Physics - Theory |
| مصطلحات موضوعية: | High Energy Physics - Theory, Astrophysics - Cosmology and Nongalactic Astrophysics |
| الوصف: | The class of Galileon scalar fields theories encapsulate the Vainshtein screening mechanism which is characteristic of a large range of infrared modified theories of gravity. Such theories can lead to testable departures from General Relativity through fifth forces and new scalar modes of gravitational radiation. However, the inherent non-linearity of the Vainshtein mechanism has limited analytic attempts to describe Galileon theories with both cubic and quartic interactions. To improve on this, we perform direct numerical simulations of the quartic Galileon model for a rotating binary source and infer the power spectrum of given multipoles. To tame numerical instabilities we utilize a low-pass filter, extending previous work on the cubic Galileon. Our findings show that the multipole expansion is well-defined and under control. Moreover, our results confirm that despite being a non-linear scalar, the dominant Galileon radiation is quadrupole, and we find a new scaling behaviour deep inside the Vainshtein region. Comment: 12 pages, 6 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2402.05898 |
| رقم الأكسشن: | edsarx.2402.05898 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |