تقرير
Simulations of multi-field ultralight axion-like dark matter
| العنوان: | Simulations of multi-field ultralight axion-like dark matter |
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| المؤلفون: | Glennon, Noah, Musoke, Nathan, Prescod-Weinstein, Chanda |
| المصدر: | Phys. Rev. D 107, 063520, 2023 |
| سنة النشر: | 2023 |
| المجموعة: | Astrophysics High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Phenomenology |
| الوصف: | As constraints on ultralight axion-like particles (ALPs) tighten, models with multiple species of ultralight ALP are of increasing interest. We perform simulations of two-ALP models with particles in the currently supported range [arXiv:1307.1705] of plausible masses. The code we modified, UltraDark.jl, not only allows for multiple species of ultralight ALP with different masses, but also different self-interactions and inter-field interactions. This allows us to perform the first three-dimensional simulations of two-field ALPs with self-interactions and inter-field interactions. Our simulations show that having multiple species and interactions introduces different phenomenological effects as compared to a single field, non-interacting scenarios. In particular, we explore the dynamics of solitons. Interacting multi-species ultralight dark matter has different equilibrium density profiles as compared to single-species and/or non-interacting ultralight ALPs. As seen in earlier work [arXiv:2011.09510], attractive interactions tend to contract the density profile while repulsive interactions spread out the density profile. We also explore collisions between solitons comprised of distinct axion species. We observe a lack of interference patterns in such collisions, and that resulting densities depend on the relative masses of the ALPs and their interactions. Comment: 16 pages, 11 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevD.107.063520 |
| URL الوصول: | http://arxiv.org/abs/2302.04302 |
| رقم الأكسشن: | edsarx.2302.04302 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevD.107.063520 |
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