Electronic Resource
Heavy dark matter in white dwarfs: multiple-scattering capture and thermalization
| العنوان: | Heavy dark matter in white dwarfs: multiple-scattering capture and thermalization |
|---|---|
| المؤلفون: | Bell, NF, Busoni, G, Robles, S, Virgato, M |
| بيانات النشر: | IOP Publishing 2024-07-01 |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | We present an improved treatment for the scattering of heavy dark matter from the ion constituents of a white dwarf. In the heavy dark matter regime, multiple collisions are required for the dark matter to become gravitationally captured. Our treatment incorporates all relevant physical effects including the dark matter trajectories, nuclear form factors, and radial profiles for the white dwarf escape velocity and target number densities. Our capture rates differ by orders of magnitude from previous estimates, which have typically used approximations developed for dark matter scattering in the Earth. We also compute the time for the dark matter to thermalize in the center of the white dwarf, including in-medium effects such as phonon emission and absorption from the ionic lattice in the case where the star has a crystallized core. We find much shorter thermalization timescales than previously estimated, especially if the white dwarf core has crystallized. We illustrate the importance of our improved approach by determining the cross section required for accumulated asymmetric dark matter to self-gravitate. |
| مصطلحات الفهرس: | Journal Article |
| URL: | |
| الاتاحة: | Open access content. Open access content cc-by https://creativecommons.org/licenses/cc-by/4.0 |
| Other Numbers: | UMV oai:jupiter.its.unimelb.edu.au:11343/349778 Bell, N. F., Busoni, G., Robles, S. & Virgato, M. (2024). Heavy dark matter in white dwarfs: multiple-scattering capture and thermalization. Journal of Cosmology and Astroparticle Physics, 2024 (7), pp.051-051. https://doi.org/10.1088/1475-7516/2024/07/051. 10.1088/1475-7516/2024/07/051 1475-7516 1475-7516 1456029911 |
| المصدر المساهم: | UNIV OF MELBOURNE From OAIster®, provided by the OCLC Cooperative. |
| رقم الانضمام: | edsoai.on1456029911 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |