Oscillon of ultra-light axion-like particle
Oscillon of ultra-light axion-like particle
复制标题
超轻轴子粒子振荡
DOI：
10.1088/1475-7516/2020/01/047
复制
发表时间：
2020
影响因子：
6.4
通讯作者：
Sonomoto Eisuke
中科院分区：
文献类型：
--
作者：
Kawasaki Masahiro;Nakano Wakutaka;Sonomoto Eisuke
超轻类轴子粒子（ULAP）是冷暗物质极具吸引力的候选者之一。由于质量为~ 10−22 eV的ULAP的de Broglie波长为Script O (kpc)，利用不确定原理抑制小尺度结构可以解决核心-尖峰问题。通常，ULAP被认为是均匀分布在现在的宇宙中。然而，在典型的ULAP电位中，振荡开始时的强自共振引起了大的波动，这可能导致密集局域物体振荡的形成。本文通过数值模拟证实了ULAP电位中振荡的形成，并解析推导了其寿命。
Ultra-Light axion-like particle (ULAP) is one of the attractive candidates for cold dark matter. Because the de Broglie wavelength of ULAP with mass∼ 10− 22 eV is Script O (kpc), the suppression of the small scale structure by the uncertainty principle can solve the core-cusp problem. Frequently, ULAP is assumed to be uniformly distributed in the present universe. In typical ULAP potentials, however, strong self-resonance at the beginning of oscillation invokes the large fluctuations, which may cause the formation of the dense localized object, oscillon. In this paper, we confirm the oscillon formation in a ULAP potential by numerical simulation and analytically derive its lifetime.