论文标题
自我互动超轻轴线暗物质中孤子的潮汐破坏
Tidal disruption of solitons in self-interacting ultralight axion dark matter
论文作者
论文摘要
超轻轴（ULAS）是有希望的暗物质候选者，可以对非线性尺度的结构形成和演变产生明显的影响，相对于冷，无碰撞的无碰撞暗物质（CDM）范式。但是，ULA模型中的大多数结构形成研究都不包括自我互动的影响，这些效果通常会产生。在这里，我们研究了孤子的潮汐演化如何受到ULA自我交互强度和符号的影响。具体而言，使用伪侧求解器ultradark.jl，我们模拟了自我相互作用的孤子核的潮汐破坏，因为它们绕$ 10^{11}}} 〜m _ {\ mathrm {\ odot}} $ navarro-frenk-white frenk-white cdm host host host host host hot fidul and fidul and fidu ula ula的范围的范围的绘制$ 10^{ - 22} \ Mathrm {ev} $。我们发现，令人反感的（有吸引力的）自我互动显着加速了（减速）孤独的潮汐破坏。我们还确定了决定潮汐破坏效率的自我交流强度与单齿质量之间的退化，因此，在$ \ sim 50 \％$级别上，破坏时间尺度会受到影响，以$ \ sim 50 \％$级别的变化，无尺寸的ULA自我耦合$λ= -10 = -10 = -10^{ - 92} $ = -92} $ to { - 92} $至$ $ $ $ $ ula = 10^$ 92} $ 92} $ 92。
Ultralight axions (ULAs) are promising dark matter candidates that can have a distinct impact on the formation and evolution of structure on nonlinear scales relative to the cold, collisionless dark matter (CDM) paradigm. However, most studies of structure formation in ULA models do not include the effects of self-interactions, which are expected to arise generically. Here, we study how the tidal evolution of solitons is affected by ULA self-interaction strength and sign. Specifically, using the pseudospectral solver UltraDark.jl, we simulate the tidal disruption of self-interacting solitonic cores as they orbit a $10^{11}~M_{\mathrm{\odot}}$ Navarro-Frenk-White CDM host halo potential for a range of orbital parameters, assuming a fiducial ULA particle mass of $10^{-22}\mathrm{eV}$. We find that repulsive (attractive) self-interactions significantly accelerate (decelerate) soliton tidal disruption. We also identify a degeneracy between the self-interaction strength and soliton mass that determines the efficiency of tidal disruption, such that disruption timescales are affected at the $\sim 50\%$ level for variations in the dimensionless ULA self-coupling from $λ=-10^{-92}$ to $λ=10^{-92}$.
