来自TIGRESS的尘埃极化图：E/B功率不对称性和TE相关性
Dust Polarization Maps from TIGRESS: E/B power asymmetry and TE correlation
摘要：
我们提出了第一个大的一套全天空合成尘埃偏振图直接来自自洽磁流体力学模拟使用TIGRESS框架。在这个模拟中，湍流主要是由超新星爆炸驱动的，其速率由反馈回路自我调节。模拟覆盖了湍流的外尺度和惯性范围，具有一致的高分辨率。剪切盒中使用的模拟与解决超新星驱动的湍流，使捕捉的产生，增长和饱和的湍流和平均磁场。我们构建偏振图在353 GHz的多相，湍流，磁化星际介质（ISM）的模型内的观察者所看到的。为了对模拟的ISM状态进行全面采样，我们使用了350个快照，跨度超过3.5亿年（超过6个反馈回路）和9个有代表性的观察者。合成天空显示出普遍的E/B功率不对称性（EE>BB）和正的TE相关性，与普朗克卫星的观测结果基本一致。然而，EE/BB~1.4-1.7和TE/（TT*EE）^{1/2}~0.2-0.3的范围通常较低。我们发现大波动的E/B不对称性和TE相关性取决于观察者的位置，和时间波动的星际介质属性由于恒星形成的爆发。这些合成地图公开提供微波天空的新模型。
英文摘要：
We present the first large set of all-sky synthetic dust polarization maps derived directly from a self-consistent magnetohydrodynamics simulation using the TIGRESS framework. Turbulence in this simulation is predominantly driven by supernova explosions, with rates that are self-consistently regulated by feedback loops. The simulation covers both the outer scale and inertial range of turbulence with uniformly high resolution. The shearing-box utilized in the simulation in concert with resolved supernova-driven turbulence enables to capture the generation, growth, and saturation of both turbulent and mean magnetic fields. We construct polarization maps at 353 GHz as seen by observers inside a model of the multiphase, turbulent, magnetized interstellar medium (ISM). To fully sample the simulated ISM state, we use 350 snapshots spanning over ~350Myr (more than six feedback loops) and nine representative observers. The synthetic skies show a prevalent E/B power asymmetry (EE>BB) and positive TE correlation in broad agreement with observations by the Planck satellite. However, the ranges of EE/BB~1.4-1.7 and TE/(TT*EE)^{1/2}~0.2-0.3 are generally lower. We find large fluctuations of E/B asymmetry and TE correlation depending on the observer's position, and temporal fluctuations of interstellar medium properties due to bursts of star formation. The synthetic maps are made publicly available to provide novel models of the microwave sky.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
