论文标题
受C-shock影响的旋转纳米颗粒：对恒星形成区域的射击毫米排放的影响
Spinning Nanoparticles Impacted by C-shock: Implications for Radio-millimeter Emission from Star-forming Regions
论文作者
论文摘要
我们研究了三种典型的星际培养基（ISM）条件（ISM）围绕恒星形成区域（冷中性培养基，温暖的中性介质和光静脉解离区域）的三种典型插图培养基（ISM）条件的反射毫米光谱能量分布的影响 - 通过比较三个主要贡献者的发射剂：免费，免费，热量，热粉尘和AME。特别是，对于旋转纳米颗粒（即AME的潜在载体），我们考虑了由于磁性冲击中尘埃晶粒与超音速中性流之间碰撞引起的旋转过程的离心力而引起的已知晶粒破坏机制（C-shock）。我们证明，如果磁场中的ISM受到超新星爆炸在大规模恒星形成的早期阶段（$ \ \ lyssim 10 $ Myr）中产生的C震动的影响，则AME可以显着或几乎完全抑制相对于免费的免费和热粉尘连续性，如果谷物的谷物强度足够小。这项研究可能阐明了从大型恒星簇中优先观察到的罕见的AME观察到的AME观察结果，并提出了根据星形形成区域的时间进化的“ AME的兴衰”情景。
We investigate the impact of anomalous microwave emission (AME) on the radio-millimeter spectral energy distribution for three typical interstellar medium (ISM) conditions surrounding star-forming regions -- cold neutral medium, warm neutral medium, and photodissociation region -- by comparing the emissivities of three major contributors: free-free, thermal dust emission, and AME. In particular, for spinning nanoparticles (i.e., potential carriers of AME), we consider a known grain destruction mechanism due to a centrifugal force from spin-up processes caused by collisions between dust grains and supersonic neutral streams in a magnetized shock (C-shock). We demonstrate that, if the ISM in a magnetic field is impacted by a C-shock developed by a supernova explosion in the early phase of massive star-formation ($\lesssim 10$ Myr), AME can be significantly or almost entirely suppressed relative to free-free and thermal dust continuum emission if the grain tensile strength is small enough. This study may shed light on explaining the rare observations of AME from extragalactic star-forming regions preferentially observed from massive star clusters and suggest a scenario of "the rise and fall of AME" in accordance with the temporal evolution of star-forming regions.
