AI 中文总结
研究W43-MM1原星团核心区湍流和磁支撑，通过ALMA分子线观测和尘埃极化观测获取数据，利用维里定理分析，发现线宽污染和表面项遗漏阻碍非热支撑准确测量，简化维里分析有偏差。
AI 中文摘要
估计核心区的非热支撑水平对于限制恒星形成的最早阶段既具有挑战性又至关重要。我们量化了高质量原星团W43-MM1核心区内的动力学和磁支撑，并检验了用于解释观测结果的维里定理背后的假设。我们利用ALMA 12米分子线对DCN(3-2)、13CS(5-4)和CH3CN(5_3-4_3)的观测来估计动力学支撑。通过戴维斯-钱德拉塞卡-费米方法从尘埃极化观测中得出天空平面磁场强度(B_POS)，在三波束尺度（约12500天文单位）获得并利用密度场强度关系外推到核心尺度（约2500天文单位）。我们得出了45个核心（21个前恒星和24个原恒星）的动力学支撑估计值，其中21个也有磁场估计值。速度弥散范围为0.34至4.48千米/秒，核心尺度上的B_POS值跨度为1.1-49.3毫高斯。利用维里定理，仅考虑湍流时约70%的核心似乎对坍缩稳定，同时考虑动力学和磁支撑时约85%稳定(α_vir,B>1)。这些值出乎意料地高，特别是对于预期正在坍缩的原恒星核心。我们得出结论，有组织运动（1-3千米/秒，与先前观测研究一致）对线宽的污染，以及观测维里定理中表面项的遗漏，阻碍了对核心区非热支撑的准确测量。这突出表明，在评估核心区内的物理支撑机制时，简化的维里分析可能会引入显著偏差。
英文摘要
Estimating the level of non-thermal support in cores is both challenging and crucial for constraining the earliest stages of star formation. We quantify the kinetic and magnetic support operating within the cores of the high-mass protocluster W43-MM1, and test the assumptions behind the virial theorem used to interpret observations. We used ALMA 12m molecular line observations of DCN (3-2), 13CS (5-4), and CH3CN (5_3-4_3) to estimate kinetic support. The plane-of-sky magnetic field strength (B_POS) was derived from dust-polarization observations using the Davis-Chandrasekhar-Fermi method, obtained at the three-beam scale (~12500 au) and extrapolated to core scales (~2500 au) using the density-field strength relation. We derive kinetic support estimates for 45 cores (21 prestellar and 24 protostellar), of which 21 also have magnetic field estimates. Velocity dispersions range from 0.34 to 4.48 km/s, and B_POS values span 1.1-49.3 mG at core scales. Using the virial theorem, ~70% of cores appear stable against collapse when considering turbulence alone, and ~85% when combining both kinetic and magnetic support (alpha_vir,B > 1). These are unexpectedly high values, particularly for protostellar cores expected to be undergoing collapse. We conclude that contamination of linewidths by organized motions (1-3 km/s, consistent with previous observational studies), together with the omission of surface terms in the observational virial theorem, prevents accurate measurement of non-thermal support in cores. This highlights that simplified virial analyses can introduce significant biases when assessing physical support mechanisms within cores.
