The data from the Nanshan 26m telescope observing the Taurus region

The result analysis shows that HIA is commonly present in Taurus molecular clouds. Level of HIA of NH3 (1,1) satellite line inside and outside the line The mean values are 1.07 and 1.15, both greater than 1, and there is a systematic contraction or expansion motion HIA under the Expansion Motion (CE) model and Hyperfine Selective Trapping (HST) model 55.7% and 21.7% respectively, indicating that the mechanism of HIA generation in this region is consistent with the CE model prediction.

In addition, the HIA quadrant The distribution of the graph shows that the ridges of the B211/213 fiber structure may exhibit large-scale gas influx movement. Correlation analysis shows that the area The domain distribution is positively correlated with velocity dispersion in the HIA of the CE model, and negatively correlated with velocity dispersion in the HIA of the HST model.