Speaker
Description
Magnetic fields play an important role in the star formation process and collapsing dense
cores. However, it is difficult to directly measure the magnetic field strength in observation. The polarization–intensity gradient method is a new approach to estimate the magnetic field strength using polarization angle and intensity gradient, which can provide the map of position-dependent magnetic field strength estimates. In this project, we evaluate the applicability of this method to real observational data and to determine whether it can provide robust magnetic field strength estimates in realistic star-forming environments. We first simulate collapsing dense cores with RAMSES and apply the polarization–intensity gradient method to estimate their magnetic field strength. Then we compare the estimated field strengths and the model to calculate the uncertainty. The results suggest that the polarization–intensity gradient method can well estimate the magnetic field strength in collapsing dense cores with an uncertainty smaller than a factor of 3.