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The role of the magnetic field in the fragmentation process: the case of G14.225-0.506 by Añez-López, N.; Busquet, G.; Koch, P. M.; Girart, J. M.; Liu, H. B.; Santos, F.; Chapman, N. L.; Novak, G.; Palau, A.; Ho, P. T. P.; Zhang, Q. is a scholarly article available to read on EtoBox.

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B-fields are predicted to play a role in the formation of filamentary structures and their fragmentation process. We aim at investigating the role of the B-field in the process of core fragmentation toward the hub-filament systems in the IRDC G14.2, which present different fragmentation level. We performed observations of the thermal dust polarization at 350 {\mu}m using the CSO toward the hubs. We applied the polarization--intensity-gradient method to estimate the significance of the B-field over the G-force. The B-field in Hub-N shows a uniform structure along the E-W orientation, perpendicular to the major axis of the hub-filament system. The I-gradient in Hub-N displays a local minimum coinciding with the dust core MM1a detected with interferometric observations. The B-field orientation is perturbed when approaching the dust core. Hub-S shows 2 local minima, reflecting the bimodal distribution of the B-field. In Hub-N, both E and W of the hub-filament system, the I-gradient and the B-field are parallel whereas they tend to be perpendicular when penetrating the filaments and hub. The analysis of the {\delta}- and {\Sigma} B-maps indicate that, the B-field cannot prevent the coll

Author

Añez-López, N.; Busquet, G.; Koch, P. M.; Girart, J. M.; Liu, H. B.; Santos, F.; Chapman, N. L.; Novak, G.; Palau, A.; Ho, P. T. P.; Zhang, Q.

Published

2020

Language

EN