Does the Magnetic Field Suppress Fragmentation in Massive Dense Cores

摘要: Theoretical and numerical works indicate that a strong magnetic field should suppress fragmentation in dense cores. However, this has never been tested observationally relatively large sample of fragmenting massive Here we use the polarization data obtained Submillimeter Array Legacy Survey Zhang et al. to build 18 cores where both properties are studied uniform way. We measured level, Nmm, within view common all regions, 0.15 pc, with mass sensitivity about 0.5 Msun, spatial resolution 1000 au. In order obtain strength using Davis-Chandrasekhar-Fermi method, estimated dispersion position angles, velocity H13CO+(4-3) gas, density each core, averaged pc. A correlation is found between Nmm average parental although significant scatter. When large-scale systematic motions separated from only small-scale (turbulent) contribution taken into account, tentative mass-to-flux ratio, as suggested by theoretical works.