Research Article
Magnetic Field Structure and Star Formation Efficiency in Clump-Scale Star-Forming Regions: A JCMT POL-2 Analysis
Issue:
Volume 14, Issue 2, June 2026
Pages:
20-28
Received:
16 June 2026
Accepted:
27 June 2026
Published:
17 July 2026
DOI:
10.11648/j.ijass.20261402.11
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Abstract: We present a clump-scale observational study of magnetic-field structure and star formation efficiency (SFE) using published dust polarization observations obtained with the James Clerk Maxwell Telescope (JCMT) POL-2 instrument. The sample consists of 11 predominantly high-mass star-forming clumps associated with clustered and filamentary molecular environments. Plane-of-sky magnetic-field strengths derived from published Davis-Chandrasekhar-Fermi (DCF) analyses were examined together with magnetic-field morphology and star formation efficiency measurements compiled from the literature. The results show that the relationship between magnetic-field strength and star formation efficiency is not characterized by a simple monotonic trend. Spearman rank correlation analysis indicates a weak and statistically insignificant negative relationship between magnetic-field strength and SFE, while the observed -SFE distribution exhibits substantial scatter across the sample. Regions with comparable magnetic-field strengths therefore display significantly different star formation efficiencies, indicating that magnetic-field strength alone does not uniquely regulate star formation at clump scales. Representative JCMT POL-2 polarization maps show that the sampled regions are dominated by ordered hourglass-like and partially pinched magnetic-field morphologies. Hourglass-like structures are generally associated with intermediate to strong magnetic fields and relatively low or moderate efficiencies, whereas pinched morphologies occupy a broader range of SFE values. The results support a scale-dependent interpretation of magnetic regulation in which magnetic fields influence collapse geometry and dense gas structure, while star formation efficiency emerges from the coupled interaction of gravity, fragmentation, turbulence, filamentary accretion, and stellar feedback within dynamically evolving molecular clumps.
Abstract: We present a clump-scale observational study of magnetic-field structure and star formation efficiency (SFE) using published dust polarization observations obtained with the James Clerk Maxwell Telescope (JCMT) POL-2 instrument. The sample consists of 11 predominantly high-mass star-forming clumps associated with clustered and filamentary molecular...
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,
Jemima Ngozi Ogwo
