TL;DR
This paper presents a detailed analysis of the DR21 Main molecular cloud, modeling its gravitational collapse, magnetic field structure, and physical properties using multi-faceted observational data.
Contribution
It introduces a comprehensive 3D model of the collapsing cloud and magnetic field based on flux, polarimetric, and spectroscopic measurements, advancing understanding of large-scale gravitational collapse.
Findings
DR21 Main is undergoing large-scale gravitational collapse.
The magnetic field is aligned with the collapse axis.
The cloud's physical parameters are quantitatively characterized.
Abstract
The molecular cloud, DR21 Main, is an example of a large-scale gravitational collapse about an axis near the plane of the sky where the collapse is free of major disturbances due to rotation or other effects. Using flux maps, polarimetric maps, and measurements of the field inclination by comparing the line widths of ion and neutral species, we estimate the temperature, mass, magnetic field, and the turbulent kinetic, mean magnetic, and gravitational potential energies, and present a 3D model of the cloud and magnetic field.
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