SIMBAD references

2021ApJ...906...80K - Astrophys. J., 906, 80-80 (2021/January-2)

The CARMA-NRO Orion survey: filament formation via collision-induced magnetic reconnection-the Stick in Orion A.

KONG S., OSSENKOPF-OKADA V., ARCE H.G., BALLY J., SANCHEZ-MONGE A., McGEHEE P., SURI S., KLESSEN R.S., CARPENTER J.M., LIS D.C., NAKAMURA F., SCHILKE P., SMITH R.J., MAIRS S., GOODMAN A. and MAUREIRA M.J.

Abstract (from CDS):

A unique filament is identified in the Herschel maps of the Orion A giant molecular cloud. The filament, which we name the Stick, is ruler-straight and at an early evolutionary stage. Transverse position-velocity diagrams show two velocity components closing in on the Stick. The filament shows consecutive rings/forks in C18O (1-0) channel maps, which is reminiscent of structures generated by magnetic reconnection. We propose that the Stick formed via collision-induced magnetic reconnection (CMR). We use the magnetohydrodynamics code Athena++ to simulate the collision between two diffuse molecular clumps, each carrying an antiparallel magnetic field. The clump collision produces a narrow, straight, dense filament with a factor of >200 increase in density. The production of the dense gas is seven times faster than freefall collapse. The dense filament shows ring/fork-like structures in radiative transfer maps. Cores in the filament are confined by surface magnetic pressure. CMR can be an important dense-gas-producing mechanism in the Galaxy and beyond.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Molecular clouds - Magnetic fields - Star formation - Interstellar filaments - Interstellar medium - Giant molecular clouds - Millimeter astronomy - Computational astronomy - Astrophysical fluid dynamics - Magnetohydrodynamical simulations - Observational astronomy - Theoretical models

Simbad objects: 4

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2021.06.15-07:11:10

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