Interaction of molecular bipolar flows with interstellar condensations - Sweeping magnetic twist mechanism and the blobs in LYNDS 1551 molecular flow

Details Interaction of molecular bipolar flows with interstellar condensations - Sweeping magnetic twist mechanism and the blobs in LYNDS 1551 molecular flow Interaction of molecular bipolar flows with interstellar condensations - Sweeping magnetic twist mechanism and the blobs in LYNDS 1551 molecular flow

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pasj...42...39s&link_type=abstract

Astronomical Society of Japan, Publications (ISSN 0004-6264), vol. 42, no. 1, 1990, p. 39-67. Research supported by the Japan So

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Computational Astrophysics, Interstellar Magnetic Fields, Interstellar Matter, Molecular Flow, Acceleration (Physics), Magnetohydrodynamic Waves, Shock Waves, Spatial Distribution, Star Formation

Scientific paper

The interaction of a bipolar molecular flow with interstellar condensations is examined (using the sweeping-magnetic-twist model) by performing 2.5-dimensional MHD numerical simulations. A torsional Alfven wave propagating with a hollow cylindrical bipolar flow interacts with the condensation, and the magnetic twist accumulates in the region between the flow and the condensation. The stored magnetic twist increases with time, causing various nonlinear effects. Two cases for the condensation configuration are examined: sphericl shape and ring-like shape. In the spherical case, the condensation, itself, is squeezed by the pinch effect. In the ring-shaped case, the hot gas near the axis is pinched and flow is generated along the axis due to an enhanced gas pressure resulting from the pinch. The velocity of the hot flow is comparable to that of the original cold bipolar flow. The results in the ring-shaped case may explain the observed characteristics in the velocity field around the blob observed in the L1551 flow.

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