Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...243..512e&link_type=abstract
Astrophysical Journal, Part 1, vol. 243, Jan. 15, 1981, p. 512-525.
Astronomy and Astrophysics
Astrophysics
27
Interstellar Magnetic Fields, Magnetic Effects, Molecular Clouds, Translational Motion, Astronomical Models, Interstellar Gas, Shock Wave Propagation
Scientific paper
A solution for the translational motion of a giant cloud complex in an oscillating external medium is obtained by assuming a simplified cloud-field geometry. The field strength in the cloud is represented by the virial theorem value. The results are applied to cloud motions in a spiral density wave, and the origin of the cloud-cloud velocity dispersion is examined. The motion of a dense cloud that is magnetically connected to a shocked external medium is calculated with an application to molecular clouds that encounter a shock in a spiral density wave. The magnetic field which connects the cloud to the ambient gas will stretch during this interaction causing the acceleration of the cloud and possibly triggering star formation.
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