Physics – Plasma Physics
Scientific paper
Oct 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aps..dppbp1046k&link_type=abstract
American Physical Society, 42nd Annual Meeting of the APS Division of Plasma Physics combined with the 10th International Congre
Physics
Plasma Physics
Scientific paper
The towering ‘Pillars of Creation’ of the Eagle Nebula are a long-standing astrophysical mystery. In the Rayleigh-Taylor instability model, radiation from nearby stars photo-evaporates and accelerates the cloud surface, and the Pillars are falling ‘spikes’ of dense gas. The model reproduces recently measured fluid velocities in the Pillars, assuming the radiation drive and resulting acceleration decrease with time. Since the radiation may impact the surface at an angle, a ‘Tilted Radiation’ instability can cause the spikes to translate as waves whose tips may ‘break’, producing the small gas ‘bullets’ visible near the Pillars. In the cometary model, the Pillars consist of gas swept behind dense regions of the cloud impacted by supersonic ionization fronts. However, shocks should have destroyed such dense regions long ago. Theoretical and numerical evaluations of various models, implications for observations, and possible scaled verification experiments using intense lasers are presented. Work performed under the auspices of the U.S. Department of Energy by the Lawrence Livermore National Laboratory under contract number W-7405-ENG-48.
Farnsworth Richard
Kane Jave
Pound Marc
Remington Bruce
Ryutov Dmitri D.
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