Other
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...212.6601k&link_type=abstract
American Astronomical Society, AAS Meeting #212, #66.01; Bulletin of the American Astronomical Society, Vol. 40, p.256
Other
Scientific paper
The interaction of shock waves with interstellar clouds is a common event in the interstellar medium (ISM). Supernova explosions produce blast waves that propagate into the ISM interacting with interstellar clouds, compressing them and destroying them. This process plays a significant role in the formation of multiphase structures in the ISM. Compression by shocks may be able to trigger star formation in interstellar clouds. In the early universe, supernova explosions of the first stars may be responsible for the first generation of turbulence and the first metal enrichment in the intergalactic medium after the big bang. Other energetic events, such as stellar winds of massive stars, bipolar outflows of young stellar objects, cloud cloud collisions and spiral density waves, can also produce interstellar shocks that interact with the inhomogeneities in the ISM. Thus, understanding how shock waves interact with interstellar clouds is a crucial step in understanding the structure and evolution of the ISM. In this talk, I will present the results of a series of scaled laboratory experiments that we have performed on both the Nova and Omega laser facilities that investigate this important interaction. I will compare the results of these experiments with detailed multi-dimensional hydrodynamic simulations that give insight into the destruction of ISM clouds and development of vortex rings and turbulent stripping of these clouds by SN shocks. I will introduce a theory that accounts for the turbulent stripping and vortex ring development. Comparisons with observations of shocked clouds in the eastern region of the Pup A supernova remnant and scaled experiments will be made. Finally, implications for interstellar turbulence and for star formation will be discussed.
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