Other
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21941807g&link_type=abstract
American Astronomical Society, AAS Meeting #219, #418.07
Other
Scientific paper
Contrary to the deceleration in the propagation of spherically expanding blast waves, the expansion of the Crab nebula shock front is accelerative according to observations in the last decades. We shall see that this acceleration is because of the detonation wave initiated by the strong shock between the nebula and the surrounding interstellar medium. This detonation wave, with an energy-generating reactive downstream, provides the needed power to maintain the propagation of the outer envelope of the nebula. Furthermore, relaxation of the curvature effect, which causes the reduction of the propagation velocity form the asymptotic planar state of Chapman-Jouguet velocities, explains the observed accelerative expansion of the shock front. The existences of detonation waves in other supernova remnants as well as the potential richness of reactive fluid fronts in various astronomical systems are also discussed. This work is supported by the startup fund for the Center for Combustion Energy at Tsinghua University.
Gao Yang
Law Chung K.
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