The Dynamics of Superbubbles in the Large Magellanic Cloud

Details The Dynamics of Superbubbles in the Large Magellanic Cloud The Dynamics of Superbubbles in the Large Magellanic Cloud

Aug 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...467..666o&link_type=abstract

Astrophysical Journal v.467, p.666

Astronomy and Astrophysics

Astronomy

80

Ism: Bubbles, Ism: Kinematics And Dynamics, Galaxies: Magellanic Clouds, Ism: Supernova Remnants

Scientific paper

Based on the stellar populations observed within this sample of LMC superbubbles, I use a numerical version of the standard, pressure-driven bubble model to investigate the shell dynamics. The results fall into two distinct categories corresponding to (1) a subset of objects for which the observed expansion velocity is too large for the observed shell radius ("high-velocity" superbubbles) and (2) a subset of objects that appears more dynamically consistent with the model ("low-velocity" superbubbles). Both subsets of objects imply an overestimate in the shell growth rate equivalent to an overestimate in input power by up to an order of magnitude. The high-velocity objects exhibit X-ray evidence of supernova activity, suggesting that the dynamical discrepancy is due to acceleration by supernova remnant impacts.

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