Bubbles and Superbubbles

Is the Plasma within Bubbles and Superbubbles Hot or Cold?

I review what is known about the temperature of the plasma within stellar wind bubbles and superbubbles. Classical theory suggests that it should be hot, with characteristic temperatures of order a million degrees. This temperature should be set by the balance between heating by the internal termination shocks of the central stellar winds and supernovae, which expand at thousands of km s, and c...

Is the Plasma within Bubbles and Superbubbles Hot or Cold?

Ambient Interstellar Pressure and Superbubble Evolution

High ambient interstellar pressure is suggested as a possible factor to explain the ubiquitous observed growth-rate discrepancy for supernova-driven superbubbles and stellar wind bubbles. Pressures of P/k ∼ 10 cm K are plausible for regions with high star formation rates, and these values are intermediate between the estimated Galactic mid-plane pressure and those observed in starburst galaxies...

The History and Future of the Local and Loop I Bubbles

Context. The Local and Loop I superbubbles are the closest and best investigated supernova (SN) generated bubbles and serve as test laboratories for observations and theories of the interstellar medium. Aims. Since the morphology and dynamical evolution of bubbles depend on the ambient density and pressure distributions, a realistic modelling of the galactic environment is crucial for a detaile...

The H I Environment of Three Superbubbles in the Large Magellanic Cloud

The ambient interstellar environment of windand supernova-driven superbubbles strongly affects their evolution, but its properties are rarely well-determined. We have therefore obtained H I aperture synthesis imaging of the environment around three similar, optically-selected superbubble nebulae in the Large Magellanic Cloud. The resulting H I maps show that the ambient gas distribution around ...