Pittard, JM (2013) Self-sealing shells: blowouts and blisters on the surfaces of leaky wind-blown bubbles and supernova remnants. Monthly Notices of the Royal Astronomical Society, 435 (4). 3600 - 3613. ISSN 0035-8711
Abstract
Blowouts can occur when a dense shell confining hot, high-pressure gas ruptures. The venting gas inflates a blister on the surface of the shell. Here we examine the growth of such blisters on the surfaces of wind-blown bubbles (WBBs) and supernova remnants (SNRs) due to shell rupture caused by the Vishniac instability. On WBBs the maximum relative size of the blister (Rbstall/R) is found to grow linearly with time, but in many cases the blister radius will not exceed 20 per cent of the bubble radius. Thus blowouts initiated by the Vishniac instability are unlikely to have a major effect on the global dynamics and properties of the bubble. The relative size of blisters on SNRs is even smaller than on WBBs, with blisters only growing to a radius comparable to the thickness of the cold shell of SNRs. The small size of the SNR blowouts is, however, in good agreement with observations of blisters in the Vela SNR. The difference in relative size between WBB and SNR blisters is due to the much higher speed at which gas vents out of WBBs, which translates into a greater energy flux through a rupture of a given size from interior gas of a given pressure. Larger blisters are possible if shell ruptures are bigger than expected. We expect the observed velocity structure of SNR shells to be affected by the presence of blisters until the shell is no longer susceptible to ruptures, since the initial expansion of blisters is faster than the ongoing expansion of the shell.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2013 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record Pittard, JM (2013) Self-sealing shells: blowouts and blisters on the surfaces of leaky wind-blown bubbles and supernova remnants. Monthly Notices of the Royal Astronomical Society, 435 (4). 3600 - 3613. is available online at: http://dx.doi.org/10.1093/mnras/stt1552 |
Keywords: | ISM: bubbles; Hydrodynamics; Stars: mass-loss; ISM: supernova remnants; Supernova remnants; Shock waves; Stars: winds, outflows |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 20 Apr 2015 10:29 |
Last Modified: | 16 Jan 2018 11:58 |
Published Version: | http://dx.doi.org/10.1093/mnras/stt1552 |
Status: | Published |
Publisher: | Oxford University Press |
Identification Number: | 10.1093/mnras/stt1552 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:84011 |