Explosion Scenarios & Propagation of Burning Fronts: Difference between revisions
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====Suggested Starting Points==== | ====Suggested Starting Points==== | ||
===Assigned Reading=== | ===Assigned Reading=== | ||
* [http://adsabs.harvard.edu/abs/2006ApJ...652L.101M Motohara et al; 2006] | |||
* [http://arxiv.org/abs/astro-ph/0301334 Hoeflich et al; 2003] | |||
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==Discussion== | ==Discussion== | ||
* What is the difference between a "deflagration" and a "detonation"? Generally speaking, deflagration is subsonic and propagates through thermal conductivity. Essentially, fire as we know it is deflagration. Detonation is a supersonic shock wave and propagates through a fluid due to an energy release in a reaction zone. Material ignites due to temperature increase from compression from the shock wave, and the burning releases energy. Detonation is more powerful than deflagration. | |||
NOTE: According to Firefox, "deflagration" isn't a word. At what point does our vocabulary stop becoming specialized and start becoming real words as according to spell check? Just wondering. | |||
* What are the problems with a pure deflagration? | |||
* What are the problems with a pure detonation? | |||
The problems with a pure detonation is that all isotopes created from the explosion would be the Iron group (Fe,Co,Ni). This however is not what is seen observationally. | |||
* Looking at late-time spectra from a Type Ia SN, what would asymmetries from the deflagration/detonation look like? | |||
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[http://wiki.physics.fsu.edu/wiki/index.php/AST4218/5315:_Astrophysical_Seminar_-_Fall_2009 Back to Astro Seminar] | [http://wiki.physics.fsu.edu/wiki/index.php/AST4218/5315:_Astrophysical_Seminar_-_Fall_2009 Back to Astro Seminar] | ||
Latest revision as of 16:28, 6 October 2009
Presenter : TBD
Suggested Starting Points
Assigned Reading
Discussion
- What is the difference between a "deflagration" and a "detonation"? Generally speaking, deflagration is subsonic and propagates through thermal conductivity. Essentially, fire as we know it is deflagration. Detonation is a supersonic shock wave and propagates through a fluid due to an energy release in a reaction zone. Material ignites due to temperature increase from compression from the shock wave, and the burning releases energy. Detonation is more powerful than deflagration.
NOTE: According to Firefox, "deflagration" isn't a word. At what point does our vocabulary stop becoming specialized and start becoming real words as according to spell check? Just wondering.
- What are the problems with a pure deflagration?
- What are the problems with a pure detonation?
The problems with a pure detonation is that all isotopes created from the explosion would be the Iron group (Fe,Co,Ni). This however is not what is seen observationally.
- Looking at late-time spectra from a Type Ia SN, what would asymmetries from the deflagration/detonation look like?