from The Century Dictionary.
- noun A kindling or setting on fire; burning; combustion.
- noun Specifically— Oxidation by the rapid combustion of a substance, attended with an extremely sudden evolution of flame and vapor. It is accomplished by mixing the substance with potassium chlorate or nitrate (niter), and projecting the mixture in small portions at a time into a red-hot crucible.
- noun The rapid combustion of metals by the electric spark.
from the GNU version of the Collaborative International Dictionary of English.
- noun A burning up; conflagration.
- noun (Chem.) The act or process of deflagrating.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun The act of
deflagrating; an intense fire; a conflagrationor explosion. Specifically, combustionthat spreads subsonicallyvia thermal conduction.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun combustion that propagates through a gas or along the surface of an explosive at a rapid rate driven by the transfer of heat
Sorry, no etymologies found.
This is why it is called the deflagration- to-detonation DDT transition.
If it is a deflagration the explosion propagates at subsonic velocity, as opposed to a full fledge detonation where there is a supersonic shock front.
First, I am not saying there will not be a deflagration
Get some facts about explosion, deflagration and detonation, be it for gas, kerosene or H2.
As for mass ranges, first of all it ofc doesnt have to be 2 WD of equal mass so the limits only occur for the pair, and for the upper masslimits orbital motion and deflagration point are very important factors, as it is the deflagration that counters the collapse in the first place.
I dont know if there is a way to determine this except in simulations, but 2 WD orbiting very closely will either grace eachother that should set off the deflagration or one of the WD will be gravitationally disrupted and mass transferred over.
The propellant deflagration produced only a fireball, and a small one at that, by comparison to a LOX-hydrocarbon mix.
To answer your question the deflagration likely is caused during the collapse of the white dwarf in the seven to eight seconds it takes to reach its highest density during the collapse, after which the star detonates when a certain density is reached.
The deflagration not being sufficient to unbind the star, and thus cannot halt the collapse, it creates a neutronstar although all the other parameters are the same as for a SNIa.
The deflagration is what signifies a SNIa, and it is possible that there exists a subclass (not convincingly detected) of SN where the progenitor (or one of its progenitors) are a magnesium WD.