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The progenitor system(s) and the explosion mechanism(s) of Type Ia supernovae(SNe Ia) are still under debate. Non-electromagnetic observables, in particulargravitational waves and neutrino emission, of thermonuclear supernovae are acomplementary window to light curves and spectra for studying these enigmaticobjects. A leading model for SNe Ia is the thermonuclear incineration of anear-Chandrasekhar mass carbon-oxygen white dwarf star in a"delayed-detonation". We calculate a three-dimensional hydrodynamic explosionfor the N100 delayed-detonation model extensively discussed in the literature,taking the dynamical effects of neutrino emission from all importantcontributing source terms into account. Although neutrinos carry away $2 \times10^{49}$ erg of energy, we confirm the common view that neutrino energy lossesare dynamically not very important, resulting in only a modest reduction of thefinal kinetic energy by two per cent. We then calculate the gravitational wavesignal from the time evolution of the quadrupole moment. Our model radiates $7\times 10^{39}$ erg in gravitational waves and the spectrum has a pronouncedpeak around 0.4 Hz. Depending on viewing angle and polarization, we find thatthe future space-based gravitational wave missions DECIGO and BBO would be ableto detect our source to a distance of 1.3 Mpc. We predict a clear signature ofthe deflagration-to-detonation transition in the neutrino and the gravitationalwave signals. If observed, such a feature would be a strong indicator of therealization of delayed-detonations in near-Chandrasekhar mass white dwarfs.

Neutrino and gravitational wave signal of a delayed-detonation model of Type Ia supernovae