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Asymmetric Explosions of Type Ia Supernovae
Astrophysics · Submitted 27 Aug 2002
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We have examined the effects of magnetic fields on the fractalization of the front considering a white dwarf with a nearly dipolar magnetic field and found an intrinsic asymmetry on the velocity field of the expanding plasma.
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The abstract, sentence by sentence
The burning speed of a thermonuclear supernova front could be described by the fractal model of combustion. We have examined the effects of magnetic fields on the fractalization of the front considering a white dwarf with a nearly dipolar magnetic field and found an intrinsic asymmetry on the velocity field of the expanding plasma. For white dwarf's magnetic fields of 10^8-10^9 G at the surface, and assuming a field roughly 10 times greater near the center, we have found asymmetries in the velocity field > 10-20 % at rho ~ 10^8 g cm^(-3), produced between the magnetic polar and the equatorial axis of the remnant. This effect may be related to the asphericities inferred from spectro-polarimetric observations of very young SN Ia remnants (for example: SN 1999by). In the present work, we analyse the dependence of the asymmetry with the composition of the white dwarf progenitor.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | The burning speed of a thermonuclear supernova front could be described by the fractal model of combustion. | background 0.98 | 0.08 | 0.05 | hedged possibility 1.00 |
| s1 | We have examined the effects of magnetic fields on the fractalization of the front considering a white dwarf with a nearly dipolar magnetic field and found an intrinsic asymmetry on the velocity field of the expanding plasma. | contribution 0.59 | 0.96 | 0.44 | asserted 1.00 |
| s2 | For white dwarf's magnetic fields of 10^8-10^9 G at the surface, and assuming a field roughly 10 times greater near the center, we have found asymmetries in the velocity field > 10-20 % at rho ~ 10^8 g cm^(-3), produced between the magnetic polar and the equatorial axis of the remnant. | result 1.00 | 0.95 | 0.48 | asserted 1.00 |
| s3 | This effect may be related to the asphericities inferred from spectro-polarimetric observations of very young SN Ia remnants (for example: SN 1999by). | interpretation 0.99 | 0.09 | 0.10 | hedged possibility 1.00 |
| s4 | In the present work, we analyse the dependence of the asymmetry with the composition of the white dwarf progenitor. | contribution 0.98 | 0.81 | 0.07 | asserted 0.71 |
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Original abstract
The burning speed of a thermonuclear supernova front could be described by the fractal model of combustion. We have examined the effects of magnetic fields on the fractalization of the front considering a white dwarf with a nearly dipolar magnetic field and found an intrinsic asymmetry on the velocity field of the expanding plasma. For white dwarf's magnetic fields of 10^8-10^9 G at the surface, and assuming a field roughly 10 times greater near the center, we have found asymmetries in the velocity field > 10-20 % at rho ~ 10^8 g cm^(-3), produced between the magnetic polar and the equatorial axis of the remnant. This effect may be related to the asphericities inferred from spectro-polarimetric observations of very young SN Ia remnants (for example: SN 1999by). In the present work, we analyse the dependence of the asymmetry with the composition of the white dwarf progenitor.
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Papers whose main result relates to this one's
States the same result 1 paper
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Considering the strongest values inferred for a white dwarf's magnetic fields with strengths up to $10^{8}-10^{9}$ G at the surface and assuming that the field near the centre is roughly 10 times greater, asymmetries in the velocity field higher than $10-20 %$ are produced between the magnetic polar and the equatorial axis of the remnant which may be related to the asymmetries found from recent spectropolarimetric observations of very young SN Ia remnants.
Magnetic field effects on the thermonuclear combustion front of Chandrasekhar mass white dwarfs · 1.00
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