A Common Explosion Mechanism for Type Ia Supernovae

  title={A Common Explosion Mechanism for Type Ia Supernovae},
  author={Paolo A. Mazzali and Friedrich K. R{\"o}pke and Stefano Benetti and W Hillebrandt},
  pages={825 - 828}
Type Ia supernovae, the thermonuclear explosions of white dwarf stars composed of carbon and oxygen, were instrumental as distance indicators in establishing the acceleration of the universe's expansion. However, the physics of the explosion are debated. Here we report a systematic spectral analysis of a large sample of well-observed type Ia supernovae. Mapping the velocity distribution of the main products of nuclear burning, we constrain theoretical scenarios. We find that all supernovae have… 

The nebular spectra of the Type Ia supernova 1991bg: further evidence of a non-standard explosion

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Exclusion of a luminous red giant as a companion star to the progenitor of supernova SN 2011fe

The luminosity of the progenitor system (especially the companion star) is 10–100 times fainter than previous limits on other type Ia supernova progenitors systems, allowing us to rule out luminous red giants and almost all helium stars as the mass-donating companion to the exploding white dwarf.



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We present a new mechanism for Type Ia supernova explosions in massive white dwarfs. The scenario follows from relaxing assumptions of symmetry and involves a detonation born near the stellar

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It is shown that the high-redshift supernova SNLS-03D3bb has an exceptionally high luminosity and low kinetic energy that both imply a super-Chandrasekhar-mass progenitor, which may provide an explanation for the observed trend that overluminous type Ia supernovae occur only in ‘young’ environments.

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The flame born in the deep interior of a white dwarf that becomes a Type Ia supernova is subject to several instabilities, the combination of which determines the observational characteristics of the

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Analytic solutions for light curves, effective temperatures, and broad-band colors of Type I supernovae are presented. The method is generalized to include effects of finite (large) initial radius

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The observable properties of a Type Ia supernova are sensitive to how the nuclear runaway ignites in a Chandrasekhar-mass white dwarf: at a single point at its center, off-center, or at multiple

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The nebular spectra of the energetic Type Ic supernova SN 1998bw (hypernova) are studied. The transition to the nebular phase occurred at an epoch of about 100 days after outburst, which is assumed

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We present spectral and photometric observations of 10 Type Ia supernovae (SNe Ia) in the redshift range 0.16 ≤ z ≤ 0.62. The luminosity distances of these objects are determined by methods that

Three-dimensional Models for High-Velocity Features in Type Ia Supernovae

Spectral synthesis in three-dimensional space for the earliest spectra of Type Ia supernovae (SNe Ia) is presented. In particular, the high-velocity absorption features that are commonly seen at the

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By coupling observations of type Ia supernovae with results obtained from the best available numerical mod- els we constrain the Hubble constant, independently of any external calibrators. We find an