Type Ia Supernova Cosmology from a Supernova Modeller Point of View

Details Type Ia Supernova Cosmology from a Supernova Modeller Point of View Type Ia Supernova Cosmology from a Supernova Modeller Point of View

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aipc..924..218d&link_type=abstract

THE MULTICOLORED LANDSCAPE OF COMPACT OBJECTS AND THEIR EXPLOSIVE ORIGINS. AIP Conference Proceedings, Volume 924, pp. 218-225

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Supernovae, Dark Energy, Faint Blue Stars, White Dwarfs, Degenerate Stars, Nuclei Of Planetary Nebulae, Nucleosynthesis In Novae, Supernovae, And Other Explosive Environments, Stellar Structure, Interiors, Evolution, Nucleosynthesis, Ages

Scientific paper

The accuracy needed to identify the nature of dark energy in the Universe is one order of magnitude smaller than the present scatter in the observed local relation used to calibrate Type Ia SNe as standard candles. In order to reduce this scatter and to identify potential evolutionary effects, we have studied the influence of the physical and chemical properties of progenitors on SNe Ia light curves. First, we considered the mass and composition of WD progenitors and then we took into account rotation during the WD accretion phase, obtaining super-Chandrasekhar mass WDs. Differences in the maximum magnitude are of the same order as the present scatter in the calibration relation. In the context of the one dimensional delayed detonation model we assume the same transition density in all our models, implying that similar amounts of radioactive nickel are synthesized and, thus, similar magnitudes at the maximum epoch of the light curve are obtained. To establish, from a theoretical point of view, the required links between progenitors and outcomes, we have to fully understand the physics of Type Ia SNe, otherwise we may have already reached their limit as a probe of the structure of the Universe.

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