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Theses

Étude de la variabilité des Supernovae de type Ia observées par la collaboration Nearby Supernova Factory

Abstract : One of the current limitations of type Ia supernovae used as distance indicators is that different sources of variabilitiy are mixed into the empirical standardization of their distance modulus. Using the nearby SNe Ia spectral sample observed by the Nearby Supernova Factory collaboration with its instrument SNIFS (Supernovae Intergral Field Spectrograph), this thesis mainly focuses on this deficiency using the measurement of spectral indicators. The first part of the thesis presents the scientific context as well as the sample used in the analysis. The second part describes the measurement of spectral indicators and their properties in the presence of interstellar dust extinction. The third part is a study of the correlation between spectral indicators and their impact as standardization parameters. In the last part, we use these spectral indicators to construct a mean extinction law for type Ia supernovae.
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https://tel.archives-ouvertes.fr/tel-00660289
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Submitted on : Monday, January 16, 2012 - 1:08:24 PM
Last modification on : Friday, September 10, 2021 - 1:50:10 PM
Long-term archiving on: : Thursday, March 30, 2017 - 10:43:40 PM

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  • HAL Id : tel-00660289, version 1

Citation

Nicolas Chotard. Étude de la variabilité des Supernovae de type Ia observées par la collaboration Nearby Supernova Factory. Astrophysique galactique [astro-ph.GA]. Université Claude Bernard - Lyon I, 2011. Français. ⟨tel-00660289v1⟩

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