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Communication Dans Un Congrès Année : 2016

Sugar: When Spectra Help Standardizing Supernovae

Résumé

Type Ia supernovae (SNIa) have now a long track record of producing strong constraints on cosmological parameters, and are expected to play still an important role in future stage IV experiments such as LSST. However, our understanding of their variability has gone few alterations through the years: popular spectral energy density (SED) models like SALT-II for instance still describe supernovae as depending mostly on 2 parameters. They however do not reflect the observed spectral diversity of Type Ia supernovae. With the help of the Nearby Supernova Factory data, we revisit the spectral diversity of the SNIa to build a novel SED model, SUGAR (Supernovae Useful Generator And Reconstructor). We will present the derivation of the model, and discuss the perspectives it opens for supernova standardization.
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Dates et versions

hal-03626456 , version 1 (31-03-2022)

Identifiants

  • HAL Id : hal-03626456 , version 1
  • INSPIRE : 1589759

Citer

E. Gangler, P.-F. Léget. Sugar: When Spectra Help Standardizing Supernovae. 51st Rencontres de Moriond on Cosmology, Mar 2016, La Thuile, Italy. pp.113-116. ⟨hal-03626456⟩
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