Using host galaxy spectroscopy to explore systematics in the standardization of Type Ia supernovae

DES Collaboration, L. Kelsey, M. Vincenzi

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We use stacked spectra of the host galaxies of photometrically identified Type Ia supernovae (SNe Ia) from the Dark Energy Survey (DES) to search for correlations between Hubble diagram residuals and the spectral properties of the host galaxies. Utilizing full spectrum fitting techniques on stacked spectra binned by Hubble residual, we find no evidence for trends between Hubble residuals and properties of the host galaxies that rely on spectral absorption features (
Original languageEnglish
Pages (from-to)4291-4304
JournalMonthly Notices of the Royal Astronomical Society
Issue number3
Early online date20 Oct 2022
Publication statusPublished - 1 Dec 2022


  • surveys
  • galaxies: general
  • cosmology: observations
  • UKRI
  • STFC

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