Measuring baryon acoustic oscillations with millions of supernovae

Hu Zhan, Lifan Wang, Philip Pinto, J. Anthony Tyson

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Since Type Ia supernovae (SNe) explode in galaxies, they can, in principle, be used as the same tracer of the large-scale structure as their hosts to measure baryon acoustic oscillations (BAOs). To realize this, one must obtain a dense integrated sampling of SNe over a large fraction of the sky, which may only be achievable photometrically with future projects such as the Large Synoptic Survey Telescope. The advantage of SN BAOs is that SNe have more uniform luminosities and more accurate photometric redshifts than galaxies, but the disadvantage is that they are transitory and hard to obtain in large number at high redshift. We find that a half-sky photometric SN survey to redshift z = 0.8 is able to measure the baryon signature in the SN spatial power spectrum. Although dark energy constraints from SN BAOs are weak, they can significantly improve the results from SN luminosity distances of the same data, and the combination of the two is no longer sensitive to cosmic microwave background priors.

Original languageEnglish (US)
Pages (from-to)L1-L4
JournalAstrophysical Journal
Volume675
Issue number1 PART 2
DOIs
StatePublished - Jan 1 2008

Keywords

  • Cosmological parameters
  • Distance scale
  • Large-scale structure of universe

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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