A new measure of σ8 using the lensing dispersion in high-z type Ia supernovae

Takashi Hamana, Toshifumi Futamase

研究成果: Article

17 引用 (Scopus)


The gravitational lensing magnification or demagnification due to large-scale structures induces a scatter in peak magnitudes of high-redshift Type Ia supernovae (SNe Ia). The amplitude of the lensing dispersion strongly depends on that of density fluctuations characterized by the σ8 parameter. Therefore the value of σ8 is constrained by measuring the dispersion in the peak magnitudes. We examine how well SN Ia data will provide a constraint on the value of σ8 using a likelihood analysis method. It is found that the number and quality of SN Ia data needed for placing a useful constraint on σ8 is attain-able with the Next Generation Space Telescope.

ジャーナルAstrophysical Journal
発行部数1 PART 1
出版物ステータスPublished - 2000 5 1

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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