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

Takashi Hamana, Toshifumi Futamase

研究成果: Article査読

18 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)29-33
ページ数5
ジャーナルAstrophysical Journal
534
1 PART 1
DOI
出版ステータスPublished - 2000 5月 1
外部発表はい

ASJC Scopus subject areas

  • 天文学と天体物理学
  • 宇宙惑星科学

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