Dark energy reflections in the redshift-space quadrupole

Kazuhiro Yamamoto, Bruce A. Bassett, Hiroaki Nishioka

研究成果: Contribution to journalArticle査読

22 被引用数 (Scopus)


We show that the redshift-space quadrupole will be a powerful tool for constraining dark energy even if the baryon oscillations are missing from the monopole power spectrum and bias is scale and time dependent. We calculate the accuracy with which next-generation galaxy surveys such as KAOS will measure the quadrupole power spectrum, which gives the leading anisotropies in the power spectrum in redshift space due to linear velocity, and the so-called "Finger of God" and Alcock-Paczynski effects. Combining the monopole and quadrupole power spectra, in the complete absence of baryon oscillations (Ωb = 0), leads to a roughly 500% improvement in constraints on dark energy compared with those from the monopole spectrum alone.

ジャーナルPhysical review letters
出版ステータス出版済み - 2 11 2005

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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