Gravitational redshift in the void-galaxy cross-correlation function in redshift space

研究成果: Contribution to journalArticle査読

1 被引用数 (Scopus)

抄録

We construct an analytic model for the void-galaxy cross-correlation function that enables theoretical predictions of the dipole signal produced dominantly by the gravitational redshift within voids for the first time. By extending a theoretical formulation for the redshift-space distortion of galaxies to include the second order terms of the galaxy peculiar velocity v and the gravitational potential, we formulate the void-galaxy cross-correlation function multipoles in the redshift space, the monopole ξ0(s), dipole ξ1(s), and quadrupole ξ2(s). We find that the dipole ξ1(s) is dominated by the gravitational redshift, which provides a unique opportunity to detect the gravitational potential of voids. Thus, for the dipole ξ1(s)(s), the gravitational redshift is crucial. Although the higher order effect is almost negligible on the monopole ξ0(s), it has an influence on the quadrupole ξ2(s). The effects from the random velocity of galaxies and the definition of the void center on the dipole signal are also discussed. Our model offers a new theoretical probe for the detection of gravitational redshift with voids and further tests on cosmology and gravity.

本文言語英語
論文番号043527
ジャーナルPhysical Review D
98
4
DOI
出版ステータス出版済み - 8 15 2018
外部発表はい

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

フィンガープリント 「Gravitational redshift in the void-galaxy cross-correlation function in redshift space」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル