Large-scale structure and the redshift-distance relation

Details Large-scale structure and the redshift-distance relation Large-scale structure and the redshift-distance relation

1998-04-21

arxiv.org/abs/astro-ph/9804213v1

Astronomy and Astrophysics

Astrophysics

11 pages (AASTeX), 4 figures, to appear in the Astrophysical Journal Letters

Scientific paper

10.1086/311399

In efforts to demonstrate the linear Hubble law v = Hr from galaxy observations, the underlying simplicity is often obscured by complexities arising from magnitude-limited data. In this paper we point out a simple but previously unremarked fact: that the shapes and orientations of structures in redshift space contain in themselves independent information about the cosmological redshift-distance relation. The orientations of voids in the CfA slice support the Hubble law, giving a redshift-distance power index p = 0.83 +/- 0.36 (void data from Slezak, de Lapparent, & Bijoui 1993) or p = 0.99 +/- 0.38 (void data from Malik & Subramanian 1997).

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