The Bull's-Eye Effect: Are Galaxy Walls Observationally Enhanced?

Details The Bull's-Eye Effect: Are Galaxy Walls Observationally Enhanced? The Bull's-Eye Effect: Are Galaxy Walls Observationally Enhanced?

1996-08-03

arxiv.org/abs/astro-ph/9608017v2

Astrophys.J. 479 (1997) L15

Astronomy and Astrophysics

Astrophysics

Moderate revisions, including explanation of which effects do and do not contribute to the enhancement. Accepted for publicati

Scientific paper

10.1086/310567

We investigate a distortion in redshift-space which causes galaxies to appear to lie in walls concentric about the observer, forming a rough bull's-eye pattern. We simulate what an observer would see in a thin slice of redshift-space, including a magnitude limit and constant slice angle. The result is an enhanced ring of galaxies encircling the observer at a distance roughly corresponding to the peak of the selection function. This ring is an artificial enhancement of weak features in real-space. This may explain visually prominent features such as the ``Great Wall'' and periodicity found in deep narrow fields.

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