Alignment of galaxy spins in the vicinity of voids

Details Alignment of galaxy spins in the vicinity of voids Alignment of galaxy spins in the vicinity of voids

2008-11-19

arxiv.org/abs/0811.3216v2

JCAP 0906:009,2009

Astronomy and Astrophysics

Astrophysics

8 pages, 4 figures; v2 discussion expanded, references fixed, matches version accepted by JCAP

Scientific paper

10.1088/1475-7516/2009/06/009

We provide limits on the alignment of galaxy orientations with the direction to the void center for galaxies lying near the edges of voids. We locate spherical voids in volume limited samples of galaxies from the Sloan Digital Sky Survey using the HB inspired void finder and investigate the orientation of (color selected) spiral galaxies that are nearly edge-on or face-on. In contrast with previous literature, we find no statistical evidence for departure from random orientations. Expressed in terms of the parameter c, introduced by Lee & Pen to describe the strength of such an alignment, we find that c<0.11(0.13) at 95% (99.7%) confidence limit within a context of a toy model that assumes a perfectly spherical voids with sharp boundaries.

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