Catalog of cosmic voids from the SDSS-DR7

We have constructed a complete sample of cosmic voids (devoid of galaxies brighter than M_r_-5log h=-20.17) with radii larger than 10h^-1^Mpc up to redshift 0.12. Disk galaxies in shells around these voids have been used to look for particular alignments between the angular momentum of the galaxies and the radial direction of the voids.

We find that disk galaxies around voids larger than >~15h^-1^Mpc within distances not much larger than 5h^-1^Mpc from the surface of the voids present a significant tendency to have their angular momenta aligned with the void's radial direction with a significance >~98.8% against the null hypothesis. The strength of this alignment is dependent on the void's radius and for voids with a radius >~15h^-1^Mpc the distribution of the orientation of the galaxies is compatible with a random distribution.