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Title:
Galaxy Zoo: the large-scale spin statistics of spiral galaxies in the Sloan Digital Sky Survey
Authors:
Land, Kate; Slosar, Anže; Lintott, Chris; Andreescu, Dan; Bamford, Steven; Murray, Phil; Nichol, Robert; Raddick, M. Jordan; Schawinski, Kevin; Szalay, Alex; Thomas, Daniel; Vandenberg, Jan
Affiliation:
AA(Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH), AB(Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH; Berkeley Center for Cosmological Physics, Lawrence Berkeley National Laboratory and Physics Department, University of California, Berkeley CA 94720, USA), AC(Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH), AD(LinkLab, 4506 Graystone Ave., Bronx NY 10471, USA), AE(ICG, University of Portsmouth, Mercantile House, Hampshire Terrace, Portsmouth PO1 2EG), AF(Fingerprint Digital Media, 9 Victoria Close, Newtownards, Co. Down BT23 7GY), AG(ICG, University of Portsmouth, Mercantile House, Hampshire Terrace, Portsmouth PO1 2EG), AH(Department of Physics and Astronomy, The Johns Hopkins University, Homewood Campus, Baltimore MD 21218, USA), AI(Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH), AJ(Department of Physics and Astronomy, The Johns Hopkins University, Homewood Campus, Baltimore MD 21218, USA), AK(ICG, University of Portsmouth, Mercantile House, Hampshire Terrace, Portsmouth PO1 2EG), AL(Department of Physics and Astronomy, The Johns Hopkins University, Homewood Campus, Baltimore MD 21218, USA)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 388, Issue 4, pp. 1686-1692. (MNRAS Homepage)
Publication Date:
08/2008
Origin:
MNRAS
Astronomy Keywords:
galaxies: spiral , large-scale structure of Universe
DOI:
10.1111/j.1365-2966.2008.13490.x
Bibliographic Code:
2008MNRAS.388.1686L

Abstract

We re-examine the evidence for a violation of large-scale statistical isotropy in the distribution of projected spin vectors of spiral galaxies. We have a sample of ~37000 spiral galaxies from the Sloan Digital Sky Survey, with their line of sight spin direction confidently classified by members of the public through the online project Galaxy Zoo. After establishing and correcting for a certain level of bias in our handedness results we find the winding sense of the galaxies to be consistent with statistical isotropy. In particular, we find no significant dipole signal, and thus no evidence for overall preferred handedness of the Universe. We compare this result to those of other authors and conclude that these may also be affected and explained by a bias effect.

This publication has been made possible by the participation of more than 100000 volunteers in the Galaxy Zoo project: http://www.galaxyzoo.org/Volunteers.aspx.

E-mail: krl@astro.ox.ac.uk (KL); anze@berkeley.edu (AS)


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