ar X iv : a st ro - p h / 01 11 18 6 v 1 9 N ov 2 00 1 Detection of Galaxy Spin Alignments in the PSCz Shear Field

نویسندگان

  • Jounghun Lee
  • Ue-Li Pen
چکیده

We report the first direct observational evidence for alignment of galaxy spin axes with the local tidal shear field. We measured quantitatively the strength of this directional correlation of disk galaxies in the Tully catalog with the local shear field reconstructed from PSCz galaxies. The observed correlation of galaxy spin orientations with the intrinsic shear field is found to be significant at more than 4σ. Our result is consistent with the linear tidal torque model, and supports the idea that the present galaxy spins may be used as a probe of primordial tidal shear and mass density fields.

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ar X iv : a st ro - p h / 01 11 18 6 v 2 7 F eb 2 00 2 Detection of Galaxy Spin Alignments in the PSCz Shear Field

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تاریخ انتشار 2001