Probing the Dark Flow Signal in WMAP 9 -Year and Planck Cosmic Microwave Background Maps

  title={Probing the Dark Flow Signal in WMAP 9 -Year and Planck Cosmic Microwave Background Maps},
  author={Fernando Atrio-Barandela and A. Kashlinsky and Harald Ebeling and Dale J. Fixsen and Dale D. Kocevski},
  journal={The Astrophysical Journal},
The "dark flow" dipole is a statistically significant dipole found at the position of galaxy clusters in filtered maps of Cosmic Microwave Background (CMB) temperature anisotropies. The dipole measured in WMAP 3-, 5-, and 7- year data releases was (1) mutually consistent, (2) roughly aligned with the all-sky CMB dipole, and (3) correlated with clusters' X-ray luminosities. We analyzed WMAP 9 -year and Planck 1st- year data releases using a catalog of 980 clusters outside of the Kp0 mask to test… Expand
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