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The Dark Matter filament between Abell 222/223*

  • Jörg P. Dietrich (a1), Norbert Werner (a2), Douglas Clowe (a3), Alexis Finoguenov (a4), Tom Kitching (a5), Lance Miller (a6) and Aurora Simionescu (a2)...
  • Please note a correction has been issued for this article.

Abstract

Weak lensing detections and measurements of filaments have been elusive for a long time. The reason is that the low density contrast of filaments generally pushes the weak lensing signal to unobservably low scales. To nevertheless map the dark matter in filaments exquisite data and unusual systems are necessary. SuprimeCam observations of the supercluster system Abell 222/223 provided the required combination of excellent seeing images and a fortuitous alignment of the filament with the line-of-sight. This boosted the lensing signal to a detectable level and led to the first weak lensing mass measurement of a large-scale structure filament. The filament connecting Abell 222 and Abell 223 is now the only one traced by the galaxy distribution, dark matter, and X-ray emission from the hottest phase of the warm-hot intergalactic medium. The combination of these data allows us to put the first constraints on the hot gas fraction in filaments.

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References

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The Dark Matter filament between Abell 222/223*

  • Jörg P. Dietrich (a1), Norbert Werner (a2), Douglas Clowe (a3), Alexis Finoguenov (a4), Tom Kitching (a5), Lance Miller (a6) and Aurora Simionescu (a2)...
  • Please note a correction has been issued for this article.

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