The BAHAMAS project: the CMB--large-scale structure tension and the roles of massive neutrinos and galaxy formation

no code implementations • 6 Dec 2017 • Ian G. McCarthy, Simeon Bird, Joop Schaye, Joachim Harnois-Deraps, Andreea S. Font, Ludovic van Waerbeke

Recent studies have presented evidence for tension between the constraints on Omega_m and sigma_8 from the cosmic microwave background (CMB) and measurements of large-scale structure (LSS).

Cosmology and Nongalactic Astrophysics

CFHTLenS revisited: assessing concordance with Planck including astrophysical systematics

1 code implementation • 21 Jan 2016 • Shahab Joudaki, Chris Blake, Catherine Heymans, Ami Choi, Joachim Harnois-Deraps, Hendrik Hildebrandt, Benjamin Joachimi, Andrew Johnson, Alexander Mead, David Parkinson, Massimo Viola, Ludovic van Waerbeke

When the systematic uncertainties are considered independently, the intrinsic alignment amplitude is the only degree of freedom that is substantially preferred by the data.

Cosmology and Nongalactic Astrophysics

CFHTLenS: A Weak Lensing Shear Analysis of the 3D-Matched-Filter Galaxy Clusters

1 code implementation • 11 Sep 2014 • Jes Ford, Ludovic van Waerbeke, Martha Milkeraitis, Clotilde Laigle, Hendrik Hildebrandt, Thomas Erben, Catherine Heymans, Henk Hoekstra, Thomas Kitching, Yannick Mellier, Lance Miller, Ami Choi, Jean Coupon, Liping Fu, Michael J. Hudson, Konrad Kuijken, Naomi Robertson, Barnaby Rowe, Tim Schrabback, Malin Velander

We present the cluster mass-richness scaling relation calibrated by a weak lensing analysis of >18000 galaxy cluster candidates in the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS).

Cosmology and Nongalactic Astrophysics

Cluster Magnification & the Mass-Richness Relation in CFHTLenS

1 code implementation • 8 Oct 2013 • Jes Ford, Hendrik Hildebrandt, Ludovic van Waerbeke, Thomas Erben, Clotilde Laigle, Martha Milkeraitis, Christopher Morrison

Gravitational lensing magnification is measured with a significance of 9. 7 sigma on a large sample of galaxy clusters in the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS).

Cosmology and Nongalactic Astrophysics

The Stability of the Point Spread Function of the Advanced Camera for Surveys on the Hubble Space Telescope and Implications for Weak Gravitational Lensing

no code implementations • 6 Feb 2007 • Jason D. Rhodes, Richard Massey, Justin Albert, Nicholas Collins, Richard S. Ellis, Catherine Heymans, Jonathan P. Gardner, Jean-Paul Kneib, Anton Koekemoer, Alexie Leauthaud, Yannick Mellier, Alexandre Refregier, James E. Taylor, Ludovic van Waerbeke

We derive a parametric correction for the effect of CTE on the shapes of objects in the COSMOS field as a function of observation date, position within the ACS WFC field, and object flux.