KiDS-450: Weak lensing shear measurements Virtual Observatory Resource

Authors
  1. Hildebrandt H.
  2. Viola M.
  3. Heymans C.
  4. Joudaki S.
  5. Kuijken K.
  6. Blake C.,Erben T.
  7. Joachimi B.
  8. Klaes D.
  9. Miller L.
  10. Morrison C.B.
  11. Nakajima R.,Verdoes Kleijn G.
  12. Amon A.
  13. Choi A.
  14. Covone G.
  15. de Jong J.T.A.
  16. Dvornik A.,Fenech Conti I.
  17. Grado A.
  18. Harnois-Deraps J.
  19. Herbonnet R.
  20. Hoekstra H.,Kohlinger F.
  21. McFarland J.
  22. Mead A.
  23. Merten J.
  24. Napolitano N.
  25. Peacock J.A.,Radovich M.
  26. Schneider P.
  27. Simon P.
  28. Valentijn E.A.
  29. van den Busch J.L.,van Uitert E.
  30. van Waerbeke L.
  31. Published by
    CDS
Abstract

We present cosmological parameter constraints from a tomographic weak gravitational lensing analysis of ~450deg^2^ of imaging data from the Kilo Degree Survey (KiDS). For a flat {Lambda} cold dark matter ({Lambda}CDM) cosmology with a prior on H_0_ that encompasses the most recent direct measurements, we find S_8_={sigma}_8_({Omega}_m_/0.3)^0.5^=0.745+/-0.039. This result is in good agreement with other low-redshift probes of large-scale structure, including recent cosmic shear results, along with pre-Planck cosmic microwave background constraints. A 2.3{sigma} tension in S8 and "substantial discordance" in the full parameter space is found with respect to the Planck 2015 results. We use shear measurements for nearly 15 million galaxies, determined with a new improved "self-calibrating" version of lensfit validated using an extensive suite of image simulations. Four-band ugri photometric redshifts are calibrated directly with deep spectroscopic surveys. The redshift calibration is confirmed using two independent techniques based on angular cross-correlations and the properties of the photometric redshift probability distributions. Our covariance matrix is determined using an analytical approach, verified numerically with large mock galaxy catalogues. We account for uncertainties in the modelling of intrinsic galaxy alignments and the impact of baryon feedback on the shape of the non-linear matter power spectrum, in addition to the small residual uncertainties in the shear and redshift calibration. The cosmology analysis was performed blind. Our high-level data products, including shear correlation functions, covariance matrices, redshift distributions, and Monte Carlo Markov chains are available at http://kids.strw.leidenuniv.nl/

Keywords
  1. infrared-photometry
  2. visible-astronomy
  3. broad-band-photometry
  4. galaxies
  5. catalogs
  6. redshifted
  7. gravitational-lensing
Bibliographic source Bibcode
2017MNRAS.465.1454H
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/II/384
IVOA Identifier IVOID
ivo://CDS.VizieR/II/384

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=II/384
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=II/384
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=II/384
IVOA Table Access TAP
https://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/II/384/kids_shear?
https://vizier.iucaa.in/viz-bin/conesearch/II/384/kids_shear?
http://vizieridia.saao.ac.za/viz-bin/conesearch/II/384/kids_shear?

History

2025-04-04T14:03:28Z
Resource record created
2025-04-04T14:03:28Z
Created
2025-06-02T07:05:25Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr