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Ludovic Van Waerbeke Department of Physics and Astronomy University of British Columbia Statistical lensing in COSMOS With: F. Bernardeau (CEA) Y. Mellier (IAP) E. Semboloni (IAP) & the COSMOS team

Ludovic Van Waerbeke Department of Physics and Astronomy University of British Columbia Statistical lensing in COSMOS With: F. Bernardeau (CEA) Y. Mellier

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Page 1: Ludovic Van Waerbeke Department of Physics and Astronomy University of British Columbia Statistical lensing in COSMOS With: F. Bernardeau (CEA) Y. Mellier

Ludovic Van WaerbekeDepartment of Physics and Astronomy

University of British Columbia

Statistical lensing in COSMOS

With:

F. Bernardeau (CEA)Y. Mellier (IAP)E. Semboloni (IAP)& the COSMOS team

Page 2: Ludovic Van Waerbeke Department of Physics and Astronomy University of British Columbia Statistical lensing in COSMOS With: F. Bernardeau (CEA) Y. Mellier

Weak lensing two-points Weak lensing two-points statistics: What is measured?statistics: What is measured?

Mass power spectrum Mass power spectrum normalisationnormalisation

Slope of the power spectrumSlope of the power spectrum

Mean density parameterMean density parameter

Redshift of the sourcesRedshift of the sources

<<>>~~zzss

1.4 1.4 -(-(nn+2)/2+2)/2

Contaldi et al. 2004

Page 3: Ludovic Van Waerbeke Department of Physics and Astronomy University of British Columbia Statistical lensing in COSMOS With: F. Bernardeau (CEA) Y. Mellier

VIRMOSI~24Z~0.9LVW et al.

COSMOS should reach ~ same accuracy with two major differences:-followups. In particular photoz enables lenses selection, 3D lensing, etc…-morphology-depth enables high order statistics despite small FOV.

Page 4: Ludovic Van Waerbeke Department of Physics and Astronomy University of British Columbia Statistical lensing in COSMOS With: F. Bernardeau (CEA) Y. Mellier

redshift distributions based on the Hubble deep fields

25.<i<27.Zphot~1.4

Page 5: Ludovic Van Waerbeke Department of Physics and Astronomy University of British Columbia Statistical lensing in COSMOS With: F. Bernardeau (CEA) Y. Mellier

Cycle 12 area Polygon masks (ds9 format) are available

Page 6: Ludovic Van Waerbeke Department of Physics and Astronomy University of British Columbia Statistical lensing in COSMOS With: F. Bernardeau (CEA) Y. Mellier

PSF anisotropy pattern averaged over cycle 12 chips

Page 7: Ludovic Van Waerbeke Department of Physics and Astronomy University of British Columbia Statistical lensing in COSMOS With: F. Bernardeau (CEA) Y. Mellier

Preliminary E and B modes aperture mass

Page 8: Ludovic Van Waerbeke Department of Physics and Astronomy University of British Columbia Statistical lensing in COSMOS With: F. Bernardeau (CEA) Y. Mellier

LCDM model with 8=0.8 and zS~1.4

Page 9: Ludovic Van Waerbeke Department of Physics and Astronomy University of British Columbia Statistical lensing in COSMOS With: F. Bernardeau (CEA) Y. Mellier

~30 stars per chip

Page 10: Ludovic Van Waerbeke Department of Physics and Astronomy University of British Columbia Statistical lensing in COSMOS With: F. Bernardeau (CEA) Y. Mellier

Needs image reprocessing with smaller pixel size?

Page 11: Ludovic Van Waerbeke Department of Physics and Astronomy University of British Columbia Statistical lensing in COSMOS With: F. Bernardeau (CEA) Y. Mellier

Star-gal shear aperture correlation

Page 12: Ludovic Van Waerbeke Department of Physics and Astronomy University of British Columbia Statistical lensing in COSMOS With: F. Bernardeau (CEA) Y. Mellier

Star-gal shear correlation function

Page 13: Ludovic Van Waerbeke Department of Physics and Astronomy University of British Columbia Statistical lensing in COSMOS With: F. Bernardeau (CEA) Y. Mellier

Strong lensing with R. Gavazzi (OMP, Toulouse)

Page 14: Ludovic Van Waerbeke Department of Physics and Astronomy University of British Columbia Statistical lensing in COSMOS With: F. Bernardeau (CEA) Y. Mellier
Page 15: Ludovic Van Waerbeke Department of Physics and Astronomy University of British Columbia Statistical lensing in COSMOS With: F. Bernardeau (CEA) Y. Mellier
Page 16: Ludovic Van Waerbeke Department of Physics and Astronomy University of British Columbia Statistical lensing in COSMOS With: F. Bernardeau (CEA) Y. Mellier
Page 17: Ludovic Van Waerbeke Department of Physics and Astronomy University of British Columbia Statistical lensing in COSMOS With: F. Bernardeau (CEA) Y. Mellier

Singular ISZlens~0.4Zsource~3Re=1.58”

M~4.4x1011 Mo h70-1

Inverse pixel mapping into the source plane