Weak lensing measurements of dark matter halos of galaxies from COMBO-17
- M. Kleinheinrich
- P. Schneider
- H.-W. Rix
- T. Erben
- C. Wolf
- M. Schirmer
- K. Meisenheimer
- A. Borch
- S. Dye
- Z. Kovacs
- L. Wisotzki
DOIAbstract
We present mass estimates for dark matter halos around galaxies from the COMBO-17 survey using weak gravitational lensing. COMBO-17, with photometry in 17 optical filters, provides precise photometric redshifts and spectral classification for objects with $R<24$. This permits to select and sort lens and source galaxies by their redshifts and lens luminosity or color, which bypasses many uncertainties in other weak lensing analyses arising from broadly estimated source and lens redshifts. We study the shear created by dark matter halos around 12 000 galaxy lenses at redshifts $z_\mathrm{d}=0.2{-}0.7$ by fitting the mass normalization of either singular isothermal spheres (SIS) or Navarro-Frenk-White (NFW) profiles to background ...
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