— Luminous tracers have been used extensively to map the large-scale matter distribution in the Universe. Similarly the dynamics of stars or galaxies can be used to estimate masses of galaxies and clusters of galaxies. However, assumptions need to be made about the dynamical state or how well galaxies trace the underlying dark matter distribution. The… CONTINUE READING
Fig. 5. – Multiplicative bias m as a function of signal-to-noise ratio νSN for galaxies with different sizes measured by lensfit from . The solid curves are the result of a fitting function matched to a wide range in size and S/N.