| Description |
We present the Strong Lensing Legacy Survey - ARCS (SARCS) sample
compiled from the final T0006 data release of the
Canada-France-Hawaii
Telescope Legacy Survey (CFHTLS). We use a semi-automatic method to
find gravitational arcs. The candidate list is pruned by visual
inspection and ranking to form the SARCS sample.� The SARCS sample
consists of 127 lens candidates which span arc radii~2"-18" within
the
unmasked area of ~ 150 sq. deg. Within the sample, 54 systems are
promising lenses amongst which, we find 12 giant arcs and 2 radial
arc
candidates. Owing to the large area and depth of the CFHTLS, we find
the largest lens sample probing group scales for the first time. We
compare the observed image separation distribution (ISD) of our arcs
with theoretical models. A two-component density profile for the
lenses which accounts for both the central galaxy and dark matter
component is required by the data to explain the observed ISD.
Unfortunately, current levels of uncertainties and degeneracies
accommodate models both with and without adiabatic contraction. We also show the effects of changing parameters of the model that
predict
the ISD and that a larger lens sample might constrain relations such
as the concentration-mass relation, mass-luminosity relation and
slope
of the luminosity function.
|