The Local Cluster Substructure Survey (LoCuSS) aims to measure the
relationship between the structure of galaxy clusters and the
evolution of the hot gas and galaxies that inhabit them. Our main
science goals include the following:
to find out whether/how the shape, normalization and scatter of
the cluster mass-observable scaling relations depend on the dynamical
state of clusters;
to characterize the systematic uncertainties in dark energy
experiments that rely on counting galaxy clusters as a function of
mass and redshift;
to probe the astrophysics of galaxy cluster assembly, e.g.
whether/how cluster assembly modifies the cooling of intracluster gas in
to measure and understand physically the cluster-to-cluster
scatter in obscured, unobscured and recently quenched star formation
to build a large sample of well-characterized gravitational
telescopes with which to search for the sources responsible for
The core of Abell
383, imaged by the Hubble Space Telescope as part of the LoCuSS pilot
study. More images are available here.
We are using gravitational lensing data from the Hubble Space Telescope and Subaru Telescope to map the distribution
of dark matter in the clusters. These data are complemented by extensive
observations at X-ray, ultraviolet, optical, infrared and radio
wavelengths. More information about these observations is available here.
LoCuSS was originally motivated by the results published in Smith et al.,
Images from this "pilot study" of 10 clusters are available here.
In LoCuSS itself we aim to observe an all-sky sample of 100 massive galaxy
clusters at 0.15<=z<=0.3 drawn from the REFLEX and (e)BCS samples. Further
technical details of the survey can be found in our publications.
Please contact us if you would like to
know more about our survey.