[Normal Galaxies, Clusters of Galaxies -- Oral ]
Weighing the giants: X-ray and weak lensing studies measurements
of the most massive clusters
Anja von der Linden, KIPAC/Stanford
Doug Applegate (KIPAC), Pat Kelly (KIPAC), Mark Allen (KIPAC), Steve Allen (KIPAC), Harald Ebeling (U Hawaii), Adam Mantz (KIPAC)
Chandra is a key instrument to understand the physics and
evolution of galaxy clusters. But the combination with other high-quality,
multi-wavelength observations is arguably even more powerful. We are
conducting a multi-wavelength follow-up survey of ~30 of the most
massive clusters known at z=0.3-0.6, selected from the MAssive Clusters
Survey (MACS). Our follow-up data consists of Chandra X-ray imaging,
deep multi-color imaging from SuprimeCam and HST imaging. The weak
lensing mass measurements derived from the optical imaging will be a
vital ingredient to determine the non-thermal pressure component in
clusters, and thus to calibrate them as cosmological probes. At the same
time, the multi-wavelength data allows us to study intriguing clusters
in more detail, e.g. to study the physics of merging clusters. I will
present our first results, and highlight some of the most intriguing
clusters, such as the cousin of the Bullet Cluster, MACSJ0025.4-1222.