Combining Optical and X-ray Observations of Galaxy Clusters to Constrain Cosmological Parameters

Understand

Galaxy clusters have their unique advantages for cosmology.

• Here we collect a new sample of 10 lensing galaxy clusters with X-ray observations to constrain cosmological parameters.The redshifts of lensing clusters lie between 0.1 and 0.6, and the redshift range of their arcs is from 0.4 to 4.9.
• These clusters are selected carefully from strong gravitational lensing systems which have both X-ray satellite observations and optical giant luminous arcs with known redshift.
• Giant arcs usually appear in the central region of clusters, where mass can be traced with luminosity quite well.