TAPIR Seminar

Cluster cosmology is critically dependent on our ability to accurately measure the mass of clusters and the calibration of their scaling with survey observables. The discrepancy between studies based on hydrostatic mass estimates and weak-lensing mass estimates is still an outstanding problem.

Here I will present the work on the scaling between X-ray temperature and weak lensing mass of a subsample of the 100 brightest clusters in the XXL survey. Compared to previous studies this sample extends down to lower temperatures ~1keV and spans a wide redshift range 0.05<z<0.6. My study will focuss on the mass dependance of the relation with particular emphasis on the discrepancy with hydrostatic mass scaling relations.