Day 777

Monday.

1410.8769
CFHTLenS: Weak lensing calibrated scaling relations for low mass clusters of galaxies
Kettula et al

Present WL and X-ray analysis of 12 low mass clusters from CFHTLenS and XMM-CFHTLS surveys.  Combine these systems with high-mass systems from CCCP and low mass systems from COSMOS to obtain a sample of 70 systems, which is divided into subsamples of 15 merging and 55 relaxed systems.  Measure L-T, M-L and M-T scaling relations and find in all cases that the power-law slopes of the full, merging and relaxed subsamples are consistent.  For the M-T find slopes consistent with the self-similar model, whereas L-T results in steeper and M-L in flatter relations.  Find a marginal trend for larger scatter and lower normalization in the M-L and M-T relations for the merging subsample, which we attribute to triaxiality and substructure.  Explore the effects of X-ray cross-calibration and find that Chandra calibration leads to flatter L-T and M-T relations.  Also utilize the three surveys making up the sample as overlapping mass bins.  For COSMOS and CFHTLS find slopes consistent with the relation fitted to the full sample, whereas the high mass CCCP sample favors flatter slopes.  Find that intermediate mass systems have a higher mass for their luminosity.  Unfortunately the sample does not enable direct measurement of a break at low masses, but find a trend for enhanced intrinsic scatter in mass at low masses.