Quantifying the statistics of CMB-lensing-derived galaxy cluster mass measurements with simulations
arXiv:2005.14607 · doi:10.1093/mnras/staa2302
Abstract
CMB lensing is a promising, novel way to measure galaxy cluster masses that can be used, e.g., for mass calibration in galaxy cluster counts analyses. Understanding the statistics of the galaxy cluster mass observable obtained with such measurements is essential if their use in subsequent analyses is not to lead to biased results. We study the statistics of a CMB lensing galaxy cluster mass observable for a Planck-like experiment with mock observations obtained from an N-body simulation. We quantify the bias and intrinsic scatter associated with this observable following two different approaches, one in which the signal due to the cluster and nearby correlated large-scale structure is isolated, and another one in which the variation due to uncorrelated large-scale structure is also taken into account. For our first approach we also quantify deviations from log-normality in the scatter, finding them to have a negligible impact on mass calibration for our Planck-like experiment. We briefly discuss how some of our results change for experiments with higher angular resolution and lower noise levels, such as the current generation of surveys obtained with ground-based, large-aperture telescopes.
References in corpus (13)
- The Canadian Cluster Comparison Project: detailed study of systematics and updated weak lensing masses
- A universal model for halo concentrations
- CMB-S4 Science Book, First Edition
- The galaxy cluster mass scale and its impact on cosmological constraints from the cluster population
- Full-sky Gravitational Lensing Simulation for Large-area Galaxy Surveys and Cosmic Microwave Background Experiments
- CMB temperature lensing power reconstruction
- The redshift evolution of massive galaxy clusters in the MACSIS simulations
- Pressure of the hot gas in simulations of galaxy clusters
- Evidence of Lensing of the Cosmic Microwave Background by Dark Matter Halos
- A Measurement of Gravitational Lensing of the Cosmic Microwave Background by Galaxy Clusters Using Data from the South Pole Telescope
- Measuring cluster masses with CMB lensing: a statistical approach
- Calibrating Cluster Number Counts with CMB lensing
- Improved estimation of cluster mass profiles from the cosmic microwave background