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High-redshift cluster weak lensing with Roman and AnaCal-RAIL
Program ID 19093
Science Category Large Scale Structure of the Universe
Program Type Analysis
Category Small
Principal Investigator Anja von der Linden
PI Institution State University of New York, Stony Brook
Co-Investigators
  • Xiangchong Li (Brookhaven National Laboratory)
  • Benjamin Levine (State University of New York, Stony Brook)
  • Prakruth Adari (State University of New York, Stony Brook)
  • Tae-hyeon Shin (Carnegie Mellon University)
  • Tianqing Zhang (Carnegie Mellon University)
  • Christopher Hirata (Ohio State University)
Abstract We propose a pilot program to use the HLWAS Deep and Medium observations to measure weak-lensing cluster masses for 17 SZ-selected clusters over a redshift range of 0.3 < z < 1.3, of which 12 clusters are at z>0.8. This work will chart the path to future, larger-scale analyses to use Roman-based weak-lensing cluster mass estimates in order to calibrate the cluster mass-observable relation for cluster count cosmology at high redshifts (z>0.8). An accurate and precise mass calibration at these redshifts is crucial for cluster cosmology to map the evolution of dark energy. Roman’s capabilities will be transformative for high-redshift cluster weak lensing, which this project will demonstrate.