Abell2029_Center
We propose XRISM Resolve observations to measure the turbulence and bulk motion of the intracluster medium (ICM) in the outer regions of a relaxed galaxy cluster, Abell 2029. Such non-thermal pressure support causes a bias in cluster masses measured from X-rays under the assumption of hydrostatic equilibrium, and understanding its magnitude has broad implications for cosmological results that use cluster mass scaling relations. These will be the first direct measurements of the kinematic ICM structure outside the cluster core, and they will also confront predictions from numerical simulations that suggest non-thermal pressure support could be substantial here. We will simultaneously obtain Xtend spectral imaging at the virial radius to a depth exceeding existing Suzaku observations.
obsid = 000149000 / Unique Observation/Sequence Number
object = Abell2029_Center / Object name
pi_name = Miller Eric / Proposal Principal Investigator Name
ra = 227.734122739092 / Right Ascension (Pointing Position) (deg)
dec = 5.74518735811894 / Declination (Pointing Position) (deg)
roll_angle = 105.001799466041 / Roll Angle (deg)
start_time = 2024-01-10T03:31:04 / Start Time of the Observation
stop_time = 2024-01-10T16:21:04 / Stop Time of the Observation
exposure = 16323.9375 / Effective Total Observation Exposure (s)
public_date= 2025-08-31 / Public Date