COMA_CENTER
We propose the first direct measurement of the power spectrum of turbulence in the intracluster medium. The spectrum determines the flow of kinetic energy down the turbulent cascade and the amount that dissipates into heat and feeds cosmic ray acceleration and magnetic field amplification. The nearby Coma cluster is the best system for such a measurement, as it does not have a cool core or a powerful AGN, thus all gas motions should be merger-generated and the turbulence should develop in an isotropic, textbook fashion. Our full mosaic of 5 pointings will yield a measurement of the power spectrum normalization and injection scale, a combination that determines the energy flow. Our minimum case is the first detection of turbulence in a merging cluster using the central pointing.
obsid = 300073010 / Unique Observation/Sequence Number
object = COMA_CENTER / Object name
pi_name = Collaboration XRISM / Proposal Principal Investigator Name
ra = 194.943626981816 / Right Ascension (Pointing Position) (deg)
dec = 27.9465325747118 / Declination (Pointing Position) (deg)
roll_angle = 285.843895502649 / Roll Angle (deg)
start_time = 2024-07-09T07:17:04 / Start Time of the Observation
stop_time = 2024-07-18T04:58:04 / Stop Time of the Observation
exposure = 402101.07865101 / Effective Total Observation Exposure (s)
public_date= 2025-08-31 / Public Date