HERCULES_A
Existing Hitomi and XRISM studies of low/intermediate-power AGN in relaxed clusters show modest ICM turbulence (~165 km/s). Whether this holds at the highest feedback levels-contrary to expectations-remains unknown. We propose Resolve observations of the iconic Hercules A, a powerful radio galaxy with 200 kpc jets driving a huge cocoon shock in the ICM. With a jet power of 2x10^46 erg/s, Hercules A far exceeds systems like Hydra A or Perseus, probing unexplored AGN feedback regimes. Our observations will detect velocity dispersion excesses as low as 30 km/s (~200 km/s) at >99.7% significance, testing if powerful outbursts drive stronger turbulence. A single Resolve pointing will also probe condensation models, lobe-gas interactions, and ICM microphysics, maximizing XRISM science return.
obsid = 202094010 / Unique Observation/Sequence Number
object = HERCULES_A / Object name
pi_name = UBERTOSI FRANCESCO / Proposal Principal Investigator Name
ra = 252.782735242755 / Right Ascension (Pointing Position) (deg)
dec = 4.99302175385797 / Declination (Pointing Position) (deg)
roll_angle = 90.0022604590257 / Roll Angle (deg)
start_time = 2026-03-26T11:01:04 / Start Time of the Observation
stop_time = 2026-03-31T01:38:04 / Stop Time of the Observation
exposure = 219214.97095 / Effective Total Observation Exposure (s)
public_date= 2027-04-09 / Public Date