IRAS_09104+4109
We propose a 250 ks XRISM observation of IRAS 09104+4109 one of two massive cool-core clusters hosting a type 2 QSO in the center. XRISM observations of H1821+643 underlying a quasar in Cycle 1 discovered a high-level turbulent motion of ~300km/s in its cool core. This discovery may indicate that quasar-mode feedback provides sufficient energy to drive turbulent motions of the ICM owing to its strong radiation power including ultra fast outflows (UFOs). This new hypothesis may be the first indication of resolving the cooling-flow problem with XRISM. Observing this target with XRISM is crucial for investigating this new hypothesis, i.e., not only measuring the turbulent motions but also exploring the presence of UFOs. This observation will establish a new face of quasar-mode feedback.
obsid = 202057010 / Unique Observation/Sequence Number
object = IRAS_09104+4109 / Object name
pi_name = UEDA SHUTARO / Proposal Principal Investigator Name
ra = 138.438869671519 / Right Ascension (Pointing Position) (deg)
dec = 40.9422737042067 / Declination (Pointing Position) (deg)
roll_angle = 109.999850764668 / Roll Angle (deg)
start_time = 2025-10-15T14:31:04 / Start Time of the Observation
stop_time = 2025-10-21T17:31:04 / Stop Time of the Observation
exposure = 281189.10507 / Effective Total Observation Exposure (s)
public_date= 2026-11-04 / Public Date