UNVEILING THE DYNAMICS AND CHEMICAL ENRICHMENT OF THE OPHIUCHUS GALAXY CLUSTER WITH XRISM
The Ophiuchus cluster, the second brightest X-ray source, provides a unique study of an exceptionally hot (9keV) cluster. Despite high temperatures indicating merger disruption, it has retained its cool core. Previous observations conflict on the internal gas velocity in the core, ranging from <100 to >2000km/s. We will use the spectral resolution of XRISM to precisely measure the velocity, resolve the discrepancy, and reveal the core destruction processes. The obtained velocity will allow the estimation of instability timescales that drive core evolution. We will also study elemental abundances to see if the population of supernovae differs from cooler clusters. This multi-pronged approach will provide insights into the formation and evolution of this extraordinary cluster.
TELESCOP= 'XRISM ' / Mission name INSTRUME= 'XTEND ' / Instrument name OBS_ID = '201006010' / Observation identification string OBJECT = 'OPHIUCHUS_CLUSTER' / Object name OBSERVER= 'YUTAKA FUJITA' / PI name OBS_MODE= 'POINTING' / POINTING or SLEW or ALL RA_OBJ = 258.1154 / [deg] Object Right ascension DEC_OBJ = -23.3687 / [deg] Object Declination RA_PNT = 258.112034773536 / Pointing RA DEC_PNT = -23.3704779001803 / Pointing DEC RA_NOM = 258.114002197688 / [deg] Nominal aspect point R.A. DEC_NOM = -23.3686496138755 / [deg] Nominal aspect point Dec. PA_NOM = 94.8431268734683 / [deg] Nominal aspect point roll. TELAPSE = 478606 / Elapsed time DATE-OBS= '2025-03-31T22:51:50' / Start date DATE-END= '2025-04-06T11:48:36' / Stop date ONTIME = 188843.83531 / On-source time EXPOSURE= 188843.83531 / Exposure time PROCVER = '03.00.013.010' / Processing script version MKFFF = 'ISAS/JAXA' / Origin of First FITS file ORIGIN = 'GSFC/NASA' / Origin of Processed FITS file SOFTVER = 'Hea_21Aug2024_V6.34_XRISM_21Aug2024_V001' / Version of HEADAS used CALDBVER= 'gen20241115_xtd20241115_rsl20241115' / Version of CALDB used DATE = '2025-04-12T12:32:54' / Date and time this file was created or updated SIB2_VER= 'V03.01 ' / SIB2 version JAXA