XRISM RESOLVE observation 201015010

Title

ABELL 754: CAPTURING THE HYDRODYNAMIC MOTION PERPENDICULAR TO THE MERGER AXIS

Abstract

We propose two-pointing deep observations for a sloshing main gas halo (100 ksec) and a subhalo on the verge of destruction (200ksec) in a nearby violent merger, Abell 754, of which the merger axis is almost aligned on the sky plane. Edge-on observation allows us to separate hydrodynamic motion perpendicular to the merger axis from the merger-induced inflow motion. The perpendicular motion acting on disrupting gas halos is only induced in the gas by its collisional nature. Our observation will reveal mixing and incorporating processes of the gas, that is, a scene of hierarchical structure formation. Together with merger parameters derived from weak-lensing mass distribution from Subaru/HSC and galaxy dynamics, a direct measurement of the gas motion and X-ray thermodynamics give us a compr

FITS header

TELESCOP= 'XRISM   '           / Mission name
INSTRUME= 'RESOLVE '           / Instrument name
FILTER  = 'FE55    '           / Filter name used
OBS_ID  = '201015010'          / Observation identification string
OBJECT  = 'ABELL754_MAIN'      / Object name
OBSERVER= 'NOBUHIRO OKABE'     / PI name
OBS_MODE= 'POINTING'           / POINTING or SLEW or ALL
RA_OBJ  =             137.3326 / [deg] Object Right ascension
DEC_OBJ =              -9.6887 / [deg] Object Declination
RA_PNT  =     137.327799979245 / Pointing RA
DEC_PNT =    -9.68682719226038 / Pointing DEC
RA_NOM  =     137.331804145264 / [deg] Nominal aspect point R.A.
DEC_NOM =    -9.68788892068503 / [deg] Nominal aspect point Dec.
PA_NOM  =     111.632758592845 / [deg] Nominal aspect point roll.
TELAPSE =        215636.765625 / Elapsed time
DATE-OBS= '2024-11-20T07:49:24.234375' / Start date
DATE-END= '2024-11-22T19:43:21' / Stop date
ONTIME  =         5422.8348922 / On-source time
EXPOSURE=         5422.8348922 / 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    = '2024-12-02T03:26:15' / Date and time this file was created or updated
SIB2_VER= 'V03.01  '           / SIB2 version JAXA

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