DIRECT VELOCITY MEASUREMENT OF X-RAY EMITTING HOT GAS IN STARBURST-DRIVEN OUTFLOWS IN M82 AND NGC 253 WITH XRISM/RESOLVE
Observational facts that metals in the intergalactic medium are found at low and high redshifts suggest that some part of all metals ever created now reside outside galaxies. Galactic-scale starburst-driven outflows are one of the best-studied and most common form of outflow capable of transporting substantial amount of materials inside galaxies into intergalactic space. To verify the scenario, we propose to observe the most prominent nearby galactic-scale starburst phenomena occurred around the nuclear regions of M82 and NGC253. Resolve observations would realize direct measurements of outflow velocity for X-ray emitting hot gas which is a link between galaxies and intergalactic space and the results would yield new insights in the both chemical and dynamical evolution of the Universe.
TELESCOP= 'XRISM ' / Mission name INSTRUME= 'RESOLVE ' / Instrument name FILTER = 'FE55 ' / Filter name used OBS_ID = '300068010' / Observation identification string OBJECT = 'M82 ' / Object name OBSERVER= 'XRISM Collaboration' / PI name OBS_MODE= 'POINTING' / POINTING or SLEW or ALL RA_OBJ = 148.96967 / [deg] Object Right ascension DEC_OBJ = 69.67939 / [deg] Object Declination RA_PNT = 148.980990131731 / Pointing RA DEC_PNT = 69.6788312015453 / Pointing DEC RA_NOM = 148.969408586503 / [deg] Nominal aspect point R.A. DEC_NOM = 69.6795593355369 / [deg] Nominal aspect point Dec. PA_NOM = 286.833526055109 / [deg] Nominal aspect point roll. TELAPSE = 258662.245011002 / Elapsed time DATE-OBS= '2024-05-12T00:05:56.234375' / Start date DATE-END= '2024-05-14T23:56:58.479386' / Stop date ONTIME = 14553.350376 / On-source time EXPOSURE= 14553.350376 / Exposure time PROCVER = '03.00.013.009' / 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= 'gen20240315_xtd20240815_rsl20240815' / Version of CALDB used DATE = '2024-09-24T13:15:40' / Date and time this file was created or updated SIB2_VER= / SIB2 version JAXA