XRISM RESOLVE observation 201062010

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Title

UNVEILING EXPLOSION MECHANISM OF TYPE IA SNR G344.7-0.1 BY MEASURING RARE ELEMENTS AND VELOCITY STRUCTURES WITH XRISM

Abstract

Although Type Ia SNe have attracted a great deal of interest, the explosion mechanism is still controversial. So far, two possible scenarios have been put forward: explosion of a white dwarf close to the Chandrasekhar limit (near-Ch) or smaller than the limit (sub-Ch). According to the latest theories, abudances and velocity structures significantly differ between the near-/sub-Ch models. Here we propose a XRISM observation of G344.7-0.1, which is one of the brightest Type Ia SNR. While previous studies suggest detections of Cr and Mn, the measurement is still uncertain and better precision measurements are required. This observation will reveal abundances of rare elements and their velocity structures, both of which are critical to elucidate the explosion mechanism of Type Ia SNe.

FITS header

TELESCOP= 'XRISM   '           / Mission name
INSTRUME= 'RESOLVE '           / Instrument name
FILTER  = 'FE55    '           / Filter name used
OBS_ID  = '201062010'          / Observation identification string
OBJECT  = 'G344.7-0.1'         / Object name
OBSERVER= 'MOE ANAZAWA'        / PI name
OBS_MODE= 'POINTING'           / POINTING or SLEW or ALL
RA_OBJ  =             255.9583 / [deg] Object Right ascension
DEC_OBJ =             -41.7167 / [deg] Object Declination
RA_PNT  =     255.963645166812 / Pointing RA
DEC_PNT =    -41.7164251415892 / Pointing DEC
RA_NOM  =     255.958205470503 / [deg] Nominal aspect point R.A.
DEC_NOM =     -41.716893659028 / [deg] Nominal aspect point Dec.
PA_NOM  =     269.997167399083 / [deg] Nominal aspect point roll.
TELAPSE =      203149.37332499 / Elapsed time
DATE-OBS= '2025-08-28T04:34:00' / Start date
DATE-END= '2025-08-30T12:59:49.373325' / Stop date
ONTIME  =         2445.4133284 / On-source time
EXPOSURE=         2445.4133284 / Exposure time
PROCVER = '03.02.014.010'      / Processing script version
MKFFF   = 'ISAS/JAXA'          / Origin of First FITS file
ORIGIN  = 'GSFC/NASA'          / Origin of Processed FITS file
SOFTVER = 'Hea_12Mar2025_V6.35_XRISM_28Feb2025_V002' / Version of HEADAS used
CALDBVER= 'gen20241115_xtd20241115_rsl20241115' / Version of CALDB used
DATE    = '2025-09-04T12:26:01' / Date and time this file was created or updated
SIB2_VER= 'V04.00  '           / SIB2 version JAXA

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