UNVEILING THE ASYMMETRIC EJECTA ORIGIN AND AMBIENT MEDIUM INTERACTION IN TYCHO'S SNR
We propose a 100 ks observation to study the unique northeast region with complementary goals: understand the origin of the large-scale velocity asymmetry in the line-of-sight, where the northeast region is observed to be predominantly blue-shifted, constrain the explosion mechanism and environment of a Type Ia progenitor, constrain the ion temperatures, and probe the interaction with the neutral ambient medium in this region observed in Halpha optical emission. For that, we will resolve the line complex, measure temperatures, non-equilibrium ionization times and abundances, determine line shifts and broadenings of individual element from Si to the iron K line, search for rare element lines and charge exchange lines due to interaction with the neutral ambient medium.
TELESCOP= 'XRISM ' / Mission name INSTRUME= 'XTEND ' / Instrument name OBS_ID = '201118010' / Observation identification string OBJECT = 'TYCHO_NE' / Object name OBSERVER= 'ANNE DECOURCHELLE' / PI name OBS_MODE= 'POINTING' / POINTING or SLEW or ALL RA_OBJ = 6.4079 / [deg] Object Right ascension DEC_OBJ = 64.1709 / [deg] Object Declination RA_PNT = 6.41877765973504 / Pointing RA DEC_PNT = 64.1565641156201 / Pointing DEC RA_NOM = 6.40798432675688 / [deg] Nominal aspect point R.A. DEC_NOM = 64.1704087831991 / [deg] Nominal aspect point Dec. PA_NOM = 4.89326370731804 / [deg] Nominal aspect point roll. TELAPSE = 184142.963135988 / Elapsed time DATE-OBS= '2024-09-23T09:27:47.036864' / Start date DATE-END= '2024-09-25T12:36:50' / Stop date ONTIME = 148210.61771 / On-source time EXPOSURE= 148210.61771 / 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 = '2024-10-02T09:21:51' / Date and time this file was created or updated SIB2_VER= 'V03.01 ' / SIB2 version JAXA