3C397
Yield of Fe-peak elements (Cr, Mn, Fe, Ni) and Ti in Type Ia supernovae is the critical information for understanding their explosion mechanism. Especially in single degenerate systems where the progenitor mass is near the Chandrasekhar mass limit, mass ratios among Fe-peak elements and Ti are greatly sensitive to the central density of the progenitor. Here we propose a XRISM observation of 3C 397, a remnant of single degenerate Type Ia supernova. Utilizing the extremely high energy resolution of Resolve, we put strong constraint of {Cr,Mn,Ni}/Fe and Ti/Fe. We will observationally probe the central density of the progenitor for the first time.
obsid = 300013020 / Unique Observation/Sequence Number
object = 3C397 / Object name
pi_name = Collaboration XRISM / Proposal Principal Investigator Name
ra = 286.911212513189 / Right Ascension (Pointing Position) (deg)
dec = 7.12974088753406 / Declination (Pointing Position) (deg)
roll_angle = 103.001029372341 / Roll Angle (deg)
start_time = 2024-03-31T02:35:04 / Start Time of the Observation
stop_time = 2024-04-04T04:06:04 / Stop Time of the Observation
exposure = 185886.08450062 / Effective Total Observation Exposure (s)
public_date= 2025-08-31 / Public Date