Eta_Carinae
A massive mass-loss wind from the evolved supermassive star, eta Carinae, collides with a fast wind from its hidden companion and produces hot plasma at ~50 MK. The X-ray spectra show strong He-like iron K lines from the hot plasma and iron K fluorescence produced by absorption and reemission of the hard X-ray emission at the primary wind. These emission lines should hold crucial information on the shocked gas at the head-on collision, which would flow with a few hundred to thousand km s-1. The star is also surrounded by a ring-shaped diffuse soft X-ray nebula, whose emission lines may show Doppler broadening or shift if the nebula originates from a supernova imposter event in the 1840s. We aim to resolve these emission line features for the first time with XRISM/Resolve.
obsid = 300067010 / Unique Observation/Sequence Number
object = Eta_Carinae / Object name
pi_name = Collaboration XRISM / Proposal Principal Investigator Name
ra = 161.263260104871 / Right Ascension (Pointing Position) (deg)
dec = -59.6843894392188 / Declination (Pointing Position) (deg)
roll_angle = 267.002116850774 / Roll Angle (deg)
start_time = 2024-06-09T00:17:04 / Start Time of the Observation
stop_time = 2024-06-13T08:14:04 / Stop Time of the Observation
exposure = 316703.1146226 / Effective Total Observation Exposure (s)
public_date= 2025-08-31 / Public Date