Cen_X-3
Binary evolution is a fundamental ingredient in astronomy. For NS-hosting HMXBs, which are of particular interests for the most plausible NS-NS merger progenitors, the standard binary evolution theory meets some serious challenges. One thing that is not considered well in the standard theory is the non-isotropy of the wind mass loss from the high-mass donor. Doppler tomography is an established method in the optical/UV band for the velocity mapping of a binary system, which can be applied in the X-ray band for the first time by using Resolve. Cen X-3 is the target of choice. The wind velocity field can be mapped using photo-ionized X-ray emission lines. Here, we propose a Resolve observation for one entire orbit (2.1 days) to construct a phase-resolved high-resolution X-ray spectra.
obsid = 300003010 / Unique Observation/Sequence Number
object = Cen_X-3 / Object name
pi_name = Collaboration XRISM / Proposal Principal Investigator Name
ra = 170.312690821294 / Right Ascension (Pointing Position) (deg)
dec = -60.6238905321248 / Declination (Pointing Position) (deg)
roll_angle = 156.799817724664 / Roll Angle (deg)
start_time = 2024-02-12T23:56:04 / Start Time of the Observation
stop_time = 2024-02-15T06:19:04 / Stop Time of the Observation
exposure = 169162.12097906 / Effective Total Observation Exposure (s)
public_date= 2025-08-31 / Public Date