NGC7172
We propose to observe NGC 7172, the best-studied new type AGN (low scattering-fraction AGN) showing the brightest Fe K line, to unveil the nuclear structure. New type AGNs were recognized in 2007 as a putative population of deeply buried supermassive black holes. Despite their importance to understand the process of galaxy-black hole coevolution, their nature still remains unsolved. ALMA observations suggest that NGC 7172 is in the AGN feedback phase, where dense outflow in the innermost region of the torus obscures the nucleus. With XRISM we will measure the width and blue shifts of the Fe-K line with unprecedented accuracies. This is a crucial step to confirm the scenario that new type AGNs are in the outflow-dominant phase in a late stage of an AGN event.
obsid = 202074010 / Unique Observation/Sequence Number
object = NGC7172 / Object name
pi_name = UEDA YOSHIHIRO / Proposal Principal Investigator Name
ra = 330.507216563507 / Right Ascension (Pointing Position) (deg)
dec = -31.8704852802092 / Declination (Pointing Position) (deg)
roll_angle = 247.994327935682 / Roll Angle (deg)
start_time = 2025-10-21T17:31:04 / Start Time of the Observation
stop_time = 2025-10-27T06:11:04 / Stop Time of the Observation
exposure = 215347.02904 / Effective Total Observation Exposure (s)
public_date= 2026-11-04 / Public Date