ABELL3667_CEN_N
XRISM AO1 observations of Abell 3667 revealed a bulk velocity difference across the cold front (CF), indicating the presence of shear flows. The sharpness and longevity of the CF suggest suppression of Kelvin Helmholtz instability, likely due to magnetic tension. To investigate this, we propose XRISM/Resolve follow-up observations targeting two key regions. A 200 ks exposure at the CF outer edge (CF_OUT) aims to measure the shear velocity, enabling a more accurate estimate of the magnetic field strength that stabilizes the CF. A complementary 80 ks observation of the downstream region (Cen_N) will map bulk velocities and turbulent broadening associated with nonlinear KHI development, targeting the same precision in four subregions across the 500 kpc-scale vortex.
obsid = 202072010 / Unique Observation/Sequence Number
object = ABELL3667_CEN_N / Object name
pi_name = OMIYA YUKI / Proposal Principal Investigator Name
ra = 303.106891387089 / Right Ascension (Pointing Position) (deg)
dec = -56.8062157500127 / Declination (Pointing Position) (deg)
roll_angle = 249.996864062875 / Roll Angle (deg)
start_time = 2025-10-13T12:52:04 / Start Time of the Observation
stop_time = 2025-10-15T14:31:04 / Stop Time of the Observation
exposure = 97612.848728 / Effective Total Observation Exposure (s)
public_date= 2026-10-28 / Public Date