XRISM maps iron emission zones around Cygnus A's black hole

A 170 ks observation with XRISM Resolve separates the 6.4 keV iron K-alpha line in the radio galaxy Cygnus A into a broad component (velocity dispersion ~3400 km/s) originating near the broad-line region at 0.1–0.17 pc, and a narrow component (~440 km/s) tracing the molecular torus at 6–10 pc. A third, nearly unresolved line hints at gas at the torus outer edge or narrow-line region. A redshift in the Fe K absorption edge suggests bulk inflow at ~470 km/s, possibly from an infalling wind or a rotating torus with asymmetric near/far-side contributions.