Revisiting the Circumnuclear X-Ray Emission of NGC 2992 in a Historically Low State

Abstract The innermost region of the Seyfert galaxy NGC 2992 has long been suspected to be location intense AGN–host interaction, but photon pile up in previous high-resolution observations hampered study soft X-ray excess and interaction near its nucleus. We present an imaging spectroscopic analysis circumnuclear (1″–3″) using zeroth-order image a 135 ks grating observation obtained with Chandra, which captured nucleus historically low flux state. Extended emission is detected observed luminosity L X ∼ 7 × 10 39 erg s −1 . majority previous, puzzling detection could associated outflow, indicated by morphological correspondences between figure-eight-shaped radio bubbles. An anomalous narrow line centroid energy ∼4.97 keV found. If attributed redshifted highly ionized iron (e.g., Fe xxv ), required outflow velocity ∼0.23 c alternative explanation that this produced nuclear spallation iron. also find extended, asymmetric K α along galactic disk, originate from reflection cold gas on ∼200 pc scale.