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We report the results of joint Chandra/ACIS - NuSTAR deep observations of NGC1167, the host galaxy of the young radio jet B2 0258+35. In the ACIS data wedetect X-ray emission, extended both along and orthogonal to the jet. At theend of the SE radio jet, we find lower-energy X-ray emission that coincideswith a region of CO turbulence and fast outflow motions. This suggests that thehot Interstellar Medium (ISM) may be compressed by the jet and molecularoutflow, resulting in more efficient cooling. Hydrodynamic simulations ofjet-ISM interaction tailored to NGC 1167 are in agreement with this conclusionand with the overall morphology and spectra of the X-ray emission. The fainthard nuclear source detected with Chandra and the stringent NuSTAR upper limitson the harder X-ray emission show that the active galactic nucleus (AGN) in NGC1167 is in a very low-accretion state. However, the characteristics of theextended X-ray emission are more consonant to those of luminous Compton ThickAGNs, suggesting that we may be observing the remnants of a past high accretionrate episode, with sustained strong activity lasting ~ 2 x 103 yr. We concludethat NGC1167 is presently a LINER, but was an AGN in the past, given theproperties of the extended X-ray emission and their similarity with those of CTAGN extended emission.

Jet-ISM interaction in NGC 1167 / B2 0258+35, A LINER with an AGN past