Abstract:
Supermassive black holes in galaxies spend majority of their lifetime in the low-luminosity regime, powered by hot accretion flow. Direct observational evidence for energetic hot winds launched from such hot accretion flow can be detected through doppler shift of highly ionized iron emission lines in two prototypical low-luminosity AGNs M81* and NGC 7213. In this talk, I will further discuss about the identification of additional outflowing components detected in soft X-ray bands from the two LLAGNs. These newly discovered outflowing components would be explained through ISM shocked by the hot wind, instead of free expanding wind alone. Through detailed numerical simulations, we find the hot wind helps not only keep the inner region hot, but also effectively impede the black hole accretion of gas, providing strong evidences for the energy and momentum feedback in LLAGNs.
