Oral Presentation

Mass Accretion onto the Supermassive Black Hole in M87 by Utilizing sub-mm Polarization

Author(s): Masanori Nakamura, on behalf of the Greenland Telescope Project Team

Presenter: Keiichi Asada (ASIAA)

Faraday rotation measures give us a crucial information on the accreting material onto supermassive black hole (SMBHs) in low-luminosity AGNs (LLAGNs). By utilizing SMA and ALMA observations, we derive the mass accretion rate (M dot) in the vicinity of the SMBH in M87. Our observational results indicate a substantial decrease of the M dot, compared with the value at Bondi radius, suggesting that a radiatively inefficient accretion flow presumably takes place. The mechanism of powering the relativistic jets in LLAGNs will also be discussed.