Abell 1201: Detection of an Ultramassive Black Hole in a Strong Gravitational Lens

James. W. Nightingale, Russell J. Smith, Qiuhan He +9

Supermassive black holes (SMBHs) are a key catalyst of galaxy formation and evolution, leading to an observed correlation between SMBH mass $M_{\mathrm{BH}}$ and host galaxy velocity di…