Revisiting the Evidence for an Intermediate-mass Black Hole in the Center of NGC 6624 with Simulations

Li-Chun Wang, Yi Xie

The acceleration of LMXB 4U 1820-30 that derived from its orbital-period derivative ${\dot{P}}_{\mathrm{b}}$ was supposed to be the evidence for an Intermediate-mass Black Hole (IMBH) in t…