Black Hole mass determination in HLX-1

Black hole masses are distributed in the Universe across many orders of magnitude in mass,  from X-ray binaries (several solar masses) up to supermassive black holes in the centers of Active Galactic Nuclei (millions or billions solar masses). Between those two groups exists a class of objects called Intermediate Mass Black Holes.

The Ultraluminous X-ray source HLX-1 has undergone six regular outbursts in the period of six years. Its average luminosity is on the order of 1042 erg/s.
Using our time-dependent code GLADIS (GLobal Accretion Disk Instability Simulation) with modified viscosity prescription we modeled the dependence between most important lightcurve observables and model parameters (BH mass and accretion rate). In result we determined HLX-1 black hole mass at the level of 190 000 solar masses, and its Eddington ratio at the level of 0.09- 0.18 (0.6-1.2 * 10-3 Solar mass per year).

HLX-1 Intermediate-Mass Black Hole disk lightcurve observations and modelling

HLX-1 Intermediate-Mass Black Hole disk lightcurve observations and modelling


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