The universal "heartbeat" oscillations in black hole systems accross the mass-scale

Qingwen Wu, Bozena Czerny, Mikolaj Grzedzielski +7

The hyperluminous X-ray source (HLX-1, the peak X-ray luminosity $\sim 10^{42}\mathrm{erg}{\mathrm{s}}^{-1}$) near the spiral galaxy ESO 243-49 is possibly the best candidate for intermediate ma…