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Date and Time of the Query: 2019-06-19 T05:49:56 PDT
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For refcode 2016ApJ...833...79W:
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2016ApJ...833...79W The Universal "Heartbeat" Oscillations in Black Hole Systems Across the Mass-scale Wu, Qingwen; Czerny, Bozena; Grzedzielski, Mikolaj; Janiuk, Agnieszka; Gu, Wei-Min; Dong, Ai-jun; Cao, Xiao-Feng; You, Bei; Yan, Zhen; Sun, Mou-Yuan Abstract. The hyperluminous X-ray source (HLX-1, peak X-ray luminosity ~ {10}^42^ {erg} {{{s}}}^-1^) near the spiral galaxy ESO 243-49, which underwent recurrent outbursts within a period of ~400 days, is possibly the best candidate for an intermediate mass black hole (IMBH). The physical reason for this quasiperiodic variability is still unclear. We explore the possibility of radiation-pressure instability in the accretion disk by modeling the light curve of HLX-1, and find that it can roughly reproduce the duration, period, and amplitude of the recurrent outbursts in HLX-1 with an IMBH of ~ {10}^5^ {M}_sun_. Our result provides a possible mechanism to explain the recurrent outbursts in HLX-1. We further find a universal correlation between the outburst duration and the bolometric luminosity for the black hole (BH) sources with a very broad mass range (e.g., X-ray binaries, HLX-1, and active galactic nuclei), which is roughly consistent with the prediction of radiation-pressure instability of the accretion disk. These results imply that "heartbeat" oscillations triggered by radiation-pressure instability may appear in different-scale BH systems. Key words: accretion, accretion disks, black hole physics, instabilities, X-rays: binaries, X-rays: individual: ESO 243-49 HLX-1.
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