Astrophys. J., 833, 79-79 (2016/December-2)
The universal "heartbeat" oscillations in black hole systems across the mass-scale.
WU Q., CZERNY B., GRZEDZIELSKI M., JANIUK A., GU W.-M., DONG A.-J., CAO X.-F., YOU B., YAN Z. and SUN M.-Y.
Abstract (from CDS):
The hyperluminous X-ray source (HLX-1, peak X-ray luminosity ∼1042 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 ∼105 M☉. 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.
© 2016. The American Astronomical Society. All rights reserved.
accretion, accretion disks - black hole physics - instabilities - X-rays: binaries - X-rays: individual: ESO 243-49 HLX-1. - X-rays: individual: ESO 243-49 HLX-1.
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