HLX-1, currently the best intermediate-mass black hole candidate, has undergone seven violent outbursts, each with a peak X-ray luminosity of Lpeak,X∼1042ergs−1. Interestingly, the properties of the HLX-1 outbursts evolve with time. In this work, we aim to constrain the physical parameters of the central engine of the HLX-1 outbursts in the framework of the black hole accretion. We find that the physical properties of the HLX-1 outbursts are consistent with being driven by the radiation pressure instability. This scenario can explain the evolution of the recurrent timescales of the HLX-1 outbursts as a function of the durations.
@article{arxiv.1608.01924,
title = {On the origin of the HLX-1 outbursts},
author = {Mouyuan Sun and Wei-Min Gu and Zhen Yan and Qingwen Wu and Tong Liu},
journal= {arXiv preprint arXiv:1608.01924},
year = {2016}
}
Comments
4 pages, 2 figures, accepted for publication in MNRAS Letters