Testing evolution of LFQPOs with mass accretion rate in GRS 1915+105 with Insight-HXMT
Abstract
Using the Insight-HXMT observations of GRS 1915+105 when it exhibits low frequency quasi-periodic oscillations (QPOs), we measure the evolution of the QPO frequency along with disk inner radius and mass accretion rate. We find a tight positive correlation between the QPO frequency and mass accretion rate. Our results extend the finding of previous work with AstroSat to a larger range of accretion rate with independent instruments and observations. Treating the QPO frequency of GRS 1915+105 as the relativistic dynamic frequency of a truncated disk, we are able to confirm the high spin nature of the black hole in GRS 1915+105. We also address the potential of our finding to test general relativity in the future.
Keywords
Cite
@article{arxiv.2012.01825,
title = {Testing evolution of LFQPOs with mass accretion rate in GRS 1915+105 with Insight-HXMT},
author = {Honghui Liu and Long Ji and Cosimo Bambi and Pankaj Jain and Ranjeev Misra and Divya Rawat and J. S. Yadav and Yuexin Zhang},
journal= {arXiv preprint arXiv:2012.01825},
year = {2021}
}
Comments
8 pages, 6 figures. v2: refereed version