Kavli Affiliate: Lijing Shao
| First 5 Authors: Hai-Tian Wang, Ziming Wang, Yiming Dong, Garvin Yim, Lijing Shao
| Summary:
The ringdown phase of a gravitational wave (GW) signal from a binary black
hole merger provides valuable insights into the properties of the final black
hole and serves as a critical test of general relativity in the strong-field
regime. A key aspect of this investigation is to determine whether the first
overtone mode exists in real GW data, as its presence would offer significant
implications for our understanding of general relativity under extreme
conditions. To address this, we conducted a reanalysis of the ringdown signal
from GW150914, using the newly proposed F-statistic method to search for the
first overtone mode. Our results are consistent with those obtained through
classical time-domain Bayesian inference, indicating that there is no evidence
of the first overtone mode in the ringdown signal of GW150914. However, our
results show the potentiality of utilizing the F-statistic methodology to
unearth nuanced features within GW signals, thereby contributing novel insights
into black hole properties.
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