首页|The Multi-parameter Test of Gravitational Wave Dispersion with Principal Component Analysis

The Multi-parameter Test of Gravitational Wave Dispersion with Principal Component Analysis

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In this work,we consider a conventional test of gravitational wave(GW)propagation which is based on the phenomenological parameterized dispersion relation to describe potential departures from General Relativity(GR)along the propagation of GWs.But different from tests conventionally performed previously,we vary multiple deformation coefficients simultaneously and employ the principal component analysis(PCA)method to remedy the strong degeneracy among deformation coefficients and obtain informative posteriors.The dominant PCA components can be better measured and constrained,and thus are expected to be more sensitive to potential departures from the waveform model.Using this method we analyze ten selected events and get the result that the combined posteriors of the dominant PCA parameters are consistent with GR within 99.7％credible intervals.The standard deviation of the first dominant PCA parameter is three times smaller than that of the original dispersion parameter of the leading order.However,the multi-parameter test with PCA is more sensitive to not only potential deviations from GR but also systematic errors of waveform models.The difference in results obtained by using different waveform templates hints that the demands of waveform accuracy are higher to perform the multi-parameter test with PCA.Whereas,it cannot be strictly proven that the deviation is indeed and only induced by systematic errors.It requires more thorough research in the future to exclude other possible reasons in parameter estimation and data processing.

gravitational wavesgravitationblack hole physics

Zhi-Chu Ma、Rui Niu、Wen Zhao

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CAS Key Laboratory for Research in Galaxies and Cosmology,Department of Astronomy,University of Science and Technology of China,Hefei 230026,China

School of Astronomy and Space Sciences,University of Science and Technology of China,Hefei 230026,China

National Key R&D Program of ChinaNational Key R&D Program of ChinaStrategic Priority Research Program of the Chinese Academy of ScienceNational Natural Science Foundation of China(NSFC)National Natural Science Foundation of China(NSFC)Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central UniversitiesScience Research Grants from the China Manned Space Project111 Project for"Observational and Theoretical Research on Dark Matter and Dark Energy"National Key Research and Development Program of China

2022YFC22046022021YFC2203102XDB05503001232530112273035WK2030000036WK3440000004CMS-CSST-2021-B01B230422022YFC2807303

2024

10.1088/1674-4527/ad3c70

天文和天体物理学研究
中国科学院国家天文台

天文和天体物理学研究

CSTPCD
影响因子：0.406
ISSN：1674-4527
年,卷(期)：2024.24(5)
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