Is GW151226 really a gravitational wave signal?

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Zhe Chang, Chao-Guang Huang and Zhi-Chao Zhao. Is GW151226 really a gravitational wave signal?[J]. Chinese Physics C, 2017, 41(2): 025001. doi: 10.1088/1674-1137/41/2/025001
Zhe Chang, Chao-Guang Huang and Zhi-Chao Zhao. Is GW151226 really a gravitational wave signal?[J]. Chinese Physics C, 2017, 41(2): 025001.  doi: 10.1088/1674-1137/41/2/025001 shu
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Received: 2016-08-13
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    Supported by National Natural Science Foundation of China (11275207, 11375203, 11690022, 11675182) and Strategic Priority Research Program of the Chinese Academy of Sciences Multi-waveband Gravitational Wave Universe (XDB23040000)

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Is GW151226 really a gravitational wave signal?

    Corresponding author: Zhe Chang,
    Corresponding author: Chao-Guang Huang,
    Corresponding author: Zhi-Chao Zhao,
  • 1. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • 2. School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China
Fund Project:  Supported by National Natural Science Foundation of China (11275207, 11375203, 11690022, 11675182) and Strategic Priority Research Program of the Chinese Academy of Sciences Multi-waveband Gravitational Wave Universe (XDB23040000)

Abstract: Recently, the LIGO Scientific Collaboration and Virgo Collaboration published the second observation of a gravitational wave, GW151226[Phys. Rev. Lett. 116, 241103 (2016)], from a binary black hole coalescence with initial masses about 14 M and 8 M. They claimed that the peak gravitational strain was reached at about 450 Hz, the inverse of which is longer than the average time a photon stays in the Fabry-Perot cavities in the two arms. In this case, the phase-difference of a photon in the two arms due to the propagation of a gravitational wave does not always increase as the photon stays in the cavities. It might even be cancelled to zero in extreme cases. When the propagation effect is taken into account, we find that the claimed signal GW151226 almost disappears.

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