Discrepancy in tidal deformability of GW170817 between the Advanced LIGO twin detectors
We find that the Hanford and Livingston detectors of Advanced LIGO derive a distinct posterior probability distribution of binary tidal deformability Λ[over ̃] of the first binary-neutron-star merger GW170817. By analyzing public data of GW170817 with a nested-sampling engine and the default TaylorF...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2019-10-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.1.033055 |
| _version_ | 1797211689859416064 |
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| author | Tatsuya Narikawa Nami Uchikata Kyohei Kawaguchi Kenta Kiuchi Koutarou Kyutoku Masaru Shibata Hideyuki Tagoshi |
| author_facet | Tatsuya Narikawa Nami Uchikata Kyohei Kawaguchi Kenta Kiuchi Koutarou Kyutoku Masaru Shibata Hideyuki Tagoshi |
| author_sort | Tatsuya Narikawa |
| collection | DOAJ |
| description | We find that the Hanford and Livingston detectors of Advanced LIGO derive a distinct posterior probability distribution of binary tidal deformability Λ[over ̃] of the first binary-neutron-star merger GW170817. By analyzing public data of GW170817 with a nested-sampling engine and the default TaylorF2 waveform provided by the LALInference package, the probability distribution of the binary tidal deformability derived by the LIGO-Virgo detector network turns out to be determined dominantly by the Hanford detector. Specifically, by imposing the flat prior on tidal deformability of individual stars, symmetric 90% credible intervals of Λ[over ̃] are estimated to be 527_{−345}^{+619} with the Hanford detector, 927_{−619}^{+522} with the Livingston detector, and 455_{−281}^{+668} with the LIGO-Virgo detector network. Furthermore, the distribution derived by the Livingston detector changes irregularly when we vary the maximum frequency of the data used in the analysis. This feature is not observed for the Hanford detector. While they are all consistent, the discrepancy and irregular behavior suggest that an in-depth study of noise properties might improve our understanding of GW170817 and future events. |
| first_indexed | 2024-04-24T10:30:29Z |
| format | Article |
| id | doaj.art-a88bce1b9f454265be679ad1a9c0d74c |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:30:29Z |
| publishDate | 2019-10-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-a88bce1b9f454265be679ad1a9c0d74c2024-04-12T16:46:26ZengAmerican Physical SocietyPhysical Review Research2643-15642019-10-011303305510.1103/PhysRevResearch.1.033055Discrepancy in tidal deformability of GW170817 between the Advanced LIGO twin detectorsTatsuya NarikawaNami UchikataKyohei KawaguchiKenta KiuchiKoutarou KyutokuMasaru ShibataHideyuki TagoshiWe find that the Hanford and Livingston detectors of Advanced LIGO derive a distinct posterior probability distribution of binary tidal deformability Λ[over ̃] of the first binary-neutron-star merger GW170817. By analyzing public data of GW170817 with a nested-sampling engine and the default TaylorF2 waveform provided by the LALInference package, the probability distribution of the binary tidal deformability derived by the LIGO-Virgo detector network turns out to be determined dominantly by the Hanford detector. Specifically, by imposing the flat prior on tidal deformability of individual stars, symmetric 90% credible intervals of Λ[over ̃] are estimated to be 527_{−345}^{+619} with the Hanford detector, 927_{−619}^{+522} with the Livingston detector, and 455_{−281}^{+668} with the LIGO-Virgo detector network. Furthermore, the distribution derived by the Livingston detector changes irregularly when we vary the maximum frequency of the data used in the analysis. This feature is not observed for the Hanford detector. While they are all consistent, the discrepancy and irregular behavior suggest that an in-depth study of noise properties might improve our understanding of GW170817 and future events.http://doi.org/10.1103/PhysRevResearch.1.033055 |
| spellingShingle | Tatsuya Narikawa Nami Uchikata Kyohei Kawaguchi Kenta Kiuchi Koutarou Kyutoku Masaru Shibata Hideyuki Tagoshi Discrepancy in tidal deformability of GW170817 between the Advanced LIGO twin detectors Physical Review Research |
| title | Discrepancy in tidal deformability of GW170817 between the Advanced LIGO twin detectors |
| title_full | Discrepancy in tidal deformability of GW170817 between the Advanced LIGO twin detectors |
| title_fullStr | Discrepancy in tidal deformability of GW170817 between the Advanced LIGO twin detectors |
| title_full_unstemmed | Discrepancy in tidal deformability of GW170817 between the Advanced LIGO twin detectors |
| title_short | Discrepancy in tidal deformability of GW170817 between the Advanced LIGO twin detectors |
| title_sort | discrepancy in tidal deformability of gw170817 between the advanced ligo twin detectors |
| url | http://doi.org/10.1103/PhysRevResearch.1.033055 |
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