| アイテムタイプ |
itemtype_ver1(1) |
| 公開日 |
2025-11-27 |
| タイトル |
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タイトル |
Testing local position invariance with odd multipoles of galaxy clustering statistics |
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言語 |
en |
| 著者 |
Inoue, Takuya
Okumura, Teppei
Saga, Shohei
Taruya, Atsushi
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| アクセス権 |
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アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利 |
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権利情報 |
© 2025 American Physical Society |
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言語 |
en |
| 内容記述 |
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内容記述タイプ |
Abstract |
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内容記述 |
We investigate cosmological constraints on local position invariance (LPI), a key aspect of the Einstein equivalence principle (EEP), through asymmetric galaxy clustering. The LPI asserts that the outcomes of the nongravitational experiments are identical regardless of location in spacetime and has been tested through measurements of the gravitational redshift effect. Therefore, measuring the gravitational redshift effect encoded in galaxy clustering provides a powerful and novel cosmological probe of the LPI. Recent work by Saga et al. proposed its validation using the cross-correlation function between distinct galaxy samples, but their analysis focused solely on the dipole moment. In this paper, we extend their work by further analyzing a higher-order odd multipole moment, the octupole moment, in the constraints on the LPI-violating parameter, 𝛼 , expected from galaxy surveys such as Dark Energy Spectroscopic Instrument, Euclid space telescope, Subaru Prime Focus Spectrograph, and Square Kilometre Array. We demonstrate that combining the octupole and dipole moments significantly improves the constraints, particularly when the analysis is restricted to larger scales, characterized by a large minimum separation 𝑠min . For a conservative setup with 𝑠min=15 Mpc/ℎ , we find an average improvement of 11% compared to using the dipole moment alone. Our results highlight the importance of higher-order multipoles in constraining 𝛼 , providing a more robust approach to testing the EEP on cosmological scales. |
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言語 |
en |
| 出版者 |
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出版者 |
American Physical Society |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプresource |
http://purl.org/coar/resource_type/c_6501 |
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タイプ |
journal article |
| 出版タイプ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 関連情報 |
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関連タイプ |
isVersionOf |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1103/PhysRevD.111.L081303 |
| 収録物識別子 |
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収録物識別子タイプ |
PISSN |
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収録物識別子 |
2470-0010 |
| 書誌情報 |
ja : PHYSICAL REVIEW D
巻 111,
号 8,
p. L081303,
発行日 2025-04-22
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PhysRevD_111_L081303.pdf (585 KB)
