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  Measurement of Parity-Odd Modes in the Large-Scale 4-Point Correlation Function of SDSS BOSS DR12 CMASS and LOWZ Galaxies

Hou, J., Slepian, Z., & Cahn, R. N. (2023). Measurement of Parity-Odd Modes in the Large-Scale 4-Point Correlation Function of SDSS BOSS DR12 CMASS and LOWZ Galaxies. Monthly Notices of the Royal Astronomical Society, 522(4), 5701-5739. doi:10.1093/mnras/stad1062.

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アイテムのパーマリンク: https://hdl.handle.net/21.11116/0000-000E-4E45-E 版のパーマリンク: https://hdl.handle.net/21.11116/0000-000E-4E46-D
資料種別: 学術論文

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Measurement of Parity-Odd Modes in the Large-Scale 4-Point Correlation Function of SDSS BOSS DR12 CMASS and LOWZ Galaxies.pdf (全文テキスト(全般)), 21MB
 
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Measurement of Parity-Odd Modes in the Large-Scale 4-Point Correlation Function of SDSS BOSS DR12 CMASS and LOWZ Galaxies.pdf
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 作成者:
Hou, Jiamin1, 著者           
Slepian, Zachary, 著者
Cahn, Robert N., 著者
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1Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159895              

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 要旨: A tetrahedron is the simplest shape that cannot be rotated into its mirror image in 3D. The 4-Point Correlation Function (4PCF), which quantifies excess clustering of quartets of galaxies over random, is the lowest-order statistic sensitive to parity violation. Each galaxy defines one vertex of the tetrahedron. Parity-odd modes of the 4PCF probe an imbalance between tetrahedra and their mirror images. We measure these modes from the largest currently available spectroscopic samples, the 280,067 Luminous Red Galaxies (LRGs) of the Baryon Oscillation Spectroscopic Survey (BOSS) DR12 LOWZ (z¯=0.32) and the 803,112 LRGS of BOSS DR12 CMASS (z¯=0.57). In LOWZ we find 3.1σ evidence for a non-zero parity-odd 4PCF, and in CMASS we detect a parity-odd 4PCF at 7.1σ. Gravitational evolution alone does not produce this effect; parity-breaking in LSS, if cosmological in origin, must stem from the epoch of inflation. We have explored many sources of systematic error and found none that can produce a spurious parity-odd \textit{signal} sufficient to explain our result. Underestimation of the \textit{noise} could also lead to a spurious detection. Our reported significances presume that the mock catalogs used to calculate the covariance sufficiently capture the covariance of the true data. We have performed numerous tests to explore this issue. The odd-parity 4PCF opens a new avenue for probing new forces during the epoch of inflation with 3D LSS; such exploration is timely given large upcoming spectroscopic samples such as DESI and Euclid.

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言語: eng - English
 日付: 2023-05-22
 出版の状態: オンラインで出版済み
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 査読: 査読あり
 識別子(DOI, ISBNなど): DOI: 10.1093/mnras/stad1062
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出版物名: Monthly Notices of the Royal Astronomical Society
  その他 : Mon. Not. R. Astron. Soc.
種別: 学術雑誌
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出版社, 出版地: Oxford : Oxford University Press
ページ: - 巻号: 522 (4) 通巻号: - 開始・終了ページ: 5701 - 5739 識別子(ISBN, ISSN, DOIなど): ISSN: 1365-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150