Accurate Baryon Acoustic Oscillations Reconstruction via

被引：0

作者：

von Hausegger, Sebastian ^{[1
,2
,3
]}

Levy, Bruno ^{[2
]}

Mohayaee, Roya ^{[1
,3
]}

机构：

[1] Univ Oxford, Rudolf Peierls Ctr Theoret Phys, Parks Rd, Oxford OX1 3PU, England

[2] Univ Lorraine, LORIA, INRIA, CNRS, F-54000 Nancy, France

[3] Sorbonne Univ, Inst Astrophys Paris, CNRS, 98Bis Bld Arago, F-75014 Paris, France

来源：

PHYSICAL REVIEW LETTERS | 2022年 / 128卷 / 20期

关键词：

SEMIDISCRETE OPTIMAL TRANSPORT; SCALE; UNIVERSE; PERTURBATION; SYSTEMATICS; ALGORITHM;

D O I：

10.1103/PhysRevLett.128.201302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Optimal transport theory has recently re-emerged as a vastly resourceful field of mathematics with elegant applications across physics and computer science. Harnessing methods from geometry processing, we report on the efficient implementation for a specific problem in cosmology???the reconstruction of the linear density field from low redshifts, in particular the recovery of the baryonic acoustic oscillation (BAO) scale. We demonstrate our algorithm???s accuracy by retrieving the BAO scale in noiseless cosmological simulations that are dedicated to cancel cosmic variance; we find uncertainties to be reduced by a factor of 4.3 compared with performing no reconstruction, and a factor of 3.1 compared with standard reconstruction.

引用

页数：6

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