An iterative reconstruction of cosmological initial density fields

Abstract We present an iterative method to reconstruct the linear-theory initial conditions from the late-time cosmological matter density field, with the intent of improving the recovery of the cosmic distance scale from the baryon acoustic oscillations. We present tests using the dark matter densi...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2018-08, Vol.478 (2), p.1866-1874
Main Authors: Hada, Ryuichiro, Eisenstein, Daniel J
Format: Article
Language:English
Subjects:
Astronomy & Astrophysics
ASTRONOMY AND ASTROPHYSICS
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Summary:Abstract We present an iterative method to reconstruct the linear-theory initial conditions from the late-time cosmological matter density field, with the intent of improving the recovery of the cosmic distance scale from the baryon acoustic oscillations. We present tests using the dark matter density field in both real and redshift space generated from an N-body simulation. In redshift space at z = 0.5, we find that the reconstructed displacement field using our iterative method are more than 80 per cent correlated with the true displacement field of the dark matter particles on scales k 
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/sty1203