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The effect on cosmological parameter estimation of a parameter dependent covariance matrix

Abstract:

Cosmological large-scale structure analyses based on two-point correlation functions often assume a Gaussian likelihood function with a fixed covariance matrix. We study the impact on cosmological parameter estimation of ignoring the parameter dependence of this covariance matrix, focusing on the particular case of joint weak-lensing and galaxy clustering analyses. Using a Fisher matrix formalism (calibrated against exact likelihood evaluation in particular simple cases), we quantify the effe...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.21105/astro.1811.11584

Authors


More by this author
Institution:
University of Oxford
Division:
MPLS Division
Department:
Physics
Sub department:
Astrophysics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Astrophysics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS Division
Department:
Physics
Sub department:
Astrophysics
Role:
Author
More from this funder
Name:
Beecroft Trust
Funding agency for:
Alsono, D
Ferreira, PG
Grant:
ST/P004474/1
More from this funder
Name:
Science and Technology Facilities Council
Funding agency for:
Alsono, D
Ferreira, PG
Grant:
ST/P004474/1
More from this funder
Name:
European Research Council
Funding agency for:
Kodwani, D
Ferreira, PG
Publisher:
Maynooth Academic Publishing
Journal:
Open Journal of Astrophysics More from this journal
Publication date:
2019-03-20
Acceptance date:
2019-03-19
DOI:
Pubs id:
pubs:987487
UUID:
uuid:fa6cce4f-4b33-4c5d-8c24-b6e65a02d980
Local pid:
pubs:987487
Source identifiers:
987487
Deposit date:
2019-04-03

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