A unified catalogue-level reanalysis of stage-III cosmic shear surveys
Abstract
ABSTRACT Cosmological parameter constraints from recent galaxy imaging surveys are reaching percent-level accuracy on the effective amplitude of the lensing signal, S8. The upcoming Legacy Survey of Space and Time (LSST) of the Vera C. Rubin Observatory will produce subpercent level measurements of cosmological parameters, providing a milestone test of the ΛCDM model. To supply guidance to the upcoming LSST analysis, it is important to understand thoroughly the results from different recent galaxy imaging surveys and assess their consistencies. In this work, we perform a unified catalogue-level reanalysis of three cosmic shear data sets: the first year data from the Dark Energy Survey (DES-Y1), the 1000 deg2 data set from the Kilo-Degree Survey (KiDS-1000), and the first year data from the Hyper Suprime-Cam Subaru Strategic Program (HSC-Y1). We utilize a pipeline developed and rigorously tested by the LSST Dark Energy Science Collaboration to perform the reanalysis and assess the robustness of the results to analysis choices. We find the S8 constraint to be robust to two different small-scale modelling approaches, and varying choices of cosmological priors. Our unified analysis allows the consistency of the surveys to be rigorously tested, and we find the three surveys to be statistically consistent. Due tomore »
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1958345
- Grant/Contract Number:
- SC0010007; SC0021949; SC0010118; AC02-05CH11231
- Resource Type:
- Published Article
- Journal Name:
- Monthly Notices of the Royal Astronomical Society
- Additional Journal Information:
- Journal Name: Monthly Notices of the Royal Astronomical Society Journal Volume: 520 Journal Issue: 4; Journal ID: ISSN 0035-8711
- Publisher:
- Oxford University Press
- Country of Publication:
- United Kingdom
- Language:
- English
Citation Formats
Longley, Emily P., Chang, Chihway, Walter, Christopher W., Zuntz, Joe, Ishak, Mustapha, Mandelbaum, Rachel, Miyatake, Hironao, Nicola, Andrina, Pedersen, Eske M., Pereira, Maria E. S., Prat, Judit, Sánchez, J., Secco, Lucas F., Tröster, Tilman, Troxel, Michael, Wright, Angus H., and The LSST Dark Energy Science Collaboration. A unified catalogue-level reanalysis of stage-III cosmic shear surveys. United Kingdom: N. p., 2023.
Web. doi:10.1093/mnras/stad246.
Longley, Emily P., Chang, Chihway, Walter, Christopher W., Zuntz, Joe, Ishak, Mustapha, Mandelbaum, Rachel, Miyatake, Hironao, Nicola, Andrina, Pedersen, Eske M., Pereira, Maria E. S., Prat, Judit, Sánchez, J., Secco, Lucas F., Tröster, Tilman, Troxel, Michael, Wright, Angus H., & The LSST Dark Energy Science Collaboration. A unified catalogue-level reanalysis of stage-III cosmic shear surveys. United Kingdom. https://doi.org/10.1093/mnras/stad246
Longley, Emily P., Chang, Chihway, Walter, Christopher W., Zuntz, Joe, Ishak, Mustapha, Mandelbaum, Rachel, Miyatake, Hironao, Nicola, Andrina, Pedersen, Eske M., Pereira, Maria E. S., Prat, Judit, Sánchez, J., Secco, Lucas F., Tröster, Tilman, Troxel, Michael, Wright, Angus H., and The LSST Dark Energy Science Collaboration. Sat .
"A unified catalogue-level reanalysis of stage-III cosmic shear surveys". United Kingdom. https://doi.org/10.1093/mnras/stad246.
@article{osti_1958345,
title = {A unified catalogue-level reanalysis of stage-III cosmic shear surveys},
author = {Longley, Emily P. and Chang, Chihway and Walter, Christopher W. and Zuntz, Joe and Ishak, Mustapha and Mandelbaum, Rachel and Miyatake, Hironao and Nicola, Andrina and Pedersen, Eske M. and Pereira, Maria E. S. and Prat, Judit and Sánchez, J. and Secco, Lucas F. and Tröster, Tilman and Troxel, Michael and Wright, Angus H. and The LSST Dark Energy Science Collaboration},
abstractNote = {ABSTRACT Cosmological parameter constraints from recent galaxy imaging surveys are reaching percent-level accuracy on the effective amplitude of the lensing signal, S8. The upcoming Legacy Survey of Space and Time (LSST) of the Vera C. Rubin Observatory will produce subpercent level measurements of cosmological parameters, providing a milestone test of the ΛCDM model. To supply guidance to the upcoming LSST analysis, it is important to understand thoroughly the results from different recent galaxy imaging surveys and assess their consistencies. In this work, we perform a unified catalogue-level reanalysis of three cosmic shear data sets: the first year data from the Dark Energy Survey (DES-Y1), the 1000 deg2 data set from the Kilo-Degree Survey (KiDS-1000), and the first year data from the Hyper Suprime-Cam Subaru Strategic Program (HSC-Y1). We utilize a pipeline developed and rigorously tested by the LSST Dark Energy Science Collaboration to perform the reanalysis and assess the robustness of the results to analysis choices. We find the S8 constraint to be robust to two different small-scale modelling approaches, and varying choices of cosmological priors. Our unified analysis allows the consistency of the surveys to be rigorously tested, and we find the three surveys to be statistically consistent. Due to the partially overlapping footprint, we model the cross-covariance between KiDS-1000 and HSC-Y1 approximately when combining all three data sets, resulting in a 1.6–1.9 per cent constraint on S8 given different assumptions on the cross-covariance.},
doi = {10.1093/mnras/stad246},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 4,
volume = 520,
place = {United Kingdom},
year = {Sat Jan 28 00:00:00 EST 2023},
month = {Sat Jan 28 00:00:00 EST 2023}
}
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