@article{d8567da635be4a3f817f089567a61a00,
title = "DES Y3 + KiDS-1000: Consistent cosmology combining cosmic shear surveys",
abstract = "We present a joint cosmic shear analysis of the Dark Energy Survey (DES Y3) and the Kilo-Degree Survey (KiDS-1000) in a collaborative effort between the two survey teams. We find consistent cosmological parameter constraints between DES Y3 and KiDS-1000 which, when combined in a joint-survey analysis, constrain the parameter $S_8 = \sigma_8 \sqrt{\Omega_{\rm m}/0.3}$ with a mean value of $0.790^{+0.018}_{-0.014}$. The mean marginal is lower than the maximum a posteriori estimate, $S_8=0.801$, owing to skewness in the marginal distribution and projection effects in the multi-dimensional parameter space. Our results are consistent with $S_8$ constraints from observations of the cosmic microwave background by Planck, with agreement at the $1.7\sigma$ level. We use a Hybrid analysis pipeline, defined from a mock survey study quantifying the impact of the different analysis choices originally adopted by each survey team. We review intrinsic alignment models, baryon feedback mitigation strategies, priors, samplers and models of the non-linear matter power spectrum. ",
keywords = "astro-ph.CO, UKRI, STFC, ST/V000594/1, ST/V000780/1",
author = "{DES Collaboration} and {Kilo-Degree Survey Collaboration} and Survey, {Dark Energy} and Collaboration, {Kilo-Degree Survey} and Abbott, {T. M. C.} and M. Aguena and A. Alarcon and O. Alves and A. Amon and F. Andrade-Oliveira and S. Avila and D. Bacon and K. Bechtol and Becker, {M. R.} and Bernstein, {G. M.} and E. Bertin and M. Bilicki and J. Blazek and S. Bocquet and D. Brooks and P. Burger and Burke, {D. L.} and H. Camacho and A. Campos and Rosell, {A. Carnero} and Kind, {M. Carrasco} and J. Carretero and Castander, {F. J.} and R. Cawthon and R. Chen and A. Choi and C. Conselice and J. Cordero and M. Crocce and Costa, {L. N. da} and Pereira, {M. E. da Silva} and R. Dalal and C. Davis and Jong, {J. T. A. de} and J. DeRose and S. Desai and Diehl, {H. T.} and S. Dodelson and P. Doel and C. Doux and A. Drlica-Wagner and A. Dvornik and K. Eckert and Eifler, {T. F.} and J. Elvin-Poole and S. Joudaki",
note = "40 pages, 21 figures, 15 tables, accepted Open Journal of Astrophysics. Download the chains from https://des.ncsa.illinois.edu/releases/y3a2/Y3key-joint-des-kids or create your own chains with CosmoSIS using https://github.com/joezuntz/cosmosis-standard-library/blob/main/examples/des-y3_and_kids-1000.ini Watch the core team discuss this analysis at https://cosmologytalks.com/2023/05/26/des-kids",
year = "2023",
month = oct,
day = "20",
doi = "10.21105/astro.2305.17173",
language = "English",
volume = "6",
journal = "The Open Journal of Astrophysics",
}