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 with a mean value of . The mean marginal is lower than the maximum a posteriori estimate, , owing to skewness in the marginal distribution and projection effects in the multi-dimensional parameter space. Our results are consistent with constraints from observations of the cosmic microwave background by Planck, with agreement at the 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
Cite
@article{arxiv.2305.17173,
title = {DES Y3 + KiDS-1000: Consistent cosmology combining cosmic shear surveys},
author = {Dark Energy Survey and Kilo-Degree Survey Collaboration and : and T. M. C. Abbott and M. Aguena and A. Alarcon and O. Alves and A. Amon and F. Andrade-Oliveira and M. Asgari and S. Avila and D. Bacon and K. Bechtol and M. R. Becker and G. M. Bernstein and E. Bertin and M. Bilicki and J. Blazek and S. Bocquet and D. Brooks and P. Burger and D. L. Burke and H. Camacho and A. Campos and A. Carnero Rosell and M. Carrasco Kind and J. Carretero and F. J. Castander and R. Cawthon and C. Chang and R. Chen and A. Choi and C. Conselice and J. Cordero and M. Crocce and L. N. da Costa and M. E. da Silva Pereira and R. Dalal and C. Davis and J. T. A. de Jong and J. DeRose and S. Desai and H. T. Diehl and S. Dodelson and P. Doel and C. Doux and A. Drlica-Wagner and A. Dvornik and K. Eckert and T. F. Eifler and J. Elvin-Poole and S. Everett and X. Fang and I. Ferrero and A. Ferté and B. Flaugher and O. Friedrich and J. Frieman and J. García-Bellido and M. Gatti and G. Giannini and B. Giblin and D. Gruen and R. A. Gruendl and G. Gutierrez and I. Harrison and W. G. Hartley and K. Herner and C. Heymans and H. Hildebrandt and S. R. Hinton and H. Hoekstra and D. L. Hollowood and K. Honscheid and H. Huang and E. M. Huff and D. Huterer and D. J. James and M. Jarvis and N. Jeffrey and T. Jeltema and B. Joachimi and S. Joudaki and A. Kannawadi and E. Krause and K. Kuehn and K. Kuijken and N. Kuropatkin and O. Lahav and P. -F. Leget and P. Lemos and S. -S. Li and X. Li and A. R. Liddle and M. Lima and C. -A Lin and H. Lin and N. MacCrann and C. Mahony and J. L. Marshall and J. McCullough and J. Mena-Fernández and F. Menanteau and R. Miquel and J. J. Mohr and J. Muir and J. Myles and N. Napolitano and A. Navarro-Alsina and R. L. C. Ogando and A. Palmese and S. Pandey and Y. Park and M. Paterno and J. A. Peacock and D. Petravick and A. Pieres and A. A. Plazas Malagón and A. Porredon and J. Prat and M. Radovich and M. Raveri and R. Reischke and N. C. Robertson and R. P. Rollins and A. K. Romer and A. Roodman and E. S. Rykoff and S. Samuroff and C. Sánchez and E. Sanchez and J. Sanchez and P. Schneider and L. F. Secco and I. Sevilla-Noarbe and H. -Y. Shan and E. Sheldon and T. Shin and C. Sifón and M. Smith and M. Soares-Santos and B. Stölzner and E. Suchyta and M. E. C. Swanson and G. Tarle and D. Thomas and C. To and M. A. Troxel and T. Tröster and I. Tutusaus and J. L. van den Busch and T. N. Varga and A. R. Walker and N. Weaverdyck and R. H. Wechsler and J. Weller and P. Wiseman and A. H. Wright and B. Yanny and B. Yin and M. Yoon and Y. Zhang and J. Zuntz},
journal= {arXiv preprint arXiv:2305.17173},
year = {2023}
}
Comments
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