The N5K Challenge: Non-Limber Integration for LSST Cosmology

Autor: C. Danielle Leonard, Tassia Ferreira, Xiao Fang, Robert Reischke, Nils Schoeneberg, Tilman Tröster, David Alonso, Jean-Eric Campagne, François Lanusse, Anže Slosar, Mustapha Ishak, LSST Dark Energy Science Collaboration

Publikováno v: The Open Journal of Astrophysics, Vol 6 (2023)

The rapidly increasing statistical power of cosmological imaging surveys requires us to reassess the regime of validity for various approximations that accelerate the calculation of relevant theoretical predictions. In this paper, we present the resu

Externí odkaz: https://doaj.org/article/10f404047c5846328e5d4d4b8c76f224

Minkowski Functionals in Joint Galaxy Clustering & Weak Lensing Analyses

Autor: Nisha Grewal, Joe Zuntz, Tilman Tröster, Alexandra Amon

Publikováno v: The Open Journal of Astrophysics, Vol 5 (2022)

We investigate the inclusion of clustering maps in a weak lensing Minkowski functional (MF) analysis of DES-like and LSST-like simulations to constrain cosmological parameters. The standard 3x2pt approach to lensing and clustering data uses two-point

Externí odkaz: https://doaj.org/article/9f0c085db9ed467d9acdbc4b6cdc9d89

KiDS-1000: cross-correlation with Planck cosmic microwave background lensing and intrinsic alignment removal with self-calibration

Autor: Ji Yao, Huanyuan Shan, Pengjie Zhang, Xiangkun Liu, Catherine Heymans, Benjamin Joachimi, Marika Asgari, Maciej Bilicki, Hendrik Hildebrandt, Konrad Kuijken, Tilman Tröster, Jan Luca van den Busch, Angus Wright, Ziang Yan

Galaxy shear - cosmic microwave background (CMB) lensing convergence cross-correlations contain additional information on cosmology to auto-correlations. While being immune to certain systematic effects, they are affected by the galaxy intrinsic alig

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::246c61a083ac26ac9c49402085c6afbf

On the road to per cent accuracy IV: ReACT – computing the non-linear power spectrum beyond ΛCDM

Autor: Benjamin Bose, Matteo Cataneo, Catherine Heymans, Tilman Tröster, Lucas Lombriser, Qianli Xia

Publikováno v: Monthly Notices of the Royal Astronomical Society
Bose, B, Cataneo, M, Tröster, T, Xia, Q, Heymans, C & Lombriser, L 2020, ' On the road to percent accuracy IV : ReACT--computing the non-linear power spectrum beyond ΛCDM ', Monthly Notices of the Royal Astronomical Society, vol. 498, no. 4, pp. 4650-4662 . https://doi.org/10.1093/mnras/staa2696

To effectively exploit large-scale structure surveys, we depend on accurate and reliable predictions of non-linear cosmological structure formation. Tools for efficient and comprehensive computational modelling are therefore essential to perform cosm

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::152b52f292edb408a5f1e2fde85e76d2
https://doi.org/10.1093/mnras/staa2696

Pure-mode correlation functions for cosmic shear and application to KiDS-1000

Autor: Peter Schneider, Marika Asgari, Yasaman Najafi Jozani, Andrej Dvornik, Benjamin Giblin, Joachim Harnois-Déraps, Catherine Heymans, Hendrik Hildebrandt, Henk Hoekstra, Konrad Kuijken, HuanYuan Shan, Tilman Tröster, Angus H. Wright

Publikováno v: Astronomy & Astrophysics, 664, A77

One probe for systematic effects in gravitational lensing surveys is the presence of so-called B-modes in the cosmic shear two-point correlation functions \xi_\pm(\vt), since lensing is expected to produce only E-mode shear. Furthermore, there exist

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f48d03fa1bfa3619d67890b7f37b6fad
https://ui.adsabs.harvard.edu/abs/2022A&A...664A..77S