Search Results for author: Marika Asgari

Found 3 papers, 3 papers with code

Magnification bias in galaxy surveys with complex sample selection functions

1 code implementation13 Jan 2021 Maximilian von Wietersheim-Kramsta, Benjamin Joachimi, Jan Luca van den Busch, Catherine Heymans, Hendrik Hildebrandt, Marika Asgari, Tilman Tröster, Angus H. Wright

For BOSS-like lenses, we forecast a contribution of the magnification bias to the GGL signal between the multipole moments, $\ell$, of 100 and 4600 with a cumulative signal-to-noise ratio between 0. 1 and 1. 1 for sources from the Kilo-Degree Survey (KiDS), between 0. 4 and 2. 0 for sources from the Hyper Suprime-Cam survey (HSC), and between 0. 3 and 2. 8 for ESA Euclid-like source samples.

Cosmology and Nongalactic Astrophysics

KiDS-450 + 2dFLenS: Cosmological parameter constraints from weak gravitational lensing tomography and overlapping redshift-space galaxy clustering

1 code implementation20 Jul 2017 Shahab Joudaki, Chris Blake, Andrew Johnson, Alexandra Amon, Marika Asgari, Ami Choi, Thomas Erben, Karl Glazebrook, Joachim Harnois-Deraps, Catherine Heymans, Hendrik Hildebrandt, Henk Hoekstra, Dominik Klaes, Konrad Kuijken, Chris Lidman, Alexander Mead, Lance Miller, David Parkinson, Gregory B. Poole, Peter Schneider, Massimo Viola, Christian Wolf

The complementarity of our observables allows for constraints on modified gravity degrees of freedom that are not simultaneously bounded with either probe alone, and up to a factor of three improvement in the $S_8$ constraint in the extended cosmology compared to KiDS alone.

Cosmology and Nongalactic Astrophysics

Cannot find the paper you are looking for? You can Submit a new open access paper.