Hefty enhancement of cosmological constraints from the DES Y1 data using a hybrid effective field theory approach to galaxy bias

• Published in: Journal of cosmology and astroparticle physics Vol. 2021; no. 9; pp. 20 - 50
• Main Authors: Hadzhiyska, Boryana, García-García, Carlos, Alonso, David, Nicola, Andrina, Slosar, Anže
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.09.2021
• Subjects: Bias; Clustering; cosmological parameters from LSS; Covariance matrix; Dark energy; dark matter simulations; Emulators; Field theory; Galaxies; galaxy clustering; Goodness of fit; Large scale structure of the universe; Mathematical models; Parameters; Shot noise; Sky surveys (astronomy); weak gravitational lensing

We present a re-analysis of cosmic shear and galaxy clustering from first-year Dark Energy Survey data (DES Y1), making use of a Hybrid Effective Field Theory (HEFT) approach to model the galaxy-matter relation on weakly non-linear scales, initially proposed in [1]. This allows us to explore the enh...