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AbacusHOD: A highly efficient extended multi-tracer HOD framework and its application to BOSS and eBOSS data
Sihan Yuan, Lehman H. Garrison, Boryana Hadzhiyska +2
We introduce the AbacusHOD model and present two applications of AbacusHOD and the AbacusSummit simulations to observations. AbacusHOD is an HOD framework written in Python that is…
Modeling the galaxy-halo connection with machine learning
Ana Maria Delgado, Digvijay Wadekar, Boryana Hadzhiyska +3
To extract information from the clustering of galaxies on non-linear scales, we need to model the connection between galaxies and halos accurately and in a flexible manner. Standar…
The halo light cone catalogues of \Abacus{AbacusSummit}
Boryana Hadzhiyska, Lehman H. Garrison, Daniel Eisenstein +1
We describe a method for generating halo catalogues on the light cone using the \Abacus{AbacusSummit} suite of -body simulations. The main application of these catalogues is the…
\textsc{CompaSO}: A new halo finder for competitive assignment to spherical overdensities
Boryana Hadzhiyska, Daniel Eisenstein, Sownak Bose +2
We describe a new method (\textsc{CompaSO}) for identifying groups of particles in cosmological -body simulations. \textsc{CompaSO} builds upon existing spherical overdensity (S…
AbacusSummit: A Massive Set of High-Accuracy, High-Resolution -Body Simulations
Nina A. Maksimova, Lehman H. Garrison, Daniel J. Eisenstein +3
We present the public data release of the AbacusSummit cosmological -body simulation suite, produced with the -body code on the Summit supercomputer of the…
Constructing high-fidelity halo merger trees in AbacusSummit
Sownak Bose, Daniel J. Eisenstein, Boryana Hadzhiyska +2
Tracking the formation and evolution of dark matter haloes is a critical aspect of any analysis of cosmological -body simulations. In particular, the mass assembly of a halo and…
Galaxy assembly bias and large-scale distribution: a comparison between IllustrisTNG and a semi-analytic model
Boryana Hadzhiyska, Sonya Liu, Rachel S. Somerville +4
In this work, we compare large scale structure observables for stellar mass selected samples at , as predicted by two galaxy models, the hydrodynamical simulation IllustrisTNG…
Hefty enhancement of cosmological constraints from the DES Y1 data using a Hybrid Effective Field Theory approach to galaxy bias
Boryana Hadzhiyska, Carlos García-García, David Alonso +2
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 mo…