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DSPS: Differentiable Stellar Population Synthesis
Andrew P. Hearin, Jonás Chaves-Montero, Alex Alarcon +2
Models of stellar population synthesis (SPS) are the fundamental tool that relates the physical properties of a galaxy to its spectral energy distribution (SED). In this paper, we…
The Outer Stellar Mass of Massive Galaxies: A Simple Tracer of Halo Mass with Scatter Comparable to Richness and Reduced Projection Effects
Song Huang, Alexie Leauthaud, Christopher Bradshaw +7
Using the weak gravitational lensing data from the Hyper Suprime-Cam Subaru Strategic Program (HSC survey), we study the potential of different stellar mass estimates in tracing ha…
Beyond Mass: Detecting Secondary Halo Properties with Galaxy-Galaxy Lensing
Enia Xhakaj, Alexie Leauthaud, Johannes Lange +3
Secondary halo properties beyond mass, such as the mass accretion rate (MAR), concentration, and the half mass scale, are essential in understanding the formation of large-scale st…
A Differentiable Model of the Assembly of Individual and Populations of Dark Matter Halos
Andrew P. Hearin, Jonás Chaves-Montero, Matthew R. Becker +1
We present a new empirical model for the mass assembly of dark matter halos. We approximate the growth of individual halos as a simple power-law function of time, where the power-l…
Surrogate modelling the Baryonic Universe II: on forward modelling the colours of individual and populations of galaxies
Jonas Chaves-Montero, Andrew Hearin
Among the properties shaping the light of a galaxy, the star formation history (SFH) is one of the most challenging to model due to the variety of correlated physical processes reg…
Five-percent measurements of the growth rate from simulation-based modelling of redshift-space clustering in BOSS LOWZ
Johannes U. Lange, Andrew P. Hearin, Alexie Leauthaud +3
We use a simulation-based modelling approach to analyse the anisotropic clustering of the BOSS LOWZ sample over the radial range to $63 \, h^{-1} \,…
Observational Measures of Halo Properties Beyond Mass
Peter Behroozi, Andrew Hearin, Benjamin P. Moster
Different properties of dark matter haloes, including growth rate, concentration, interaction history, and spin, correlate with environment in unique, scale-dependent ways. While t…
DESC DC2 Data Release Note
LSST Dark Energy Science Collaboration, Bela Abolfathi, Robert Armstrong +54
In preparation for cosmological analyses of the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST), the LSST Dark Energy Science Collaboration (LSST DESC) has created…