95 citations · 630 across the 24 of their papers we have counts for
16 papers · 1 filter
A Better Way to Define Dark Matter Haloes
Rafael Garcia, Edgar Salazar, Eduardo Rozo +5
Dark matter haloes have long been recognized as one of the fundamental building blocks of large scale structure formation models. Despite their importance -- or perhaps because of…
C2-GaMe: Classification of Cluster Galaxy Membership with Machine Learning
Daniel Farid, Han Aung, Daisuke Nagai +2
We present Classification of Cluster GAlaxy MEmbers (C-GaMe), a classification algorithm based on a suite of machine learning models that differentiates galaxies into orbiting,…
Accurate Model of the Projected Velocity Distribution of Galaxies in Dark Matter Halos
Han Aung, Daisuke Nagai, Eduardo Rozo +2
We present a percent-level accurate model of the line-of-sight velocity distribution of galaxies around dark matter halos as a function of projected radius and halo mass. The model…
Snowmass 2021 CMB-S4 White Paper
Kevork Abazajian, Arwa Abdulghafour, Graeme E. Addison +353
This Snowmass 2021 White Paper describes the Cosmic Microwave Background Stage 4 project CMB-S4, which is designed to cross critical thresholds in our understanding of the origin a…
Emulating Sunyaev-Zeldovich Images of Galaxy Clusters using Auto-Encoders
Tibor Rothschild, Daisuke Nagai, Han Aung +3
We develop a machine learning algorithm that generates high-resolution thermal Sunyaev-Zeldovich (SZ) maps of novel galaxy clusters given only halo mass and mass accretion rate. Th…
Galaxy Velocity Bias in Cosmological Simulations: Towards Percent-level Calibration
Dhayaa Anbajagane, Han Aung, August E. Evrard +8
Galaxy cluster masses, rich with cosmological information, can be estimated from internal dark matter (DM) velocity dispersions, which in turn can be observationally inferred from…
Constraining Cluster Virialization Mechanism and Cosmology using Thermal-SZ-selected clusters from Future CMB Surveys
Srinivasan Raghunathan, Nathan Whitehorn, Marcelo A. Alvarez +7
We forecast the number of galaxy clusters that can be detected via the thermal Sunyaev-Zeldovich (tSZ) signals by future cosmic microwave background (CMB) experiments, primarily th…
Shock and Splash: Gas and Dark Matter Halo Boundaries around LambdaCDM Galaxy Clusters
Han Aung, Daisuke Nagai, Erwin T. Lau
Recent advances in simulations and observations of galaxy clusters suggest that there exists a physical outer boundary of massive cluster-size dark matter haloes. In this work, we…
Measuring Cosmological Distances Using Cluster Edges as a Standard Ruler
Erika L. Wagoner, Eduardo Rozo, Han Aung +1
The line-of-sight velocity dispersion profile of galaxy clusters exhibits a "kink" corresponding to the spatial extent of orbiting galaxies. Because the spatial extent of a cluster…
Clusters Have Edges: The Projected Phase SpaceStructure of SDSS redMaPPer Clusters
Paxton Tomooka, Eduardo Rozo, Erika L. Wagoner +3
We study the distribution of line-of-sight velocities of galaxies in the vicinity of SDSS redMaPPer galaxy clusters. Based on their velocities, galaxies can be split into two categ…
The Phase Space Structure of Dark Matter Halos
Han Aung, Daisuke Nagai, Eduardo Rozo +1
The phase space structure of dark matter halos can be used to measure the mass of the halo, infer mass accretion rates, and probe the effects of modified gravity. Previous studies…
Ly Blobs from Cold Streams Undergoing Kelvin-Helmholtz Instabilities
Nir Mandelker, Frank C. van den Bosch, Daisuke Nagai +3
We present an analytic toy model for the radiation produced by the interaction between the cold streams thought to feed massive halos at high redshift and their hot CGM. We begin b…
Scatter in Sunyaev--Zel'dovich effect scaling relations explained by inter-cluster variance in mass accretion histories
Sheridan B. Green, Han Aung, Daisuke Nagai +1
X-ray and microwave cluster scaling relations are immensely valuable for cosmological analysis. However, their power is limited by astrophysical systematics that bias mass estimate…
Dynamical heating of the X-ray emitting intracluster medium: the roles of merger shocks and turbulence dissipation
Xun Shi, Daisuke Nagai, Han Aung +1
The diffuse plasma inside clusters of galaxies has X-ray emitting temperatures of a few keV. The physical mechanisms that heat this intracluster medium (ICM) to such temperatures i…
Generating Synthetic Cosmological Data with GalSampler
Andrew Hearin, Danila Korytov, Eve Kovacs +4
As part of the effort to meet the needs of the Large Synoptic Survey Telescope Dark Energy Science Collaboration (LSST DESC) for accurate, realistically complex mock galaxy catalog…
Mean maps for cosmic web structures in cosmological initial conditions
Han Aung, J. D. Cohn
Halos, filaments, sheets and voids in the cosmic web can be defined in terms of the eigenvalues of the smoothed shear tensor and a threshold . Using analytic methods, w…