Dark Quest. I. Fast and Accurate Emulation of Halo Clustering Statistics and Its Application to Galaxy Clustering [PDF]
Astrophysical Journal, 2019 We perform an ensemble of $N$-body simulations with $2048^3$ particles for 101 flat $w$CDM cosmological models sampled based on a maximin-distance Sliced Latin Hypercube Design.
Kobayashi, Yosuke +10 more
core +4 more sources
Evidence from the H3 Survey That the Stellar Halo Is Entirely Comprised of Substructure [PDF]
Astrophysical Journal, 2020 In the ΛCDM paradigm, the Galactic stellar halo is predicted to harbor the accreted debris of smaller systems. To identify these systems, the H3 Spectroscopic Survey, combined with Gaia, is gathering 6D phase-space and chemical information in the distant
R. Naidu +7 more
semanticscholar +1 more source
A Comprehensive Catalog of Dark Matter Halo Models for SPARC Galaxies [PDF]
Astrophysical Journal Supplement Series, 2020 We present rotation curve fits to 175 late-type galaxies from the Spitzer Photometry and Accurate Rotation Curves database using seven dark matter (DM) halo profiles: pseudo-isothermal, Burkert, Navarro–Frenk–White (NFW), Einasto, Di Cintio et al. (2014,
Pengfei Li +3 more
semanticscholar +1 more source
The merger that led to the formation of the Milky Way’s inner stellar halo and thick disk [PDF]
Nature, 2018 The assembly of our Galaxy can be reconstructed using the motions and chemistry of individual stars1,2. Chemo-dynamical studies of the stellar halo near the Sun have indicated the presence of multiple components3, such as streams4 and clumps5, as well as
A. Helmi +5 more
semanticscholar +1 more source
Pandemic outbreaks and food supply chains in developing countries: A case of COVID-19 in Zimbabwe
Cogent Business & Management, 2022 The COVID-19 pandemic took a devastating human and economic toll on the entire globe. Although Africa had fewer number of cases compared to all other continents, the influence of the COVID-19 pandemic on food supply chains was devastating, yet the ...
Felix Chari +3 more
doaj +1 more source
UniverseMachine: The correlation between galaxy growth and dark matter halo assembly from z = 0−10 [PDF]
Monthly notices of the Royal Astronomical Society, 2018 We present a method to flexibly and self-consistently determine individual galaxies’ star formation rates (SFRs) from their host haloes’ potential well depths, assembly histories, and redshifts.
P. Behroozi +3 more
semanticscholar +1 more source
The low density and magnetization of a massive galaxy halo exposed by a fast radio burst [PDF]
Science, 2019 Probing a galaxy halo with a radio burst Fast radio bursts (FRBs) are millisecond flashes of radio emission from distant galaxies. It has only recently become possible to locate single bursts precisely enough to determine the host galaxy. Prochaska et al.
J. Prochaska +18 more
semanticscholar +1 more source
Co-formation of the disc and the stellar halo [PDF]
, 2018 Using a large sample of Main Sequence stars with 7-D measurements supplied by Gaia and SDSS, we study the kinematic properties of the local (within ∼10 kpc from the Sun) stellar halo.
V. Belokurov +4 more
semanticscholar +1 more source
Mass and shape of the Milky Way’s dark matter halo with globular clusters from Gaia and Hubble [PDF]
Astronomy & Astrophysics, 2018 Aims. We estimate the mass of the inner (< 20 kpc) Milky Way and the axis ratio of its inner dark matter halo using globular clusters as tracers. At the same time, we constrain the distribution in phase-space of the globular cluster system around the ...
L. Posti, A. Helmi
semanticscholar +1 more source
Toward a Halo Mass Function for Precision Cosmology: The Limits of Universality [PDF]
, 2008 We measure the mass function of dark matter halos in a large set of collisionless cosmological simulations of flat ΛCDM cosmology and investigate its evolution at z≲ 2.
J. Tinker +7 more
semanticscholar +1 more source