The FLAMINGO project: cosmological hydrodynamical simulations for large-scale structure and galaxy cluster surveys [PDF]
Monthly notices of the Royal Astronomical Society, 2023 We introduce the Virgo Consortium’s FLAMINGO suite of hydrodynamical simulations for cosmology and galaxy cluster physics. To ensure the simulations are sufficiently realistic for studies of large-scale structure, the subgrid prescriptions for stellar ...
J. Schaye +19 more
semanticscholar +1 more source
Cosmological implications of the anisotropy of ten galaxy cluster scaling relations [PDF]
Astronomy & Astrophysics, 2021 The hypothesis that the late Universe is isotropic and homogeneous is adopted by most cosmological studies, including studies of galaxy clusters. The cosmic expansion rate H0 is thought to be spatially constant, while bulk flows are often presumed to be ...
K. Migkas +7 more
semanticscholar +1 more source
Probing cosmic isotropy with a new X-ray galaxy cluster sample through the LX–T scaling relation [PDF]
Astronomy & Astrophysics, 2020 The isotropy of the late Universe and consequently of the X-ray galaxy cluster scaling relations is an assumption greatly used in astronomy. However, within the last decade, many studies have reported deviations from isotropy when using various ...
K. Migkas +5 more
semanticscholar +1 more source
Spectroscopic confirmation of a mature galaxy cluster at a redshift of 2 [PDF]
Nature, 2020 Galaxy clusters are the most massive virialized structures in the Universe and are formed through the gravitational accretion of matter over cosmic time1. The discovery2 of an evolved galaxy cluster at redshift z = 2, corresponding to a look-back time of
J. Willis +9 more
semanticscholar +1 more source
Discovery of a Giant Radio Fossil in the Ophiuchus Galaxy Cluster [PDF]
Astrophysical Journal, 2020 The Ophiuchus galaxy cluster exhibits a curious concave gas density discontinuity at the edge of its cool core. It was discovered in the Chandra X-ray image by Werner and collaborators, who considered the possibility of it being a boundary of an active ...
S. Giacintucci +6 more
semanticscholar +1 more source
The Galaxy Cluster Mass Scale and Its Impact on Cosmological Constraints from the Cluster Population [PDF]
Space Science Reviews, 2019 The total mass of a galaxy cluster is one of its most fundamental properties. Together with the redshift, the mass links observation and theory, allowing us to use the cluster population to test models of structure formation and to constrain cosmological
G. Pratt +7 more
semanticscholar +1 more source
Introducingromulusc: a cosmological simulation of a galaxy cluster with an unprecedented resolution [PDF]
Monthly notices of the Royal Astronomical Society, 2018 We present the first results from RomulusC, the highest resolution cosmological hydrodynamic simulation of a galaxy cluster run to date. RomulusC, a zoom-in simulation of a halo with $z=0$ mass $10^{14}$ M$_{\odot}$, is run with the same sub-grid physics
M. Tremmel +8 more
semanticscholar +1 more source
A Deep Learning Approach to Galaxy Cluster X-Ray Masses [PDF]
Astrophysical Journal, 2018 We present a machine-learning (ML) approach for estimating galaxy cluster masses from Chandra mock images. We utilize a Convolutional Neural Network (CNN), a deep ML tool commonly used in image recognition tasks.
M. Ntampaka +12 more
semanticscholar +1 more source
Cluster-counterpart Voids: Void Identification from Galaxy Density Field
The Astrophysical Journal, 2023 We identify cosmic voids from galaxy density fields under the theory of void–cluster correspondence. We extend the previous novel void-identification method developed for the matter density field to the galaxy density field for practical applications ...
Junsup Shim +3 more
doaj +1 more source
The formation of ultradiffuse galaxies in the RomulusC galaxy cluster simulation
, 2020 We study the origins of 122 ultra-diffuse galaxies (UDGs) in the {\sc RomulusC} zoom-in cosmological simulation of a galaxy cluster (M$_{200} = 1.15\times10^{14}$ M$_{\odot}$), one of the only such simulations capable of resolving the evolution and ...
M. Tremmel +5 more
semanticscholar +1 more source