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Monthly Notices of the Royal Astronomical Society, 2009 We present the results of an Eulerian adaptive mesh refinement (AMR) hydrodynamical and N-body simulation in a $ $CDM cosmology. The simulation incorporates common cooling and heating processes for primordial gas. A specific halo finder has been designed and applied in order to extract a sample of galaxy clusters directly obtained from the simulation ...
Susana Planelles, Vicent Quilis
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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
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On the Alignment of Galaxies in Clusters [PDF]
Astrophysics, 2020 9 paginas,1 figure, and 7 tables. Accepted in Astrophysics.
Juan Pablo Torres-Papaqui +1 more
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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
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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
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THE ORIENTATION OF GALAXIES IN GALAXY CLUSTERS [PDF]
The Astrophysical Journal, 2010 We present an analysis of the spatial orientations of galaxies in the 247 optically selected rich Abell clusters, having in the considered area at least 100 members. We investigated the relation between angles giving information about galaxy angular momenta and the number of members in each structure.
Piotr Flin +3 more
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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
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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
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The Astrophysical Journal, 2023 Active galactic nuclei (AGNs) are widely believed to be one of the promising acceleration sites of ultrahigh-energy cosmic rays (CRs). Essentially, AGNs are powered by the gravitational energy of matter falling into supermassive black holes. However, the
Xin-Yue Shi +3 more
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Highlights of Astronomy, 1977 AbstractClusters and groups of galaxies contain the majority of galaxies in the universe. The rich clusters, while less numerous than the many poor groups, are the densest and largest systems known, and can be easily recognized and studied even at relatively large distances.
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