Results 31 to 40 of about 1,040 (235)
GLOBULAR CLUSTER SYSTEMS IN BRIGHTEST CLUSTER GALAXIES. II. NGC 6166 [PDF]
The Astrophysical Journal, 2016 ABSTRACT We present new deep photometry of the globular cluster system (GCS) around NGC 6166, the central supergiant galaxy in Abell 2199. Hubble Space Telescope data from the Advanced Camera for Surveys and WFC3 cameras in F475W and F814W are used to determine the spatial distribution of the GCS, its metallicity distribution function ...
William E. Harris +5 more
openaire +3 more sources
BRIGHTEST CLUSTER GALAXIES AND CORE GAS DENSITY IN REXCESS CLUSTERS [PDF]
The Astrophysical Journal, 2010 We investigate the relationship between brightest cluster galaxies (BCGs) and their host clusters using a sample of nearby galaxy clusters from the Representative XMM Cluster Structure Survey (REXCESS). The sample was imaged with the Southern Observatory for Astrophysical Research (SOAR) in R band to investigate the mass of the old stellar population ...
Haarsma, D. +9 more
openaire +3 more sources
A New Galaxy Cluster Merger Capable of Probing Dark Matter: A56
The Astrophysical Journal, 2023 We report the discovery of a binary galaxy cluster merger via a search of the redMaPPer optical cluster catalog, with a projected separation of 535 kpc between the brightest cluster galaxies (BCGs).
David Wittman +5 more
doaj +1 more source
Investigating the M GCS–M h Relation in the Most Massive Galaxies
The Astrophysical Journal, 2023 The relation between the total mass contained in the globular clusters of a galaxy and the mass of its dark-matter halo has been found observationally to be nearly linear over five decades of mass.
Veronika Dornan, William E. Harris
doaj +1 more source
Cluster Selection and the Evolution of Brightest Cluster Galaxies
The Astrophysical Journal, 2000 Accepted for publication in ApJL. 4 pages including 4 figures, uses emulateapj.sty (included)
Burke, D. J. +2 more
openaire +3 more sources
Advanced Science, EarlyView.A comprehensive technology platform enables high‐fidelity, volumetric MALDI imaging of 3D cell cultures by integrating custom embedding molds, a semi‐automated computational framework for 3D reconstruction, voxel‐instead of pixel‐based biomarker discovery, and immersive mixed reality data exploration.
Stefania Alexandra Iakab +16 more
wiley +1 more source
COSMIC: A Galaxy Cluster–Finding Algorithm Using Machine Learning
The Astrophysical Journal Supplement SeriesBuilding a comprehensive catalog of galaxy clusters is a fundamental task for studies on structure formation and galaxy evolution. In this paper, we present Cluster Optical Search using Machine Intelligence in Catalogs (COSMIC), an algorithm utilizing ...
Da-Chuan Tian +3 more
doaj +1 more source
Understanding shape and centroid deviations in 39 strong lensing galaxy clusters in various dynamical states [PDF]
EPJ Web of ConferencesThrough observational tests of strong lensing galaxy clusters, we can test simulation derived structure predictions that follow from Λ Cold Dark Matter (ΛCDM) cosmology.
Gassis Raven +10 more
doaj +1 more source
Advanced Intelligent Systems, EarlyView.This article proposes a lightweight YOLOv4‐based detection model using MobileNetV3 or CSPDarknet53_tiny, achieving 30+ FPS and higher mAP. It also presents a ShuffleNet‐based classification model with transfer learning and GAN‐augmented images, improving generalization and accuracy.
Qingyang Liu, Yanrong Hu, Hongjiu Liu
wiley +1 more source
Brightest Cluster Galaxy Formation in Low-Redshift Galaxy Clusters
, 2001 4 pages, 1 figure, Contribution to "Tracing Cosmic Evolution with Galaxy Clusters" (Sesto2001), ASP Conference ...
Barkhouse, Wayne A. +2 more
openaire +2 more sources