Results 51 to 60 of about 153,040 (288)

Evidence for a Redshifted Excess in the Intracluster Light Fractions of Merging Clusters at z ∼ 0.8

The Astrophysical Journal Letters
The intracluster light (ICL) fraction is a well-known indicator of the dynamical activity in intermediate-redshift clusters. Merging clusters in the redshift interval 0.18 < z < 0.56 have a distinctive peak in the ICL fractions measured between ∼3800 and
Yolanda Jiménez-Teja, Renato A. Dupke, Paulo A. A. Lopes, Paola Dimauro   +3 more
doaj   +1 more source

Multitarget Recognition of Flower Images Based on Lightweight Deep Neural Network and Transfer Learning

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

Structures in Galaxy Clusters

, 1993
The analysis of the presence of substructures in 16 well-sampled clusters of galaxies suggests a stimulating hypothesis: Clusters could be classified as unimodal or bimodal, on the basis of to the sub-clump distribution in the {\em 3-D} space of ...
Biviano, A., Escalera, E., Girardi, M., Giuricin, G., Mardirossian, F., Mazure, A., Mezzetti, M.   +6 more
core   +2 more sources

High resolution imaging of the early-type galaxy NGC 1380: an insight into the nature of extended extragalactic star clusters [PDF]

, 2007
NGC 1380 is a lenticular galaxy located near the centre of the Fornax Cluster northeast of NGC 1399. The globular cluster system of this galaxy was previously studied only from the ground.
Chies-Santos, A. L., Pastoriza, M. G., Santiago, B. X.   +2 more
core   +2 more sources

Usage of the term provenance in LIS literature: An Annual Review of Information Science and Technology (ARIST) paper

Journal of the Association for Information Science and Technology, EarlyView.
Abstract Provenance is the story of how something has come to be. In this paper, we provide a systematic literature review to categorize the various notions of provenance in Information Sciences. The goal of this review is to paint a broader picture of the multiple uses of provenance at play and to enhance our understanding of the importance of ...
Rhiannon Bettivia, Yi‐Yun Cheng, Michael R. Gryk   +2 more
wiley   +1 more source

Modeling and Subtracting Diffuse Cluster Light in JWST Images: A Relation between the Spatial Distribution of Globular Clusters, Dwarf Galaxies, and Intracluster Light in the Lensing Cluster SMACS 0723

The Astrophysical Journal
We present a methodology for modeling and removing light from cluster galaxies and intracluster light (ICL) from James Webb Space Telescope images of gravitational lensing clusters.
Nicholas S. Martis, Ghassan T. E. Sarrouh, Chris J. Willott, Roberto Abraham, Yoshihisa Asada, Maruša Bradač, Gabriel B. Brammer, Guillaume Desprez, Anishya Harshan, Adam Muzzin, Gaël Noirot, Gregor Rihtaršič, Marcin Sawicki, Victoria Strait   +13 more
doaj   +1 more source

On the Internal Absorption of Galaxy Clusters

, 2000
A study of the cores of galaxy clusters with the Einstein SSS indicated the presence of absorbing material corresponding to 1E+12 Msun of cold cluster gas, possibly resulting from cooling flows.
Allen S. W., Allen S. W., Arnaud M., Braine J., Braine J., Briel U. G., Crovisier J., Daines S. J., Edge A. C., Fabian A. C., Ferland G. J., Fukazawa Y., Hansen L., Jaffe W., Jaffe W., Jaffe W., Jaffe W., Joel N. Bregman, John S. Arabadjis, Matsumomo H., McNamara B. R., Mewe R., Mewe R., Norgaard-Nielsen H. U., O’Dea C. P., Siddiqui H., Tsai J. C., White D. A., White D. A.   +28 more
core   +2 more sources

PERICLES: A Set of Empirical Rotational Isochrones Modeled on Cool Dwarfs in Open Clusters and Wide Binaries

Astronomische Nachrichten, EarlyView.
ABSTRACT Isochrones, equal‐age curves, are widely used in astrophysics to estimate stellar ages. Classical stellar parameters are, however, very limited in their usability for main sequence stars because of their weak age‐dependence. Here, rotation period measurements provide complementary information.
David Gruner, Sydney A. Barnes
wiley   +1 more source

The Sloan Great Wall. Rich clusters

, 2010
We present the results of the study of the substructure and galaxy content of ten rich clusters of galaxies in three different superclusters of the Sloan Great Wall.
Abazajian, Adelman-McCarthy, Aguerri, Anscombe, Ashman, Bamford, Bardelli, Barrena, Belsole, Berlind, Berrier, Biviano, Blake, Blanton, Blanton, Blanton, Boschin, Boschin, Bower, Burgett, Butcher, Böhringer, Coziol, Donnelly, Dressler, Dressler, D’Agostino, E. Saar, E. Tago, E. Tempel, Einasto, Einasto, Einasto, Einasto, Einasto, Einasto, Einasto, Einasto, Einasto, Eisenstein, Eisenstein, Fraley, Gott, Huchra, Huertas-Company, Hwang, Hwang, I. Enkvist, Ihaka, J. Einasto, J. Vennik, Knebe, Knollmann, Kofman, L. J. Liivamägi, Leisch, Ligges, Lintott, Loeb, M. Einasto, Malumuth, Martínez, Masters, Merritt, Mobasher, Nichol, Niemi, Oegerle, Oegerle, Ostriker, Ouchi, P. Einasto, P. Heinämäki, P. Nurmi, P. Pihajoki, Park, Park, Plionis, Ragone-Figueroa, Rose, Ruhland, Shapiro, Skelton, Solanes, Springel, Springel, Tago, Tempel, Tinker, Tovmassian, Turner, V. J. Martínez, Venemans, Vennik, Vogeley, Watson, Whitmore, Zehavi, Zeldovich, Zheng   +99 more
core   +1 more source

RASS-SDSS galaxy cluster survey [PDF]

Astronomy & Astrophysics, 2005
17 pages, 15 figures, accepted for publication by A& ...
Popesso, P., Biviano, A., Böhringer, H., Romaniello, M., Voges, W.   +4 more
openaire   +3 more sources