Results 21 to 30 of about 60,718 (195)

The Effect of Age on the Grouping of Open Clusters: II—Are There Old Binary Clusters?

Universe, 2022
In the present study, we continue testing the Primordial Group hypothesis (Casado 2022), which postulates that only sufficiently young open clusters can be binary or multiple, and old clusters are essentially single.
Juan Casado
doaj   +1 more source

Formation of a low-mass galaxy from star clusters in a 600-million-year-old Universe. [PDF]

Nature
Mowla L, Iyer K, Asada Y, Desprez G, Tan VYY, Martis N, Sarrouh G, Strait V, Abraham R, Bradač M, Brammer G, Muzzin A, Pacifici C, Ravindranath S, Sawicki M, Willott C, Estrada-Carpenter V, Jahan N, Noirot G, Matharu J, Rihtaršič G, Zabl J.   +21 more
europepmc   +2 more sources

THE CRITERIA FOR MORPHOLOGICAL CLASSIFICATION OF PF GALAXY CLUSTERS

Odessa Astronomical Publications, 2013
The morphological types of galaxy clusters resulting from their out ward appearance is physically related to the clusters and their member galaxies. Presented here is an adopted system of morphological types of galaxy clusters based on the Zwicky, Boutz ...
E. A. Panko
doaj   +1 more source

AEGIS: Chandra Observation of DEEP2 Galaxy Groups and Clusters [PDF]

, 2006
We present a 200 ksec Chandra observation of seven spectroscopically selected, high redshift (0.75 < z < 1.03) galaxy groups and clusters discovered by the DEEP2 Galaxy Redshift Survey in the Extended Groth Strip (EGS). X-ray emission at the locations of
Alison L. Coil, Bower R. G., Brian F. Gerke, Darren J. Croton, David C. Koo, David S. Davis, Elise S. Laird, Jeffrey A. Newman, Kirpal Nandra, Marc Davis, Michael C. Cooper, Renbin Yan, Taotao Fang, White D. A.   +13 more
core   +2 more sources

DETAILED MORPHOLOGY OF THE RICH CONCENTRATED GALAXY CLUSTERS

Odessa Astronomical Publications, 2018
The results of the detailed analysis of the 2D distribution of galaxies in 28 rich galaxy clusters with significant concentration to the cluster center are present.
E. Panko, A. Sirginava, A. Stepaniuk
doaj   +1 more source

An inventory of galaxies in cosmic filaments feeding galaxy clusters: galaxy groups, backsplash galaxies, and pristine galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2021
ABSTRACT Galaxy clusters grow by accreting galaxies from the field and along filaments of the cosmic web. As galaxies are accreted they are affected by their local environment before they enter (pre-processing), and traverse the cluster potential.
Ulrike Kuchner, Roan Haggar, Alfonso Aragón-Salamanca, Frazer R Pearce, Meghan E Gray, Agustín Rost, Weiguang Cui, Alexander Knebe, Gustavo Yepes   +8 more
openaire   +4 more sources

Evidence for AGN Feedback in Galaxy Clusters and Groups

Advances in Astronomy, 2012
The current generation of flagship X-ray missions, Chandra and XMM-Newton, has changed our understanding of the so-called “cool-core” galaxy clusters and groups.
Myriam Gitti, Fabrizio Brighenti, Brian R. McNamara   +2 more
doaj   +1 more source

ФОРМЫ ТРЕХКОМПОНЕНТНЫХ СВЕРХСКОПЛЕНИЙ ГАЛАКТИК

Odessa Astronomical Publications, 2011
We analyzed the shapes of galaxy superclusters, contains only 3 galaxy clusters. The superclusters were found using PF Catalogue Galaxy Clusters and Groups covering 5000 square degrees as input data.
Е. А. Панько
doaj   +1 more source

A Census of Baryons in Galaxy Clusters and Groups [PDF]

, 2007
We determine the contribution of stars in galaxies, intracluster stars, and the intracluster medium to the total baryon budget in nearby galaxy clusters and groups. We find that the baryon mass fraction (f_b) within r500 is constant for systems with M500
Gonzalez, Anthony H., Zabludoff, Ann I., Zaritsky, Dennis   +2 more
core   +1 more source

Galaxy and cluster biasing from Local Group dynamics [PDF]

Monthly Notices of the Royal Astronomical Society, 2000
Comparing the gravitational acceleration induced on the Local Group of galaxies by different tracers of the underline density field we estimate, within the linear gravitational instability theory and the linear biasing ansatz, their relative bias factors. Using optical SSRS2 galaxies, IRAS (PSCz) galaxies and Abell/ACO clusters, we find b_{O,I} ~ 1.21 +
Plionis, M., Basilakos, S., Rowan-Robinson, M., Maddox, S.J., Oliver, S.J., Keeble, O., Saunders, W.   +6 more
openaire   +3 more sources