Results 111 to 120 of about 29,686 (260)

High-redshift Merger-induced Bar-like Galaxies in IllustrisTNG

The Astrophysical Journal Letters
Recent discoveries made with JWST observations include a significant number of barred galaxies at high redshift. Their origin remains unclear, and their presence seems difficult to reproduce in cosmological simulations of galaxy formation and evolution ...
Ewa L. Łokas
doaj   +1 more source

The Outer Halos of Very Massive Galaxies: BCGs and their DSC in the Magneticum Simulations

Galaxies, 2017
Recent hydrodynamic cosmological simulations cover volumes up to Gpc 3 and resolve halos across a wide range of masses and environments, from massive galaxy clusters down to normal galaxies, while following a large variety of physical processes ...
Rhea-Silvia Remus, Klaus Dolag, Tadziu L. Hoffmann   +2 more
doaj   +1 more source

PEARLS: Globular Clusters and Ultracompact Dwarfs in the El Gordo Galaxies at z = 0.87

The Astrophysical Journal
JWST/NIRCam 0.9 to 2.0 μ m images reveal a population of point sources around the major galaxies in the El Gordo cluster at redshift z = 0.87. Their distribution in the color–magnitude diagrams shows a narrow sequence well separated from field-galaxy ...
William E. Harris, Marta Reina-Campos, Anton M. Koekemoer, Jessica M. Berkheimer, Timothy Carleton, Seth H. Cohen, Brenda L. Frye, Tyler R. Hinrichs, Benne W. Holwerda, Rachel Honor, Massimo Ricotti, S. P. Willner, Rogier A. Windhorst, Haojing Yan   +13 more
doaj   +1 more source

Discrepancies between JWST Observations and Simulations of Quenched Massive Galaxies at z > 3: A Comparative Study with IllustrisTNG and ASTRID

The Astrophysical Journal
Recent JWST observations have uncovered an unexpectedly large population of massive quiescent galaxies at z  > 3. Using the cosmological simulations IllustrisTNG and ASTRID , we identify analogous galaxies and investigate their abundance, formation ...
Emma Jane Weller, Fabio Pacucci, Yueying Ni, Lars Hernquist, Minjung Park   +4 more
doaj   +1 more source

Brightest cluster galaxies and the intracluster light

In this chapter, we delve into the formation and primary characteristics of two significant components within galaxy clusters: the brightest cluster galaxies (BCGs) and the intracluster light (ICL). Drawing upon recent and pertinent studies in the field, we explore the mechanisms driving their growth from high redshift to the present day, i.e., mergers
Contini, Emanuele, Yi, Sukyoung K., Jeon, Seyoung   +2 more
openaire   +2 more sources

Selecting Clusters and Protoclusters via Stellar Mass Density. II. Application to HSC-SSP Observations

The Astrophysical Journal
We present a selection of candidates of clusters and protoclusters of galaxies identified in the photometric data of the HSC-SSP Wide Public Data Release 3 (PDR3), spanning the redshift range 0.1 ≤ z ≤ 2. The selection method, detailed in Vicentin et al.,
Marcelo C. Vicentin, Laerte Sodré Jr., Michael A. Strauss, Erik V. R. de Lima, Pablo Araya-Araya   +4 more
doaj   +1 more source

A Study of Catalogued Nearby Galaxy Clusters in the SDSS-DR4: I. Cluster Global Properties

, 2007
We have selected a sample of 88 nearby (z 800$ km s$^{-1}$). However, the local environment could play a key role in galaxy evolution for low mass clusters.Comment: 19 pages, 11 figures, accepted for publication in A&
Abraham, Adami, Adelman-McCarthy, Aguerri, Aguerri, Aguerri, Aguerri, Akritas, Andreon, Andreon, Andreon, Arnaboldi, Arnaboldi, Ashman, Balogh, Balogh, Beers, Bekki, Biviano, Biviano, Biviano, Blanton, Blanton, Borgani, Butcher, Böhringer, C. Muñoz-Tuñón, Carlberg, Castro-Rodríguez, Cole, Colless, Corwin, Curtis, Danese, De Propris, De Propris, den Hartog, Dressler, Dressler, Ebeling, Ebeling, Edge, Ellingson, Fadda, Fairley, Fasano, Fujita, Gallazzi, Girardi, Girardi, Goto, Goto, Gott, Gunn, Gutiérrez, Gómez, Haines, Hilton, Hogg, Hogg, Hubble, J. A. L. Aguerri, Katgert, Katgert, Kenney, Ledlow, Lewis, Lupton, Mahdavi, Mamon, Mamon, Margoniner, Margoniner, Mastropietro, Melnick, Metevier, Miller, Moore, Moss, Mulchaey, Muriel, Oemler, Ortiz-Gil, Pier, Pisani, Poggianti, Quilis, Quintana, R. Sánchez-Janssen, Rakos, Rines, Rines, Schlegel, Shimasaku, Smail, Sodre, Solanes, Stein, Strateva, Strauss, Tammann, Voges, Xue, Yahil, York, Zabludoff   +105 more
core   +1 more source

The transformation of Spirals into S0 galaxies in the cluster environment

Frontiers in Astronomy and Space Sciences, 2015
We discuss the observational evidences of the morphological transformation of Spirals into S0 galaxies in the cluster environment exploiting two big databases of galaxy clusters: WINGS (0 ...
Mauro eD'onofrio, Paola eMarziani, Lucio eBuson   +2 more
doaj   +1 more source

Detecting Star Formation in Brightest Cluster Galaxies with GALEX

, 2010
We present the results of GALEX observations of 17 cool core (CC) clusters of galaxies. We show that GALEX is easily capable of detecting star formation in brightest cluster galaxies (BCGs) out to $z\ge 0.45$ and 50-100 kpc.
A. K. Hicks, Bell, Blanton, Cavagnolo, Cavagnolo, Cavagnolo, Donahue, Donahue, Donahue, Edge, Egami, Fabian, Gil de Paz, Gordon, Hicks, Johnson, Johnson, Leitherer, M. Donahue, Martin, McNamara, Morrissey ., O'Dea, O'Dea, Peterson, Quillen, R. Mushotzky, Rafferty, Rowan-Robinson, Sparks, Sun, Voit, Witt   +32 more
core   +1 more source

COSMIC: A Galaxy Cluster–Finding Algorithm Using Machine Learning

The Astrophysical Journal Supplement Series
Building 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, Yang Yang, Zhong-Lue Wen, Jun-Qing Xia   +3 more
doaj   +1 more source