Results 91 to 100 of about 336 (182)

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

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
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Environmental Imprints on the Assembly of the Cool Gas around Bright Cluster Galaxies

The Astrophysical Journal Letters
Galaxy clusters represent extreme cosmic laboratories where environmental processes dramatically reshape their constituent galaxies, yet their effect on the gaseous halos of central galaxies remains poorly constrained.
Runyu Zhu, Hu Zou, Taotao Fang, Enci Wang, Zeyu Chen, Zhaobin Chen, Weiyu Ding, Jinfu Gou, Weijian Guo, Niu Li, Wenxiong Li, Shufei Liu, Haoming Song, Jipeng Sui, Xi Tan, Yunao Xiao, Jingyi Zhang   +16 more
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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
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Evolution of the Brightest Cluster Galaxies [PDF]

, 2016
In this thesis, I explore the evolution of the brightest cluster galaxies (BCGs) over the last 10 billion years through detailed studies of both local BCGs from SDSS and their high-z progenitors from CANDELS UDS.\ud \ud First, I study a large sample of local BCGs and link their morphologies to their structural properties.
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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
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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
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Precision MARS Mass Reconstruction of A2744: Synergizing the Largest Strong-lensing and Densest Weak-lensing Data Sets from JWST

The Astrophysical Journal
We present a new high-resolution free-form mass model of A2744 that combines both weak-lensing (WL) and strong-lensing (SL) data sets from JWST. The SL data set comprises 286 multiple images, presenting the most extensive SL constraint to date for a ...
Sangjun Cha, Kim HyeongHan, Zachary P. Scofield, Hyungjin Joo, M. James Jee   +4 more
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Star Formation, Nebulae, and Active Galactic Nuclei in CLASH Brightest Cluster Galaxies. I. Dependence on Core Entropy of Intracluster Medium

The Astrophysical Journal
We set the stage for reassessing how star formation, emission-line nebulae, and active galactic nuclei (AGNs) in brightest cluster galaxies (BCGs) depend on the thermodynamics of the intracluster medium (ICM).
Arsen Levitskiy, Jeremy Lim, Youichi Ohyama, Juno Li, Megan Donahue   +4 more
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A distinct radial acceleration relation across the brightest cluster galaxies and galaxy clusters

Astronomy & Astrophysics
Recent studies reveal a radial acceleration relation (RAR) in galaxies, which illustrates a tight empirical correlation connecting the observational acceleration and the baryonic acceleration with a characteristic acceleration scale. However, a distinct RAR has been revealed on brightest cluster galaxy (BCG) cluster scales with a seventeen-times-larger
Yong Tian, Chung-Ming Ko, Pengfei Li, Stacy McGaugh, Shemile L. Poblete   +4 more
openaire   +2 more sources