Results 121 to 130 of about 29,694 (211)

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

Radio Galaxy Zoo: The Distortion of Radio Galaxies by Galaxy Clusters

, 2019
We study the impact of cluster environment on the morphology of a sample of 4304 extended radio galaxies from Radio Galaxy Zoo. A total of 87% of the sample lies within a projected 15 Mpc of an optically identified cluster.
Andernach, Heinz, de Gasperin, Francesco, Garon, Avery F., Jones, Tom W., Kapińska, Anna D., Kim, Jin-Ah, Norris, Ray P., Rudnick, Lawrence, Shabala, Stanislav S., Tang, Hongming, Tate, Jean, Wong, O. Ivy   +11 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

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
doaj   +1 more source

Major Mergers Mean Major Offset: Drivers of Intrinsic Scatter in the MGCS–Mh Scaling Relation for Massive Elliptical Galaxies

The Astrophysical Journal
In this work, we determine the total globular cluster (GC) counts and globular cluster system (GCS) total mass estimates for 27 extremely massive elliptical galaxies.
Veronika Dornan, William E. Harris
doaj   +1 more source

The Relationships between Active Galactic Nucleus Power and Molecular Gas Mass within 500 pc of the Center of Elliptical Galaxies

The Astrophysical Journal
The physical quantity that directly controls the feedback of active galactic nuclei (AGNs) in elliptical galaxies remains to be determined. The discovery of molecular gas around the AGNs suggests that the gas is fueling the AGNs.
Yutaka Fujita, Takuma Izumi, Hiroshi Nagai, Nozomu Kawakatu, Norita Kawanaka   +4 more
doaj   +1 more source

The Manhattan Suite: Accelerated Galaxy Evolution in the Early Universe

The Astrophysical Journal
Observational advances have allowed the detection of galaxies, protoclusters, and galaxy clusters at higher and higher redshifts, opening a new view into extreme galaxy evolution.
Douglas Rennehan
doaj   +1 more source

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
doaj   +1 more source

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

Spectroscopic and X-ray Modeling of the Strong Lensing Galaxy Cluster MACS J0138.0-2155

The Open Journal of Astrophysics
We model the total mass and galactic substructure in the strong lensing galaxy cluster MACS J0138.0-2155 using a combination of Chandra X-ray data, Multi-Unit Spectroscopic Explorer (MUSE) spectroscopy, and Hubble Space Telescope imaging.
Abigail Flowers, Jackson H. O'Donnell, Tesla E. Jeltema, Vernon Wetzell, M. Grant Roberts   +4 more
doaj   +1 more source