Results 111 to 120 of about 59,378 (245)

Missing black holes in brightest cluster galaxies as evidence for the occurrence of superkicks in nature [PDF]

, 2014
We investigate the consequences of superkicks on the population of supermassive black holes (SMBHs) in the Universe residing in brightest cluster galaxies (BCGs).
D. Gerosa, A. Sesana
semanticscholar   +1 more source

Reexamination of the CO Absorption Line in the M87 Nucleus

The Astrophysical Journal
We analyzed the archival Atacama Large Millimeter/submillimeter Array data of the nuclear region of M87 and evaluated the molecular gas content from the CO(2–1) absorption line.
Norita Kawanaka, Hiroshi Nagai, Yutaka Fujita   +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

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

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

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

Correlations in Relaxed Clusters of Galaxies

Open Astronomy, 2014
The correlations among different quantities in galaxy clusters, observed by Newman et al. (2013a,b), are investigated. We find an anti-correlation among the slope α, the effective radius, Re, and a correlation among the core radius rcore and Re. Moreover,
Babyk Iu., Del Popolo A.
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

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

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