Results 101 to 110 of about 60,718 (195)

sOPTICS: a modified density-based algorithm for identifying galaxy groups/clusters and brightest cluster galaxies

Monthly Notices of the Royal Astronomical Society
ABSTRACT A direct approach to studying the galaxy–halo connection is to analyse groups and clusters of galaxies that trace the underlying dark matter haloes, emphasizing the importance of identifying galaxy clusters and their associated brightest cluster galaxies (BCGs). In this work, we test and propose a robust density-based clustering
Hai-Xia Ma, Tsutomu T Takeuchi, Suchetha Cooray, Yongda Zhu   +3 more
openaire   +2 more sources

The origin of gas stripping of galaxies in group environments

Astronomy & Astrophysics
We investigate how low-mass group environments (Mvir ∼ 1012 − 13 M⊙) influence the gas content of their satellite galaxies with M* > 107 M⊙ using the NEWHORIZON2 simulation.
Rhee Jinsu, Pichon Christophe, Dubois Yohan, Yi Sukyoung K., Ko Jongwan, Sheen Yun-Kyeong, Han San, Jeon Seyoung, Jang J. K., Lee Wonki, Contini Emanuele, Lee Bumhyun, Lee Jaehyun, Kraljic Katarina, Peirani Sébastien   +14 more
doaj   +1 more source

Inferring the Mass Content of Galaxy Clusters with Satellite Kinematics and Jeans Anisotropic Modeling

The Astrophysical Journal
Satellite galaxies can be used to indicate the dynamic mass of galaxy groups and clusters. In this study, we apply the axisymmetric Jeans Anisotropic Multi-Gaussian Expansion ( JAM ) modeling to satellite galaxies in 28 galaxy clusters selected from the ...
Rui Shi, Wenting Wang, Zhaozhou Li, Ling Zhu, Alexander Smith, Shaun Cole, Hongyu Gao, Xiaokai Chen, Qingyang Li, Jiaxin Han   +9 more
doaj   +1 more source

Decoding AGN Feedback with X-arithmetic: From Morphology to Physical Mechanisms

The Astrophysical Journal
Feedback from active galactic nuclei is a key process in the evolution of massive halos in the Universe. New observational information on feedback is crucial for improving the implementation of the physics in numerical models.
Hannah McCall, Irina Zhuravleva, Eugene Churazov, Congyao Zhang, William Forman, Christine Jones, Yuan Li   +6 more
doaj   +1 more source

Exploiting Machine Learning and Disequilibrium in Galaxy Clusters to Obtain a Mass Profile

The Astrophysical Journal Letters
We use 3D k -means clustering to characterize galaxy substructure in the A2146 cluster of galaxies ( z = 0.2343). This method objectively characterizes the cluster’s substructure using projected position and velocity data for 67 galaxies within a 2.305 ...
Mark J. Henriksen, Prajwal Panda
doaj   +1 more source

Galaxy Cluster Constraints on Extensions of Modified Gravity

The Astrophysical Journal
Modified Newtonian dynamics (MOND) has achieved notable success in explaining galaxy-scale phenomena and has made several unexpected, a priori predictions that align with observations.
E. C. Diggins, D. R. Wik
doaj   +1 more source

Formation Channels of Diffuse Lights in Groups and Clusters over Time

The Astrophysical Journal
We explore the formation of the intragroup light and intracluster light, representing diffuse lights within groups and clusters, from the point that z = 1.5.
Kyungwon Chun, Jihye Shin, Jongwan Ko, Rory Smith, Jaewon Yoo   +4 more
doaj   +1 more source

Groups and clusters of galaxies.

The Astronomical Journal, 1970
openaire   +1 more source

An X-ray-emitting protocluster at z ≈ 5.7 reveals rapid structure growth. [PDF]

Nature
Bogdán Á, Schellenberger G, Li Q, Conselice CJ.   +3 more
europepmc   +1 more source

Ten common misconceptions about Galaxy (and why they are wrong!). [PDF]

PLoS Comput Biol
Bacon WA, Batut B, Srikakulam SK, Zierep P, Bretaudeau A, Grüning B, Le Corguillé G, Hecht H, Davis JY, Hotz HR, Serrano-Solano B.   +10 more
europepmc   +1 more source