Results 111 to 120 of about 2,756,668 (275)

Constraining Galaxy Formation Models with Dwarf Ellipticals in Clusters

, 2005
Recent observations demonstrate that dwarf elliptical (dE) galaxies in clusters, despite their faintness, are likely a critical galaxy type for understanding the processes behind galaxy formation.
Conselice, Christopher J.
core   +2 more sources

Explaining the entropy excess in clusters and groups of galaxies without additional heating [PDF]

, 2000
The X-ray luminosity and temperature of clusters and groups of galaxies do not scale in a self-similar manner. This has often been interpreted as a sign that the intracluster medium has been substantially heated by non-gravitational sources.
Adami C., Bower R. G., Greg L. Bryan, Navarro J. F., Schindler S., Thomas P. A., Valageas P.   +6 more
core   +2 more sources

A SYSTEMATIC SEARCH FOR X-RAY CAVITIES IN GALAXY CLUSTERS, GROUPS, AND ELLIPTICAL GALAXIES [PDF]

, 2016
We perform a comprehensive study of X-ray cavities using a large sample of X-ray targets selected from the Chandra archive. The sample is selected to cover a large dynamic range including galaxy clusters, groups, and individual galaxies. Using β-modeling
Jaejin Shin, J. Woo, J. Mulchaey
semanticscholar   +1 more source

Human flaws and logical tools in engineering

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract This paper explores the limitations of human cognition, especially in engineering research, emphasizing the need for mathematical models and methods to guide decision‐making and theory validation. While human cognition excels in certain tasks, it is prone to biases that can distort our understanding.
André C. R. Martins
wiley   +1 more source

The FRB 20190520B Sight Line Intersects Foreground Galaxy Clusters

The Astrophysical Journal Letters, 2023
The repeating fast radio burst FRB 20190520B is an anomaly of the FRB population thanks to its high dispersion measure (DM = 1205 pc cm ^−3 ) despite its low redshift of z _frb = 0.241.
Khee-Gan Lee, Ilya S. Khrykin, Sunil Simha, Metin Ata, Yuxin Huang, J. Xavier Prochaska, Nicolas Tejos, Jeff Cooke, Kentaro Nagamine, Jielai Zhang   +9 more
doaj   +1 more source

Hot Gas in Galaxy Groups: Recent Observations

, 2012
Galaxy groups are the least massive systems where the bulk of baryons begin to be accounted for. Not simply the scaled-down versions of rich clusters following self-similar relations, galaxy groups are ideal systems to study baryon physics, which is ...
Baumgartner W H, Bower R G, Buote D A, Buote D A, Burenin R A, Bîrzan L, Cavagnolo K W, Cavagnolo K W, Cavagnolo K W, Dai X, Diehl S, Dunkley J, Dunn R J H, Eckert D, Finoguenov A, Finoguenov A, Freeland E, Fukazawa T, Gastaldello F, Giodini S, Gitti M, Gonzalez A H, Helsdon S F, Humphrey P J, Humphrey P J, Humphrey P J, Koester B P, Komatsu E, Komiyama M, Leauthaud A, Leauthaud A, Lin Y T, Lin Y T, Lueker M, M Sun, Mahdavi A, Maughan B J, McCarthy I G, McDonald M, McNamara B R, Motl P M, Mulchaey J S, Murakami H, Nagai D, O'Hara T B, O'Sullivan E, Puchwein E, Rafferty D A, Randall S W, Rasia E, Rasmussen J, Reichardt C L, Renzini A, Rozo E, Rozo E, Rykoff E S, Sato K, Sehgal N, Shaw L D, Shirokoff E, Sun M, Sun M, Sun M, Sun M, Sun M, Tonry J L, Trac H, Vikhlinin A, Vikhlinin A, Vikhlinin A, von der Linden A, Wetzel A R Tinker J L Conroy C   +71 more
core   +1 more source

A review of multiscale numerical modeling of rock mechanics and rock engineering

Deep Underground Science and Engineering, EarlyView.
Multiscale numerical methods of rock mechanics and rock engineering are reviewed, and the review results show that more attention should be paid to the development of an advanced constitutive model in addition to numerical techniques themselves. Abstract Rock is geometrically and mechanically multiscale in nature, and the traditional phenomenological ...
Xindong Wei, Zhe Li, Gaofeng Zhao
wiley   +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

Mind the Gap: Tightening the Mass-Richness Relation with Magnitude Gaps [PDF]

, 2013
We investigate the potential to improve optical tracers of cluster mass by exploiting measurements of the magnitude gap, m12, defined as the difference between the r-band absolute magnitude of the two brightest cluster members.
Abazajian, Allen, Andreas A. Berlind, Andrew P. Hearin, Andrew R. Zentner, Becker, Behroozi, Berlind, Blanton, Conroy, D'Onghia, Gladders, Hearin, Jeffrey A. Newman, Jones, Klypin, Koester, Kravtsov, Newman, Paranjape, Proctor, Reyes, Riebe, Rozo, Rozo, Rykoff, Skibba, Tinker, Trujillo-Gomez, Watson, Weinberg, Wu, Yang, Zentner   +33 more
core   +1 more source

Discovering Large-scale Structure at 2 < z < 5 in the C3VO Survey

The Astrophysical Journal
The Charting Cluster Construction with VUDS and ORELSE (C3VO) survey is an ongoing imaging and spectroscopic campaign aiming to map out the growth of structure up to z  ∼ 5 and was born from the combination of the Visible Multi-Object Spectrograph Ultra ...
Denise Hung, Brian C. Lemaux, Olga Cucciati, Ben Forrest, Ekta A. Shah, Roy R. Gal, Finn Giddings, Derek Sikorski, Emmet Golden-Marx, Lori M. Lubin, Nimish Hathi, Giovanni Zamorani, Lu Shen, Sandro Bardelli, Letizia P. Cassarà, Gabriella De Lucia, Fabio Fontanot, Bianca Garilli, Lucia Guaita, Michaela Monika Hirschmann, Kyoung-Soo Lee, Andrew B. Newman, Vandana Ramakrishnan, Daniela Vergani, Lizhi Xie, Elena Zucca   +25 more
doaj   +1 more source