Results 1 to 10 of about 32,492 (229)

Brightest Cluster Galaxy Offsets in Cold Dark Matter [PDF]

The Open Journal of Astrophysics
The distribution of offsets between the brightest cluster galaxies of galaxy clusters and the centroid of their dark matter distributions is a promising probe of the underlying dark matter physics.
Cian Roche, Michael McDonald, Josh Borrow, Mark Vogelsberger, Xuejian Shen, Volker Springel, Lars Hernquist, Ruediger Pakmor, Sownak Bose, Rahul Kannan   +9 more
doaj   +2 more sources

ON THE DETERMINATION OF GALAXY STRUCTURE ELLIPTICITY

Odessa Astronomical Publications, 2007
We discuss factors influencing the determination of the observed shape of galaxy clusters when the covariance ellipse method is involved. The analysis of 377 Abell clusters show that at greater distances from the cluster center the ellipticity is rather ...
M. Biernacka, P. Flin, T. Juszczyk, E. Panko   +3 more
doaj   +1 more source

CLASH-VLT: The Inner Slope of the MACS J1206.2-0847 Dark Matter Density Profile

The Astrophysical Journal, 2023
The inner slope ( γ _DM ) of the dark matter (DM) density profile of cosmological halos carries information about the properties of DM and/or baryonic processes affecting the halo gravitational potential.
Andrea Biviano, Lorenzo Pizzuti, Amata Mercurio, Barbara Sartoris, Piero Rosati, Stefano Ettori, Marisa Girardi, Claudio Grillo, Gabriel B. Caminha, Mario Nonino   +9 more
doaj   +1 more source

THE DETERMINATION OF THE MORPHOLOGICAL TYPES OF GALAXY CLUSTERS USING CLUSTER CARTOGRAPHY

Odessa Astronomical Publications, 2016
We discuss the possibility of using the Cluster Cartography set for the determined the morphological types of galaxy clusters. The applied morphological scheme was proposed by Panko (2013).
E. A. Panko, S. I. Emelyanov
doaj   +1 more source

Galactic cannibalism and CDM density profiles [PDF]

, 2004
Using N-body simulations we show that the process of formation of the brightest cluster galaxy through dissipationless galactic cannibalism can affect the inner cluster dark matter density profile.
Barnes, Bartelmann, Bertin, Binney, Blumenthal, C. Nipoti, de Blok, Dehnen, Dehnen, Dubinski, El-Zant, Gavazzi, Ghigna, Gnedin, Hernquist, Jesseit, Kazantzidis, Kelson, Kochanek, L. Ciotti, Lewis, Londrillo, M. Stiavelli, Ma, Merritt, Mo, Moore, Natarajan, Navarro, Navarro, Nipoti, Nipoti, Nipoti, Ostriker, Power, Ricotti, Rosati, Salucci, Sand, Sand, Simon, Smith, Spergel, Springel, Subramanian, T. Treu, Treu, van den Bosch, Zhang   +48 more
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The JWST PEARLS View of the El Gordo Galaxy Cluster and of the Structure It Magnifies

The Astrophysical Journal, 2023
The massive galaxy cluster El Gordo ( z = 0.87) imprints multitudes of gravitationally lensed arcs onto James Webb Space Telescope Near-Infrared Camera (NIRCam) images.
Brenda L. Frye, Massimo Pascale, Nicholas Foo, Reagen Leimbach, Nikhil Garuda, Paulina Soto Robles, Jake Summers, Carlos Diaz, Patrick Kamieneski, Lukas J. Furtak, Seth H. Cohen, Jose Diego, Benjamin Beauchesne, Rogier A. Windhorst, S. P. Willner, Anton M. Koekemoer, Adi Zitrin, Gabriel Caminha, Karina I. Caputi, Dan Coe, Christopher J. Conselice, Liang Dai, Hervé Dole, Simon P. Driver, Norman A. Grogin, Kevin Harrington, Rolf A. Jansen, Jean-Paul Kneib, Matt Lehnert, James Lowenthal, Madeline A. Marshall, Felipe Menanteau, Belén Alcalde Pampliega, Nor Pirzkal, Mari Polletta, Johan Richard, Aaron Robotham, Russell E. Ryan Jr., Michael J. Rutkowski, Christóbal Sifón, Scott Tompkins, Daniel Wang, Haojing Yan, Min S. Yun   +43 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

LINEAR SUBSTRUCTURES IN GALAXY CLUSTERS

Odessa Astronomical Publications, 2019
We propose detailed scheme that is describing the morphology of linear substructures in galaxy clusters. Our base morphological scheme di- vides galaxy clusters using numerical criteria according the parameters: concentration to the cluster center, the ...
E. Panko, V. Korshunov, S. Yemelianov, V. Zabolotnii   +3 more
doaj   +1 more source

MORPHOLOGICAL TYPES OF 254 RICH PF GALAXY CLUSTERS

Odessa Astronomical Publications, 2014
We determined the morphological types for 254 rich galaxy clusters from the PF Catalogue of Galaxy Clusters and Groups. The data set contains the PF galaxy clusters, which have no ACO coinciding ones.
E. A. Panko, S. M. Andrievsky, A. V. Gotsulyak   +2 more
doaj   +1 more source

The XMM Cluster Survey: The Stellar Mass Assembly of Fossil Galaxies [PDF]

, 2012
This paper presents both the result of a search for fossil systems (FSs) within the XMM Cluster Survey and the Sloan Digital Sky Survey and the results of a study of the stellar mass assembly and stellar populations of their fossil galaxies. In total, 17
A. Kathy Romer, Andrew R. Liddle, Ben Hoyle, Bernardi, Blanton, Cavaliere, Charlot, Chris A. Collins, Christopher J. Miller, Conroy, Craig D. Harrison, Cypriano, D'Onghia, Diego Capozzi, Dubinski, E. J. Lloyd-Davies, Feldmeier, Ferland, Gastaldello, Herberich, John P. Stott, Johnston, Joseph W. Richards, Koester, La Barbera, Lauer, Lavery, Lin, Lotz, Martin Sahlén, Matt Hilton, Maughan, Mehrtens, Mendes de Oliveira, Mendes de Oliveira, Miller, Miller, Milosavljević, Mulchaey, Murante, Nicola Mehrtens, Patton, Paul-James Deadman, Pedro T. P. Viana, Quillen, Richardson, Romer, Rudick, Rudick, Rudick, Ruszkowski, S. Adam Stanford, Salim, Santos, Stott, Tremonti, Voevodkin, Voevodkin, White, Wu, York   +60 more
core   +2 more sources