Results 81 to 90 of about 90,689 (284)

The Evolution of the Galaxy Cluster Luminosity-Temperature Relation

, 2002
We analyzed the luminosity-temperature (L-T) relation for 2 samples of galaxy clusters which have all been observed by the ASCA satellite.
J. Patrick Henry, Kaiser N., Manuela Sornig, Megan C. Novicki, Sadat R., White D. A.   +5 more
core   +1 more source

ARCRAIDER II: Arc search in a sample of non-Abell clusters [PDF]

, 2010
We present a search for gravitational arcs in a sample of X-ray luminous, medium redshift clusters of galaxies. The sample of clusters is called ARCRAIDER, is based on the ROSAT Bright Survey (RBS) and fulfills the following criteria: (a) X-ray ...
A. Schwope, Bartelmann, Bolton, Bradac, Broadhurst, Dalal, Erben, Estrada, Flores, Gioia, Halkola, Hanany, Hennawi, Horesh, J. Wambsganss, Kausch, Keeton, Le Fevre, Lenzen, Li, Luppino, Lynds, Meneghetti, Oguri, Oguri, Perlmutter, Pryke, Puchwein, Reiprich, Riess, S. Schindler, Sand, Schindler, Schlegel, Schwope, Smail, Smith, Spergel, Stetson, Stocke, T. Erben, Torri, Voges, W. Kausch, Wambsganss   +44 more
core   +1 more source

Very high redshift quasars and the rapid emergence of super-massive black holes [PDF]

, 2020
The observation of quasars at very high redshift such as Pōniuā’ena is a challenge for models of supermassive black hole (SMBH) formation. This work presents a study of SMBH formation via known physical processes in starburst clusters formed at the onset
P. Kroupa, L. Šubr, T. Jeřábková, Long Wang   +3 more
semanticscholar   +1 more source

Evidence for a Redshifted Excess in the Intracluster Light Fractions of Merging Clusters at z ∼ 0.8

The Astrophysical Journal Letters
The intracluster light (ICL) fraction is a well-known indicator of the dynamical activity in intermediate-redshift clusters. Merging clusters in the redshift interval 0.18 < z < 0.56 have a distinctive peak in the ICL fractions measured between ∼3800 and
Yolanda Jiménez-Teja, Renato A. Dupke, Paulo A. A. Lopes, Paola Dimauro   +3 more
doaj   +1 more source

THE FAINT END OF THE CLUSTER-GALAXY LUMINOSITY FUNCTION AT HIGH REDSHIFT [PDF]

The Astrophysical Journal, 2012
9 pages, 4 figures, accepted for publication in the Astrophysical ...
Mancone, Conor, Baker, Troy, Gonzalez, Anthony H., Ashby, Matthew L. N., Stanford, Spencer A., Brodwin, Mark, Eisenhardt, Peter R. M., Snyder, Greg, Stern, Daniel, Wright, Edward L.   +9 more
openaire   +2 more sources

Adsorption of Helium on Cationic or Anionic Tetracene and Pentacene

Small Structures, EarlyView.
How does the arrangement of helium atoms that are adsorbed on tetracene or pentacene ions change with increasing coverage? When does the adsorption layer change from 1D to 2D, and to 3D? Is the transition abrupt? Are the helium atoms localized? Is the arrangement the same for cations and anions? What changes as the acene grows in length?
Miriam Kappe, Florent Calvo, Rasif William, Bilal Rasul, Masoomeh Mahmoodi‐Darian, Paul Scheier, Olof Echt   +6 more
wiley   +1 more source

Quantifying the Velocity Anisotropy Profile of Galaxy Clusters Using the Uchuu Cosmological Simulation

The Astrophysical Journal
Galaxy clusters are powerful laboratories for studying both cosmic structure formation and galaxy evolution. We present a comprehensive analysis of the velocity anisotropy profile, β ( r ), in galaxy clusters using the Uchuu-UniverseMachine mock galaxy ...
Mohamed H. Abdullah, Raouf H. Mabrouk, Tomoaki Ishiyama, Gillian Wilson, Magdy Y. Amin, Elamira Hend Khattab, H. I. Abdel Rahman   +6 more
doaj   +1 more source

UV–Vis Spectra of Carbonic Acid: Rationalizing Experimental Redshifts between Monomer and Bulk based on (H2CO3)n Calculations

ChemPhysChem, Volume 26, Issue 18, September 19, 2025.
In bulk carbonic acid (e.g., in interstellar icy dust grains) cluster formation produces two distinct UV‐Vis spectral features redshifted by ≈2 eV (25 nm) and by ≈5 eV (80 nm) compared to gas phase single molecule carbonic acid 's adiabatic ionization energy. Theory and experiment were used to investigate the origin of these shifts.
Dennis F. Dinu, Bastian Klein, Chaojiang Zhang, Radu A. Talmazan, Thomas Loerting, Hinrich Grothe, Ralf I. Kaiser, Maren Podewitz   +7 more
wiley   +1 more source

Modeling the Multiwavelength Detection of Protoclusters. I. An Excess of Submillimeter Galaxies in Protocluster Cores

The Astrophysical Journal
Studies of galaxy protoclusters yield insights into galaxy cluster formation complementary to those obtained via “archaeological” studies of present-day galaxy clusters.
Pablo Araya-Araya, Rachel K. Cochrane, Christopher C. Hayward, Robert M. Yates, Laerte Sodré Jr., Marcelo C. Vicentin, Douglas Rennehan, Roderik Overzier, Marcel van Daalen   +8 more
doaj   +1 more source

The High-redshift Clusters Occupied by Bent Radio AGN (COBRA) Survey: The Spitzer Catalog [PDF]

, 2016
We present 190 galaxy cluster candidates (most at high redshift) based on galaxy overdensity measurements in the Spitzer/IRAC imaging of the fields surrounding 646 bent, double-lobed radio sources drawn from the Clusters Occupied by Bent Radio AGN (COBRA)
R. Paterno-Mahler, R. Paterno-Mahler, E. Blanton, M. Brodwin, M. Ashby, E. Golden-Marx, B. Decker, J. Wing, G. Anand   +8 more
semanticscholar   +1 more source