Results 121 to 130 of about 2,213,777 (304)

IDCS J1433.2+3306: AN INFRARED-SELECTED GALAXY CLUSTER AT z = 1.89 [PDF]

, 2012
We report the discovery of an IR-selected galaxy cluster in the IRAC Distant Cluster Survey (IDCS). New data from the Hubble Space Telescope spectroscopically confirm IDCS J1433.2+3306 at z = 1.89 with robust spectroscopic redshifts for seven members ...
G. Zeimann, S. Stanford, S. Stanford, M. Brodwin, Anthony H. Gonzalez, G. Snyder, D. Stern, P. Eisenhardt, C. Mancone, A. Dey   +9 more
semanticscholar   +1 more source

Evolution of galaxies in clusters [PDF]

Proceedings of Baryons in Dark Matter Halos — PoS(BDMH2004), 2004
I summarize what is know about the evolution of galaxies in clusters from the observational point of view presenting results at high (z~1), intermediate (z~0.5) and low (z~0) redshifts. I comment on the comparison between observations and predictions of CDM models, highlighting the observational landmarks more relevant for this comparison, such as the ...
openaire   +3 more sources

IDCS J1426.5+3508: Cosmological implications of a massive, strong lensing cluster at Z = 1.75

, 2012
The galaxy cluster IDCS J1426.5+3508 at z = 1.75 is the most massive galaxy cluster yet discovered at z > 1.4 and the first cluster at this epoch for which the Sunyaev-Zel'Dovich effect has been observed. In this paper we report on the discovery with HST
Anthony H. Gonzalez, Arjun Dey, Ashby, Bartelmann, Bartelmann, Coe, Conor Mancone, Cosimo Fedeli, Dalal, Daniel Stern, Donahue, Eisenhardt, Eke, Enqvist, Gladders, Gonzalez, Greg Zeimann, Hennawi, Huang, Komatsu, Lee, Mark Brodwin, Meylan, Mullis, Navarro, Oguri, Peter R. M. Eisenhardt, Reddy, S. Adam Stanford, Tinker, Wambsganss, Wambsganss, Williamson, Wu, Zwicky   +34 more
core   +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

Towards the first mean pressure profile estimate with the NIKA2 Sunyaev-Zeldovich Large Program [PDF]

EPJ Web of Conferences
High-resolution mapping of the hot gas in galaxy clusters is a key tool for cluster-based cosmological analyses. Taking advantage of the NIKA2 millimeter camera operated at the IRAM 30-m telescope, the NIKA2 SZ Large Program seeks to get a high ...
Hanser C., Adam R., Ade P., Ajeddig H., André P., Artis E., Aussel H., Bartalucci I., Beelen A., Benoît A., Berta S., Bing L., Bourrion O., Calvo M., Catalano A., De Petris M., Désert F.-X., Doyle S., Driessen E.F.C., Ejlali G., Ferragamo A., Gomez A., Goupy J., Katsioli S., Kéruzoré F., Kramer C., Ladjelate B., Lagache G., Leclercq S., Lestrade J.-F., Macías-Pérez J.F., Madden S.C., Maury A., Mauskopf P., Mayet F., Monfardini A., Moyer-Anin A., Muñoz-Echeverría M., Paliwal A., Payerne C., Perotto L., Pisano G., Pointecouteau E., Ponthieu N., Pratt G. W., Revéret V., Rigby A.J., Ritacco A., Romero C., Roussel H., Ruppin F., Schuster K., Sievers A., Tucker C.   +53 more
doaj   +1 more source

A weak lensing mass reconstruction of the large‐scale filament feeding the massive galaxy cluster MACS J0717.5+3745 [PDF]

, 2012
We report the first weak lensing detection of a large-scale filament funnelling matter on to the core of the massive galaxy cluster MACS J0717.5+3745.
M. Jauzac, E. Jullo, J. Kneib, H. Ebeling, A. Leauthaud, Cheng-Jiun Ma, M. Limousin, R. Massey, J. Richard   +8 more
semanticscholar   +1 more source

The JWST Discovery of the Triply Imaged Type Ia “Supernova H0pe” and Observations of the Galaxy Cluster PLCK G165.7+67.0

The Astrophysical Journal
A Type Ia supernova (SN) at z = 1.78 was discovered in James Webb Space Telescope Near Infrared Camera imaging of the galaxy cluster PLCK G165.7+67.0 (G165; z = 0.35).
Brenda L. Frye, Massimo Pascale, Justin Pierel, Wenlei Chen, Nicholas Foo, Reagen Leimbach, Nikhil Garuda, Seth H. Cohen, Patrick S. Kamieneski, Rogier A. Windhorst, Anton M. Koekemoer, Pat Kelly, Jake Summers, Michael Engesser, Daizhong Liu, Lukas J. Furtak, Maria del Carmen Polletta, Kevin C. Harrington, S. P. Willner, Jose M. Diego, Rolf A. Jansen, Dan Coe, Christopher J. Conselice, Liang Dai, Hervé Dole, Jordan C. J. D’Silva, Simon P. Driver, Norman A. Grogin, Madeline A. Marshall, Ashish K. Meena, Mario Nonino, Rafael Ortiz III, Nor Pirzkal, Aaron Robotham, Russell E. Ryan Jr., Lou Strolger, Scott Tompkins, Christopher N. A. Willmer, Haojing Yan, Min S. Yun, Adi Zitrin   +40 more
doaj   +1 more source

TOWARD UNBIASED GALAXY CLUSTER MASSES FROM LINE-OF-SIGHT VELOCITY DISPERSIONS [PDF]

, 2012
We study the use of red-sequence-selected galaxy spectroscopy for unbiased estimation of galaxy cluster masses by using a publicly available simulated galaxy catalog.
A. Saro, J. Mohr, G. Bazin, K. Dolag
semanticscholar   +1 more source

Cluster Physics with Merging Galaxy Clusters

Frontiers in Astronomy and Space Sciences, 2016
Collisions between galaxy clusters provide a unique opportunity to study matter in a parameter space which cannot be explored in our laboratories on Earth.
Sandor M. Molnar
doaj   +1 more source

COSMOLOGICAL MAGNETOHYDRODYNAMIC SIMULATIONS OF GALAXY CLUSTER RADIO RELICS: INSIGHTS AND WARNINGS FOR OBSERVATIONS [PDF]

, 2012
Non-thermal radio emission from cosmic-ray electrons in the vicinity of merging galaxy clusters is an important tracer of cluster merger activity, and is the result of complex physical processes that involve magnetic fields, particle acceleration, gas ...
S. Skillman, Haoting Xu, E. Hallman, B. O’Shea, J. Burns, Hui Li, D. Collins, M. Norman   +7 more
semanticscholar   +1 more source