Results 41 to 50 of about 1,021 (168)

Prospects for studying the mass and gas in protoclusters with future CMB observations [PDF]

Protoclusters are the progenitors of massive galaxy clusters. Understanding the properties of these structures is important for building a complete picture of cluster formation and for understanding the impact of environment on galaxy evolution.
Ceverino, Daniel, Raghunathan, Srinivasan, Eric Baxter, Anna Gardner, Gardner, Anna, Baxter, Eric, Cui, Weiguang, Srinivasan Raghunathan, Daniel Ceverino, Weiguang Cui   +9 more
core   +1 more source

A Mixture of LBG Overdensities in the Fields of Three 6 < z < 7 Quasars: Implications for the Robustness of Photometric Selection

The Astrophysical Journal, 2023
The most luminous quasars at z > 6 are suspected to be both highly clustered and to reside in the most massive dark matter halos in the early universe, making them prime targets to search for galaxy overdensities and/or protoclusters. We search for Lyman-
Jaclyn B. Champagne, Caitlin M. Casey, Steven L. Finkelstein, Micaela Bagley, Olivia R. Cooper, Rebecca L. Larson, Arianna S. Long, Feige Wang   +7 more
doaj   +1 more source

Ultra-Massive Galaxies in Galaxy Protoclusters at z>3 [PDF]

, 2023
In this work, we present a comprehensive study of ultra-massive galaxies (UMGs; $\log(M_{\star}/{\rm M}_\odot)>11$) in three spectroscopically-confirmed protoclusters at $z>3$ discovered by the Massive Ancient Galaxies At $z > 3$ NEar-infrared ...
McConachie, Ian
core   +1 more source

Evidence for a Massive Protocluster in S255N [PDF]

The Astronomical Journal, 2007
S255N is a luminous far-infrared source that contains many indications of active star formation but lacks a prominent near-infrared stellar cluster. We present mid-infrared through radio observations aimed at exploring the evolutionary state of this region.
Cyganowski, C. J., Brogan, C. L., Hunter, T. R.   +2 more
openaire   +2 more sources

SCUBA-2 overdensities in candidate protoclusters

, 2023
VizieR online Data Catalogue associated with article published in journal Monthly Notices of the Royal Astronomical Society with title ' SCUBA-2 overdensities associated with candidate protoclusters selected from Planck data.' (bibcode: 2020MNRAS.494 ...
Bremer, M., University of Oviedo, Greenslade, J., Dannerbauer, H., University of British Columbia, Instituto de Astrofísica de Canarias, Wang, L., University of California Irvine, Clements, D.L., European Space Astronomy Centre (ESA/ESAC), Riechers, D.A., De, Zotti G., University of South Africa, Conversi, L., Vaccari, M., Universidad de Valparaíso, Adam Mickiewicz University, Gonzalez-Nuevo, J., Ma, J., Scott, D., Instituto Universitario de Ciencias y Tecnologias Espaciales de Asturias (ICTEA), Max Planck Institut für Astronomie, Ibar, E., SRON Netherlands Institute for Space Research, INAF/Istituto di Radioastronomia, Leeuw, L., Nayyeri, H., Cairns, J., University of Bristol, University of La Laguna, Andreani, P., Cheng, T., Eales, S., Imperial College London, Temi, P., Cornell University, Valtchanov, I., Van, Kampen E., Cardiff University, European Southern Observatory, University of the Western Cape, NASA Ames Research Center, Cooray, A., Astronomy, INAF - Osservatorio Astronomico di Padova, Michalowski, M.J.   +45 more
core   +1 more source

The gravitational collapse of triaxial protoclusters [PDF]

Monthly Notices of the Royal Astronomical Society, 1986
The collapse of ellipsoids to the formation of a caustic surface is followed. The subsequent collapse of pancakes in their planes is investigated.
More, James G., Heavens, Alan F., Peacock, John A.   +2 more
openaire   +1 more source

THECHANDRADEEP PROTOCLUSTER SURVEY: EVIDENCE FOR AN ENHANCEMENT OF AGN ACTIVITY IN THE SSA22 PROTOCLUSTER ATz= 3.09 [PDF]

The Astrophysical Journal, 2009
We present results from a new ultra-deep 400 ks Chandra observation of the SSA22 protocluster at z = 3.09. We have studied the X-ray properties of 234 z ~ 3 Lyman break galaxies (LBGs; protocluster and field) and 158 z = 3.09 Ly-alpha emitters (LAEs) in SSA22 to measure the influence of the high-density protocluster environment on the accretion ...
Lehmer, B.D., Alexander, D.M., Geach, J.E., Smail, I., Basu-Zych, A., Bauer, F.E., Chapman, S.C., Matsuda, Y., Scharf, C.A., Volonteri, M., Yamada, T.   +10 more
openaire   +3 more sources

Probing the effect of the protocluster environment on galaxy morphology at z = 2.23

Astronomy & Astrophysics
Context. As galaxies evolve in dense cluster and protocluster environments, they interact and quench their star formation. This gradually transforms the dominant galaxy population from star-forming galaxies to quiescent red galaxies.
Golden-Marx E., Cai Z., Shi D., Wang X., Lemaux B. C., Vulcani B., Häußler B., Renard P., Shen L., Giddings F.   +9 more
doaj   +1 more source

Early Results from GLASS-JWST. XIV. A Spectroscopically Confirmed Protocluster 650 Million Years after the Big Bang

The Astrophysical Journal Letters, 2023
We present the spectroscopic confirmation of a protocluster at z = 7.88 behind the galaxy cluster Abell 2744 (hereafter A2744-z7p9OD). Using JWST NIRSpec, we find seven galaxies within a projected radius of 60 kpc.
Takahiro Morishita, Guido Roberts-Borsani, Tommaso Treu, Gabriel Brammer, Charlotte A. Mason, Michele Trenti, Benedetta Vulcani, Xin Wang, Ana Acebron, Yannick Bahé, Pietro Bergamini, Kristan Boyett, Marusa Bradac, Antonello Calabrò, Marco Castellano, Wenlei Chen, Gabriella De Lucia, Alexei V. Filippenko, Adriano Fontana, Karl Glazebrook, Claudio Grillo, Alaina Henry, Tucker Jones, Patrick L. Kelly, Anton M. Koekemoer, Nicha Leethochawalit, Ting-Yi Lu, Danilo Marchesini, Sara Mascia, Amata Mercurio, Emiliano Merlin, Benjamin Metha, Themiya Nanayakkara, Mario Nonino, Diego Paris, Laura Pentericci, Piero Rosati, Paola Santini, Victoria Strait, Eros Vanzella, Rogier A. Windhorst, Lizhi Xie   +41 more
doaj   +1 more source

From Clusters to Proto-Clusters: The Infrared Perspective on Environmental Galaxy Evolution

Universe, 2022
Environment is one of the primary drivers of galaxy evolution; via multiple mechanisms, it can control the critical process of transforming galaxies from star forming to quiescent, commonly termed “quenching”. Despite its importance, however, we still do
Stacey Alberts, Allison Noble
doaj   +1 more source