Results 51 to 60 of about 739 (176)

Environmental Impacts on the Rest-frame UV Size and Morphology of Star-forming Galaxies at z ∼ 2

The Astrophysical Journal, 2023
We report the measurement of rest-frame UV size and morphology of H α -emission-selected star-forming galaxies (HAEs) in four protoclusters at z ∼ 2 (PKS 1138-262, USS 1558-003, PHz G237.0+42.5, and CC 2.2) using archival Hubble Space Telescope Advanced ...
Abdurrahman Naufal, Yusei Koyama, Rhythm Shimakawa, Tadayuki Kodama   +3 more
doaj   +1 more source

Is there enough star formation in simulated protoclusters? [PDF]

, 2021
As progenitors of the most massive objects, protoclusters are key to tracing the evolution and star formation history of the Universe, and are responsible for ≳ 20 per cent of the cosmic star formation at z, > 2.
Scott, Douglas, McCarthy, Ian, Babul, Arif, Kay, Scott; id_orcid, Rennehan, Douglas, Lim, Seunghwan, Barnes, David, Vogelsberger, Mark   +7 more
core   +4 more sources

What boost galaxy mergers in two massive galaxy protoclusters at z = 2.24 [PDF]

, 2023
Characterizing the structural properties of galaxies in high-redshift protoclusters is key to our understanding of the environmental effects on galaxy evolution in the early stages of galaxy and structure formation.
Zhang, Yuheng, Cai, Zheng, Wang, Xin, Shi, D.D., Zheng, X.Z., Zhang, Y., Cai, Z., Zheng, Xianzhong, Fan, Xiaohui, Xu, H., Qin, Jianbo, Wang, X., Pan, Zhizheng, Pan, Z., Fan, X., Shi, Dongdong, Qin, J., Liu, W., Wen, R., Liu, S., Xu, Haiguang, Yuan, Q., Wen, Run, Liu, Wenhao, Liu, Shuang, Yuan, Qirong   +25 more
core   +2 more sources

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

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  

Star Formation in SpARCS J0330: Bridging the Gap Between Protoclusters and Clusters [PDF]

, 2021
At z > 2, many studies have identified protoclusters - overdensities of galaxies spanning tens of Mpc in size and hosting some of the most vigorous star formation observed in the Universe to date. Conversely, galaxy clusters are typically observed at z <
Wilson, Gillian, McDonald, Michael, Ding, Yifan, Nantais, Julie, Clements, David, Cairns, Joseph, Noble, Allison   +6 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

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

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