Results 31 to 40 of about 2,272 (184)

Reionization and the ISM/Stellar Origins with JWST and ALMA (RIOJA): The Core of the Highest-redshift Galaxy Overdensity at z = 7.88 Confirmed by NIRSpec/JWST

The Astrophysical Journal Letters, 2023
The protoclusters in the epoch of reionization, traced by galaxy overdensity regions, are ideal laboratories for studying the process of stellar assembly and cosmic reionization.
T. Hashimoto, J. Álvarez-Márquez, Y. Fudamoto, L. Colina, A. K. Inoue, Y. Nakazato, D. Ceverino, N. Yoshida, L. Costantin, Y. Sugahara, A. Crespo Gómez, C. Blanco-Prieto, K. Mawatari, S. Arribas, R. Marques-Chaves, M. Pereira-Santaella, T. J. L. C. Bakx, M. Hagimoto, T. Hashigaya, H. Matsuo, Y. Tamura, M. Usui, Y. W. Ren   +22 more
doaj   +1 more source

Herschel protocluster survey: a search for dusty star-forming galaxies in protoclusters atz= 2–3 [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
We present a Herschel/SPIRE survey of three protoclusters at z=2-3 (2QZCluster, HS1700, SSA22). Based on the SPIRE colours (S350/S250 and S500/S350) of 250 $μ$m sources, we selected high redshift dusty star-forming galaxies potentially associated with the protoclusters. In the 2QZCluster field, we found a 4-sigma overdensity of six SPIRE sources around
Kato, Y., Matsuda, Y., Smail, I., Swinbank, A.M., Hatsukade, B., Umehata, H., Tanaka, I., Saito, T., Iono, D., Tamura, Y., Kohno, K., Erb, D.K., Lehmer, B.D., Geach, J.E., Steidel, C.C., Alexander, D.M., Yamada, T., Hayashino, T.   +17 more
openaire   +4 more sources

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

Large scale structure around a z=2.1 cluster [PDF]

, 2016
The most prodigious starburst galaxies are absent in massive galaxy clusters today, but their connection with large scale environments is less clear at $z\gtrsim2$.
Capak, Peter, Casey, Caitlin M., Chiang, Yi-Kuan, Cowley, Michael J., Darvish, Behnam, Hung, Chao-Ling, Kacprzak, Glenn G., Kovac, K., Lilly, Simon J., Nanayakkara, Themiya, Spitler, Lee R., Tran, Kim-Vy H., Yuan, Tiantian   +12 more
core   +5 more sources

Shadow of a Colossus: A z=2.45 Galaxy Protocluster Detected in 3D Ly-a Forest Tomographic Mapping of the COSMOS Field

, 2015
Using moderate-resolution optical spectra from 58 background Lyman-break galaxies and quasars at $z\sim 2.3-3$ within a $11.5'\times13.5'$ area of the COSMOS field ($\sim 1200\,\mathrm{deg}^2$ projected area density or $\sim 2.4\,h^{-1}\,\mathrm{Mpc ...
Fevre, Olivier Le, Font-Ribera, Andreu, Hennawi, Joseph F., Lee, Khee-Gan, Nugent, Peter E., Prochaska, J. Xavier, Rich, R. Michael, Salvato, Mara, Schlegel, David J., Stark, Casey W., Suzuki, Nao, White, Martin, Zamorani, Gianni   +12 more
core   +3 more sources

Overdensities of 24um Sources in the Vicinities of High-Redshift Radio Galaxies [PDF]

, 2012
We present a statistical study of the environments of 63 high-redshift radio galaxies (HzRGs) between redshifts ...
A. Galametz, Bertin, Best, C. De Breuck, Caputi, Carilli, Chapman, Cimatti, Croft, D. Stern, De Breuck, De Breuck, De Breuck, Doherty, Elvis, Falder, Fazio, Galametz, Galametz, Gehrels, Gillett, Hall, J. H. Mayo, J. Vernet, Kajisawa, Knopp, Kuiper, Kurk, Kurk, Lilly, Lonsdale, Macklin, Madau, Maschietto, Matsuda, Miley, Miley, N. Seymour, Overzier, Papovich, Pentericci, Pentericci, Pier, Reddy, Rieke, Rieke, Rodighiero, Seymour, Shupe, Siebenmorgen, Stern, Tanaka, Venemans, Venemans, Venemans, Venemans, Werner   +56 more
core   +3 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

Diamonds on the Hat: Globular Clusters in The Sombrero Galaxy (M104) [PDF]

, 2009
Images from the HST ACS are used to carry out a new photometric study of the globular clusters (GCs) in M104, the Sombrero galaxy. The primary focus of our study is the characteristic distribution function of linear sizes (SDF) of the GCs. We measure the
Bailin, J., Forbes, D. A., Harris, W. E., Spitler, L. R.   +3 more
core   +2 more sources

Protoclusters associated withz> 2 radio galaxies [PDF]

Astronomy & Astrophysics, 2006
[Abridged] We present the results of a large program conducted with the Very Large Telescope and Keck telescope to search for forming clusters of galaxies near powerful radio galaxies at 2.0 < z < 5.2. We obtained narrow- and broad-band images of nine radio galaxies and their surroundings.
Venemans, B. P., Rottgering, H. J. A., Miley, G. K., van Breugel, W. J. M., De Breuck, C., Kurk, J. D., Pentericci, L., Stanford, S. A., Overzier, R. A., Croft, S., Ford, H.   +10 more
openaire   +2 more sources

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