Results 1 to 10 of about 572 (187)

The JWST PEARLS View of the El Gordo Galaxy Cluster and of the Structure It Magnifies

The Astrophysical Journal, 2023
The massive galaxy cluster El Gordo ( z = 0.87) imprints multitudes of gravitationally lensed arcs onto James Webb Space Telescope Near-Infrared Camera (NIRCam) images.
Brenda L. Frye, Massimo Pascale, Nicholas Foo, Reagen Leimbach, Nikhil Garuda, Paulina Soto Robles, Jake Summers, Carlos Diaz, Patrick Kamieneski, Lukas J. Furtak, Seth H. Cohen, Jose Diego, Benjamin Beauchesne, Rogier A. Windhorst, S. P. Willner, Anton M. Koekemoer, Adi Zitrin, Gabriel Caminha, Karina I. Caputi, Dan Coe, Christopher J. Conselice, Liang Dai, Hervé Dole, Simon P. Driver, Norman A. Grogin, Kevin Harrington, Rolf A. Jansen, Jean-Paul Kneib, Matt Lehnert, James Lowenthal, Madeline A. Marshall, Felipe Menanteau, Belén Alcalde Pampliega, Nor Pirzkal, Mari Polletta, Johan Richard, Aaron Robotham, Russell E. Ryan Jr., Michael J. Rutkowski, Christóbal Sifón, Scott Tompkins, Daniel Wang, Haojing Yan, Min S. Yun   +43 more
doaj   +1 more source

ODIN: Where Do Lyα Blobs Live? Contextualizing Blob Environments within Large-scale Structure

The Astrophysical Journal, 2023
While many Ly α blobs (LABs) are found in and around several well-known protoclusters at high redshift, how they trace the underlying large-scale structure is still poorly understood. In this work, we utilize 5352 Ly α emitters (LAEs) and 129 LABs at z =
Vandana Ramakrishnan, Byeongha Moon, Sang Hyeok Im, Rameen Farooq, Kyoung-Soo Lee, Eric Gawiser, Yujin Yang, Changbom Park, Ho Seong Hwang, Francisco Valdes, Maria Celeste Artale, Robin Ciardullo, Arjun Dey, Caryl Gronwall, Lucia Guaita, Woong-Seob Jeong, Nelson Padilla, Akriti Singh, Ann Zabludoff   +18 more
doaj   +1 more source

Accelerated Structural Evolution of Galaxies in a Starbursting Cluster at z = 2.51

The Astrophysical Journal Letters, 2023
Structural properties of cluster galaxies during their peak formation epoch, z ∼ 2–4 provide key information on whether and how the environment affects galaxy formation and evolution.
Can Xu, Tao Wang, Qiusheng Gu, Anita Zanella, Ke Xu, Hanwen Sun, Veronica Strazzullo, Francesco Valentino, Raphael Gobat, Emanuele Daddi, David Elbaz, Mengyuan Xiao, Shiying Lu, Luwenjia Zhou   +13 more
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Evaluating the GeoSnap 13‐μ$$ \mu $$m cutoff HgCdTe detector for mid‐IR ground‐based astronomy

Astronomische Nachrichten, Volume 344, Issue 8-9, October-November 2023., 2023
Abstract New mid‐infrared HgCdTe (MCT) detector arrays developed in collaboration with Teledyne Imaging Sensors (TIS) have paved the way for improved 10‐μ$$ \mu $$m sensors for space‐ and ground‐based observatories. Building on the successful development of longwave HAWAII‐2RGs for space missions such as NEO Surveyor, we characterize the first 13‐μ ...
Jarron M. Leisenring, Dani Atkinson, Rory Bowens, Vincent Douence, William F. Hoffmann, Michael R. Meyer, John Auyeung, James Beletic, Mario S. Cabrera, Alexandra Z. Greenbaum, Philip Hinz, Derek Ives, William J. Forrest, Craig W. McMurtry, Judith L. Pipher, Eric Viges   +15 more
wiley   +1 more source

Unraveling the enigmatic soft x‐ray excess: Current understanding and future perspectives

Astronomische Nachrichten, Volume 344, Issue 6, August 2023., 2023
Abstract This article explores various theoretical models proposed to explain the soft x‐ray excess phenomenon, including warm Comptonization, ionized reflection models, and ionized outflowing disc winds. The soft x‐ray excess is better understood thanks to crucial observations made by ROSAT, XMM‐Newton, and eROSITA.
Thomas Boller
wiley   +1 more source

Cosmological Parameters from Planck Data in SU(2)CMB, Their Local ΛCDM Values, and the Modified Photon Boltzmann Equation

Annalen der Physik, Volume 535, Issue 7, July 2023., 2023
Implications for the cosmological model are explored of the assumption that the cosmic microwave background is subject to an SU(2) Yang– Mills theory of scale 10−4 eV rather than U(1) quantum thermodynamics. This concerns zeroth‐order (changes at high redshifts) and first‐order cosmological perturbations (changes at high and low redshifts).
Ralf Hofmann, Janning Meinert, Shyam Sunder Balaji   +2 more
wiley   +1 more source

A Gradual Decline of Star Formation since Cluster Infall: New Kinematic Insights into Environmental Quenching at 0.3 < z < 1.1

The Astrophysical Journal, 2023
The environments where galaxies reside crucially shape their star formation histories. We investigate a large sample of 1626 cluster galaxies located within 105 galaxy clusters spanning a large range in redshift (0.26 < z < 1.13). The galaxy clusters are
Keunho J. Kim, Matthew B. Bayliss, Allison G. Noble, Gourav Khullar, Ethan Cronk, Joshua Roberson, Behzad Ansarinejad, Lindsey E. Bleem, Benjamin Floyd, Sebastian Grandis, Guillaume Mahler, Michael A. McDonald, Christian L. Reichardt, Alexandro Saro, Keren Sharon, Taweewat Somboonpanyakul, Veronica Strazzullo   +16 more
doaj   +1 more source

The Three Hundred–NIKA2 Sunyaev–Zeldovich Large Program twin samples: Synthetic clusters to support real observations [PDF]

EPJ Web of Conferences, 2022
The simulation database of The Three Hundred Project has been used to pick synthetic clusters of galaxies with properties close to the observational targets of the NIKA2 camera Sunyaev–Zeldovich (SZ) Large Program.
Paliwal A., Artis E., Cui W., De Petris M., Désert F.-X., Ferragamo A., Gianfagna G., Kéruzoré F., Macías-Pérez J.-F., Mayet F., Muñoz-Echeverría M., Perotto L., Rasia E., Ruppin F., Yepes G.   +14 more
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Mapping the intracluster medium temperature in the era of NIKA2 and MUSTANG-2 [PDF]

EPJ Web of Conferences, 2022
We present preliminary results from an on-going program that aims at mapping the intracluster medium (ICM) temperature of high redshift galaxy clusters from the MaDCoWS sample using a joint analysis of shallow X-ray data obtained by Chandra and high ...
Ruppin F., Adam R., Ade P., Ajeddig H., André P., Artis E., Aussel H., Beelen A., Benoît A., Berta S., Bing L., Bourrion O., Brodwin M., Calvo M., Catalano A., Decker B., De Petris M., Désert F.-X., Doyle S., Driessen E. F. C., Eisenhardt P. R. M., Gomez A., Gonzalez A. H., Goupy J., Kéruzoré F., Kramer C., Ladjelate B., Lagache G., Leclercq S., Lestrade J.-F., Macías-Pérez J.-F., Maury A., Mauskopf P., Mayet F., McDonald M., Monfardini A., Moravec E., Muñoz-Echeverría M., Perotto L., Pisano G., Ponthieu N., Revéret V., Rigby A. J., Ritacco A., Romero C., Roussel H., Schuster K., Shu S., Sievers A., Stanford S.A., Stern D., Tucker C., Zylka R.   +52 more
doaj   +1 more source

A Large-scale Kinematic Study of Molecular Gas in High-z Cluster Galaxies: Evidence for High Levels of Kinematic Asymmetry

The Astrophysical Journal, 2023
We investigate the resolved kinematics of the molecular gas, as traced by the Atacama Large Millimeter/submillimeter Array in CO (2−1), of 25 cluster member galaxies across three different clusters at a redshift of z ∼ 1.6.
W. J. Cramer, A. G. Noble, K. Massingill, J. Cairns, D. L. Clements, M. C. Cooper, R. Demarco, J. Matharu, M. McDonald, A. Muzzin, J. Nantais, G. Rudnick, H. Übler, E. van Kampen, T. M. A. Webb, G. Wilson, H. K. C. Yee   +16 more
doaj   +1 more source