Results 31 to 40 of about 103 (81)

Before its time: A remarkably evolved protocluster core at z = 7.88

Astronomy & Astrophysics
Protoclusters represent the most extreme environments in the very early Universe. They form from large-scale dark matter overdensities, harbouring an overabundance of galaxies fed by large gas reservoirs.
Witten Callum, Oesch Pascal A., McClymont William, Meyer Romain A., Fudamoto Yoshinobu, Sijacki Debora, Laporte Nicolas, Bennett Jake S., Simmonds Charlotte, Giovinazzo Emma, Danhaive A. Lola, Ciesla Laure, Carvajal-Bohorquez Cristian, Trebitsch Maxime   +13 more
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A NOEMA pilot survey of [C II] line emission in luminous galaxies at z  ≈  6

Astronomy & Astrophysics
We present Northern Extended Millimeter Array (NOEMA) observations of four luminous galaxies at z ∼ 6, when the Universe was less than ∼1 Gyr old. These galaxies are detected in the [C II] 158 μm fine-structure line, and three also exhibit underlying ...
Martínez-Cuadra B., Herrera-Camus R., Förster Schreiber N., Tacconi L., Genzel R., Liu D., Harikane Y., Jolly J. B., Naab T., Neri R., Tozzi G., Übler H.   +11 more
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On the Sizes of Ionized Bubbles Around Galaxies During the Reionization Epoch. The Spectral Shapes of the Lyα Emission from Galaxies

The Astrophysical Journal Letters, 2023
We develop a new method to determine the distance between a high-redshift galaxy and a foreground screen of atomic hydrogen. In a partially neutral universe, and assuming spherical symmetry, this equates to the radius of an ionized “bubble” ( R _B ...
Matthew J. Hayes, Claudia Scarlata
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SIMPLE: Simple Intensity Map Producer for Line Emission

The Astrophysical Journal, 2023
We present the Simple Intensity Map Producer for Line Emission ( Simple ), a public code for quickly simulating mock line-intensity maps, and an analytical framework for modeling intensity maps including observational effects.
Maja Lujan Niemeyer, José Luis Bernal, Eiichiro Komatsu   +2 more
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JWST Unveils the Bimodal Nature of Lyα Emitters at 3 < z < 7: Pristine versus Merger-driven Populations

The Astrophysical Journal
We present a systematic study of merging galaxies among Lyα emitters (LAEs) using James Webb Space Telescope/NIRCam high-resolution imaging data. From a large sample of 817 spectroscopically confirmed LAEs at 3  6 to 70% at z  
Jian Ren, F. S. Liu, Nan Li, Qi Song, Pinsong Zhao, Qifan Cui, Yubin Li, Hao Mo, Guanghuan Wang, Hassen M. Yesuf, Weichen Wang   +10 more
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Absorption Troughs of Lyα Emitters in HETDEX

The Astrophysical Journal
The Hobby–Eberly Telescope Dark Energy Experiment (HETDEX) is designed to detect and measure the redshifts of more than 1 million Ly α emitting galaxies (LAEs) 1.88 < z < 3.52. In addition to its cosmological measurements, these data enable studies of Ly
Laurel H. Weiss, Dustin Davis, Karl Gebhardt, Simon Gazagnes, Mahan Mirza Khanlari, Erin Mentuch Cooper, John Chisholm, Danielle Berg, William P. Bowman, Chris Byrohl, Robin Ciardullo, Maximilian Fabricius, Daniel Farrow, Caryl Gronwall, Gary J. Hill, Lindsay R. House, Donghui Jeong, Hasti Khoraminezhad, Wolfram Kollatschny, Eiichiro Komatsu, Maja Lujan Niemeyer, Shun Saito, Donald P. Schneider, Gregory R. Zeimann   +23 more
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MAMMOTH-Subaru. V. Effects of Cosmic Variance on Lyα Luminosity Functions at z = 2.2–2.3

The Astrophysical Journal
Cosmic variance introduces significant uncertainties into galaxy number density properties when surveying the high-redshift Universe with a small volume.
Ke Ma, Haibin Zhang, Zheng Cai, Yongming Liang, Nobunari Kashikawa, Mingyu Li, Yunjing Wu, Qiong Li, Xiaohui Fan, Sean D. Johnson, Masami Ouchi   +10 more
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Lyα Emission at z = 7–13: Clear Evolution of Lyα Equivalent Width Indicating a Late Cosmic Reionization History

The Astrophysical Journal
We present the evolution of Ly α emission derived from 53 galaxies at z = 6.6–13.2, which have been identified by multiple JWST/NIRSpec spectroscopy programs of Early Release Science, General Observer, Director's Discretionary Time, and Guaranteed Time ...
Minami Nakane, Masami Ouchi, Kimihiko Nakajima, Yuichi Harikane, Yoshiaki Ono, Hiroya Umeda, Yuki Isobe, Yechi Zhang, Yi Xu   +8 more
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The Lyα Nondetection by JWST NIRSpec of a Strong Lyα Emitter at z = 5.66 Confirmed by MUSE

The Astrophysical Journal
The detections of Ly α emission in galaxies with redshifts above 5 are of utmost importance for constraining the cosmic reionization timeline, yet such detections are usually based on slit spectroscopy. Here we investigate the significant bias induced by
Haochen Jiang, Xin Wang, Cheng Cheng, Xu Kong, Qianqiao Zhou, Xiao-Lei Meng, Xianlong He, Tucker Jones, Kristan Boyett   +8 more
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Lyα Radiative Transfer Modeling for 163 MUSE Lyα-emitting Galaxies at z = 3–6

The Astrophysical Journal
We utilized Ly α radiative transfer calculations from H. Song et al. to investigate the properties of extended Ly α halos around star-forming galaxies in the Hubble Ultra Deep Field, observed by the Multi-Unit Spectroscopic Explorer.
Sangeun Yu, Hyunmi Song, Kwang-Il Seon
doaj   +1 more source