Results 31 to 40 of about 149 (117)

Resolving dust and Lyman α emission in a lensed galaxy at the epoch of reionization with JWST/CANUCS

Astronomy & Astrophysics
Context. Lyman α (Lyα) emission is highly sensitive to dust and neutral hydrogen and is believed to be suppressed in dusty or hydrogen-rich galaxies – especially during the epoch of reionization (EoR).
Markov V., Bradač M., Estrada-Carpenter V., Desprez G., Rihtaršič G., Judež J., Tripodi R., Sawicki M., Noirot G., Martis N., Willott C., Abraham R., Asada Y., Brammer G., Matharu J., Muzzin A., Sarrouh G. T. E., Withers S., Ferrara A., Fujimoto S., Gallerani S., Goovaerts I., Harshan A.   +22 more
doaj   +1 more source

The Lyα Dependence on Nebular Properties from the HETDEX and MOSDEF Surveys

The Astrophysical Journal
Investigating the impact of galaxy properties on emergent Ly α emission is crucial for reionization studies, given the sensitivity of Ly α to neutral hydrogen.
Óscar A. Chávez Ortiz, Gene C. K. Leung, Steven L. Finkelstein, Dustin Davis, Ralph S. Sutherland, David C. Nicholls, Mabel Stephenson, Erin Mentuch Cooper, Micaela Bagley, Karl Gebhardt, Lindsay R. House, Chenxu Liu, Robin Ciardullo, Caryl Gronwall, Gary J. Hill, Daniel Farrow, Donald P. Schneider   +16 more
doaj   +1 more source

MAMMOTH-Subaru. III. Lyα Halo Identified by Stacking ∼3300 Lyα Emitters at z = 2.2–2.3

The Astrophysical Journal
In this paper, we present a Ly α halo (LAH) identified by stacking ∼3300 Ly α emitters (LAEs) at z = 2.2–2.3. We carry out imaging observations and data reduction with Subaru/Hyper Suprime-Cam.
Haibin Zhang, Zheng Cai, Yongming Liang, Ke Ma, Nobunari Kashikawa, Mingyu Li, Yunjing Wu, Qiong Li, Sean D. Johnson, Masami Ouchi, Xiaohui Fan   +10 more
doaj   +1 more source

Resolving circumgalactic gas flows around a z  ≈  3.6 quasar using MUSE and ALMA

Astronomy & Astrophysics
The formation and evolution of galaxies is regulated by the exchange of gas with the surrounding large-scale structures on circum- and intergalactic scales, yet little is known about the complex processes shaping the cycle of baryons in and out of ...
Galbiati M., Pensabene A., Cantalupo S., Travascio A., Pezzulli G., Decarli R., Dutta R., Muzahid S., Schaye J., Lazeyras T., Ledos N., Quadri G., Wang W.   +12 more
doaj   +1 more source

A Survey of Lyα Emission around Damped Lyα Absorbers at z ≈ 2 with the Keck Cosmic Web Imager

The Astrophysical Journal
We present Keck Cosmic Web Imager Ly α integral field spectroscopy of the fields surrounding 14 damped Ly α absorbers (DLAs) at z ≈ 2. Of these 14 DLAs, nine have high metallicities ([M/H] > − 0.3), and four of those nine feature a CO-emitting galaxy at ...
Grecco A. Oyarzún, Marc Rafelski, Nissim Kanekar, J. Xavier Prochaska, Marcel Neeleman, Regina A. Jorgenson   +5 more
doaj   +1 more source

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
doaj   +1 more source

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
doaj   +1 more source

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
doaj   +1 more source

Characterising Lyα damping wings at the onset of reionisation

Astronomy & Astrophysics
One of the major conundrums in contemporary extragalactic astrophysics is the apparent overabundance of a remarkable population of UV-bright galaxies at redshifts z ≳ 9.
Pollock Clara L., Heintz Kasper E., Witstok Joris, Gottumukkala Rashmi, Brammer Gabriel, Bose Sownak, Cameron Alex J., Dayal Pratika, van Dokkum Pieter, Fynbo Johan, Gelli Viola, Hayes Matthew J., Inoue Akio K., Lagos Claudia del P., Laursen Peter, Meyer Romain A., Naidu Rohan, Oesch Pascal, Rowland Lucie E., Tanvir Nial R., Tacchella Sandro, Terp Chamilla, Valentino Francesco, Walter Fabian, Weaver John, Witten Callum   +25 more
doaj   +1 more source

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
doaj   +1 more source