Results 61 to 70 of about 8,368 (167)

A High Rate of Foreground Contaminants toward High-redshift Galaxies Resolved by JWST

The Astrophysical Journal
We present a study of high-redshift Ly α emitters (LAEs) with multiple components using the Hubble Space Telescope and JWST. High-redshift galaxies are mostly point-like objects on ground-based images, but they often exhibit multiple components in higher
Weiyang Liu, Linhua Jiang
doaj   +1 more source

Star-forming Galactic Contrails at z=3.2 as a Source of Metal Enrichment and Ionizing Radiation [PDF]

, 2013
A spectroscopically detected Lyman alpha emitting halo at redshift 3.216 in the GOODS-N field is found to reside at the convergence of several Lyman alpha filaments. HST images show that some of the filaments are inhabited by galaxies.
Becker, George D., Gauthier, Jean-Rene, Haehnelt, Martin G., Rauch, Michael   +3 more
core   +3 more sources

The Size Evolution and the Size–Mass Relation of Lyα Emitters across 3 ≲ z< 7 as Observed by JWST

The Astrophysical Journal
Understanding the morphological structures of Ly α emitters (LAEs) is crucial for unveiling their formation pathways and the physical origins of Ly α emission. However, the evolution of their sizes and structural scaling relations remains debated.
Qi Song, F. S. Liu, Jian Ren, Pinsong Zhao, Qifan Cui, Yubin Li, Hao Mo, Yuchong Luo, Guanghuan Wang, Nan Li, Hassen M. Yesuf, Weichen Wang, Xin Zhang, Xianmin Meng, Mingxiang Fu, Bingqing Zhang, Chenxiaoji Ling   +16 more
doaj   +1 more source

Small Region, Big Impact: Highly Anisotropic Lyman-continuum Escape from a Compact Starburst Region with Extreme Physical Properties

The Astrophysical Journal Letters, 2023
Extreme, young stellar populations are considered to be the primary contributor to cosmic reionization. How the Lyman continuum (LyC) escapes these galaxies remains highly elusive, and it is challenging to observe this process in actual LyC emitters ...
Keunho J. Kim, Matthew B. Bayliss, Jane R. Rigby, Michael D. Gladders, John Chisholm, Keren Sharon, Håkon Dahle, T. Emil Rivera-Thorsen, Michael K. Florian, Gourav Khullar, Guillaume Mahler, Ramesh Mainali, Kate A. Napier, Alexander Navarre, M. Riley Owens, Joshua Roberson   +15 more
doaj   +1 more source

Lya escape from z~0.03 star-forming galaxies: the dominant role of outflows

, 2013
The usefulness of H I Lyman-alpha photons for characterizing star formation in the distant universe is limited by our understanding of the astrophysical processes that regulate their escape from galaxies.
Leitherer, C., Salzer, J., Wofford, A.
core   +1 more source

The nature of the Lyman-alpha emission region of FDF-4691 [PDF]

, 2004
In order to study the origin of the strong Lyman-alpha emission of high-redshift starburst galaxies we observed and modeled the emission of the z = 3.304 galaxy FDF-4691 (rest-frame EW = 103 Angstroem).
Ahn, Ahn, Bouchet, C. Tapken, Calzetti, Charlot, D. Mehlert, Dawson, Heidt, Hu, I. Appenzeller, Kennicutt, Kudritzki, Kunth, Leitherer, Mas-Hesse, Mehlert, Meinköhn, Neufeld, Rhoads, Richling, S. Noll, S. Richling, Shapley, Taniguchi, Tenorio-Tagle, Van Ojik, Walborn   +27 more
core   +2 more sources

Lyman alpha emission in high-redshift galaxies

, 2007
A significant fraction of the high-redshift galaxies show strong Lyman emission lines. For redshifts z>5, most known galaxies belong to this class. However, so far not much is known about the physical structure and nature of these objects. Our aim is to analyse the Lyman alpha emission in a sample of high-redshift UV-continuum selected galaxies and ...
Tapken, C., Appenzeller, I., Noll, S., Richling, S., Heidt, J., Meinkoehn, E., Mehlert, D.   +6 more
openaire   +2 more sources

A Spectral Atlas of Lyα Emitters at z = 5.7 and z = 6.6

The Astrophysical Journal
We present two uniformly observed spectroscopic samples of Ly α emitters (LAEs; 127 at z = 5.7 and 82 at z = 6.6), which we use to investigate the evolution of the LAE population at these redshifts.
A. Songaila, L. L. Cowie, A. J. Barger, E. M. Hu, A. J. Taylor   +4 more
doaj   +1 more source

The Web Epoch of Reionization Lyα Survey (WERLS). I. MOSFIRE Spectroscopy of z ∼ 7–8 Lyα Emitters

The Astrophysical Journal
We present the first results from the Web Epoch of Reionization Ly α Survey (WERLS), a spectroscopic survey of Ly α emission using Keck I/MOSFIRE and LRIS.
Olivia R. Cooper, Caitlin M. Casey, Hollis B. Akins, Jake Magee, Alfonso Melendez, Mia Fong, Stephanie M. Urbano Stawinski, Jeyhan S. Kartaltepe, Steven L. Finkelstein, Rebecca L. Larson, Intae Jung, Ash Bista, Jaclyn B. Champagne, Óscar A. Chávez Ortiz, Sadie Coffin, M. C. Cooper, Nicole Drakos, Andreas L. Faisst, Maximilien Franco, Seiji Fujimoto, Steven Gillman, Ghassem Gozaliasl, Santosh Harish, Taylor A. Hutchison, Anton M. Koekemoer, Vasily Kokorev, Jitrapon Lertprasertpong, Daizhong Liu, Arianna S. Long, Casey Papovich, R. Michael Rich, Brant E. Robertson, Margherita Talia, Brittany N. Vanderhoof, John R. Weaver, Katherine E. Whitaker, Jorge A. Zavala   +36 more
doaj   +1 more source

Connecting Faint End Slopes of the Lyman-$\alpha$ emitter and Lyman-break Galaxy Luminosity Functions

, 2015
We predict Lyman-$\alpha$ (Ly$\alpha$) luminosity functions (LFs) of Ly$\alpha$-selected galaxies (Ly$\alpha$ emitters, or LAEs) at $z=3-6$ using the phenomenological model of Dijkstra & Wyithe (2012).
Dijkstra, Mark, Gronke, Max, Trenti, Michele, Wyithe, Stuart   +3 more
core   +1 more source