Results 21 to 30 of about 210 (157)

Damped Lyman-Alpha Galaxies

, 2000
To appear in "Gas and Galaxy Evolution", ASP Conference Series, eds. Hibbard, Rupen, and van Gorkum.
Turnshek, D., Rao, S., Lane, W., Monier, E., Nestor, D., Bergeron, J., Smette, A.   +6 more
openaire   +2 more sources

On the Diffuse Lyman-alpha Halo Around Lyman-alpha Emitting Galaxies

, 2015
11 pages, 8 figures, accepted for publication in ApJ. Our conclusion is slightly updated as a result of an improved evaluation of the sky-subtraction systematics in the observed UV profile.
Lake, Ethan, Zheng, Zheng, Cen, Renyue, Sadoun, Raphael, Momose, Rieko, Ouchi, Masami   +5 more
openaire   +2 more sources

Lyman-alpha emission in star-forming galaxies

The Astrophysical Journal, 1988
IUE observations of five blue, low-metallicity, star-forming galaxies sufficiently redshifted to permit detection of Lyman-alpha are reported. The galaxies with metallicities 0.1 time solar or more have weak or absent Lyman-alpha emission. There is evidence for increasing Lyman-alpha emission with decreasing metallicity.
Lee W. Hartmann, John P. Huchra, Margaret J. Geller, Paul O'Brien, Robert Wilson   +4 more
openaire   +1 more source

The THESEUS Space Mission and the Infrared Telescope Calibration Unit

Astronomische Nachrichten, Volume 347, Issue 6, July 2026.
ABSTRACT The Transient High‐Energy Sky and Early Universe Surveyor (THESEUS) is an ESA M7 mission concept currently in Phase A, designed to exploit gamma‐ray bursts to probe the early Universe while advancing multi‐messenger and time‐domain astrophysics. To achieve its ambitious goals, THESEUS will combine wide‐band x‐ray and gamma‐ray monitors with an
András Péter Joó, Rebeka Gyöngyi Kiss, Lorenzo Amati, Bendegúz Koncz, Örs Detre, Gyula Zilizi, Zsolt Bagoly, István I. Rácz, Sándor Pintér, L. Viktor Tóth   +9 more
wiley   +1 more source

Constraints on the z ∼ 5 Star-forming Galaxy Luminosity Function From Hubble Space Telescope Imaging of an Unbiased and Complete Sample of Long Gamma-Ray Burst Host Galaxies

The Astrophysical Journal
We present rest-frame UV Hubble Space Telescope imaging of the largest and most complete sample of 23 long-duration gamma-ray burst (GRB) host galaxies between redshifts 4 and 6.
Huei Sears, Ryan Chornock, Jay Strader, Daniel A. Perley, Peter K. Blanchard, Raffaella Margutti, Nial R. Tanvir   +6 more
doaj   +1 more source

Feasibility Study for Application of Digitized Henize Mt. Wilson Michigan Southern Sky Hα$$ \boldsymbol{\alpha} $$ Survey Low‐Dispersive Spectral Plates for Searches for Anomalous and Highly Redshifted Objects

Astronomische Nachrichten, Volume 347, Issue 6, July 2026.
ABSTRACT The goal of this study is to confirm the feasibility of the use of digitized low dispersive MtWilson Michigan Southern Sky Hα$$ \alpha $$ survey astronomical photographic plates for modern astrophysical research. The detection of highly redshifted objects, such as early galaxies and quasars, is fundamental to understanding the universe's ...
Tauseef Ahmad Zafar, René Hudec, Marta Mara Merono Vidagany, Fehmi Mejri   +3 more
wiley   +1 more source

LCEz4-M1: A Lyman Continuum Emitter Candidate at z = 4.444 in the MUSE Hubble Ultra Deep Field

The Astrophysical Journal Letters
High-redshift Lyman continuum emitters (LCEs) are crucial for understanding how galaxies ionize the neutral hydrogen in the epoch of reionization. However, detected LCEs at z  >  4 are quite rare.
Shuairu Zhu, Zhen-Ya Zheng, Fuyan Bian, Fang-Ting Yuan, Chunyan Jiang, Xiaer Zhang, Ruqiu Lin, Yucheng Guo   +7 more
doaj   +1 more source

Logarithmic and Strong Coupling Models in Weyl‐Type f(Q,T)$f(Q,T)$ Gravity

Annalen der Physik, Volume 538, Issue 1, January 2026.
This work explores Weyl‐type f(Q,T) gravity using recent observational datasets — CC, Pantheon+, Union 3.0, and DESI DR2. Through MCMC analysis of logarithmic and strong coupling models, the study reveals a transition from deceleration to acceleration, quintessence‐to‐phantom dynamics, and late‐time consistency with LCDM, offering a geometry‐driven ...
Rahul Bhagat, S. K. Tripathy, B. Mishra
wiley   +1 more source

The Lyman alpha reference sample [PDF]

Astronomy & Astrophysics, 2016
25 pages, 22 figures, accepted for publication in A& ...
Duval, Florent, Östlin, Göran, Hayes, Matthew, Zackrisson, Erik, Verhamme, Anne, Orlitova, Ivana, Adamo, Angela, Guaita, Lucia, Melinder, Jens, Cannon, John M., Laursen, Peter, Rivera-Thorsen, Thoger, Herenz, E. Christian, Gruyters, Pieter, Mas-Hesse, J. Miguel, Kunth, Daniel, Sandberg, Andreas, Schaerer, Daniel, Månsson, Tore   +18 more
openaire   +4 more sources

MXDFz4.4: A LyC Emitter 250 Myr after the Epoch of Reionization and a First Test of Lyα Morphology as a Tracer of LyC Escape at High Redshift

The Astrophysical Journal
Assessing the contribution of ionizing sources to cosmic reionization is a central goal of extragalactic astrophysics. Understanding and quantifying ionizing escape remains challenging near the Epoch of Reionization. We present the highest-redshift Lyman
Ilias Goovaerts, Marc Rafelski, Alexander Beckett, Grecco Oyarzún, Annalisa Citro, Farhanul Hasan, Kalina V. Nedkova, Calum Hawcroft, Anton M. Koekemoer, Mitchell Revalski, Matthew J. Hayes, Claudia Scarlata, Ray A. Lucas, Norman A. Grogin, David V. Stark, Paolo Suin, Nor Pirzkal, Louis-Gregory Strolger   +17 more
doaj   +1 more source