Results 21 to 30 of about 182 (139)

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 HETDEX Survey Emission-line Exploration and Source Classification

The Astrophysical Journal, 2023
The Hobby–Eberly Telescope Dark Energy Experiment (HETDEX) is an untargeted spectroscopic survey that aims to measure the expansion rate of the universe at z ∼ 2.4 to 1% precision for both H ( z ) and D _A ( z ).
Dustin Davis, Karl Gebhardt, Erin Mentuch Cooper, Robin Ciardullo, Maximilian Fabricius, Daniel J. Farrow, John J. Feldmeier, Steven L. Finkelstein, Eric Gawiser, Caryl Gronwall, Gary J. Hill, Ulrich Hopp, Lindsay R. House, Donghui Jeong, Wolfram Kollatschny, Eiichiro Komatsu, Martin Landriau, Chenxu Liu, Shun Saito, Sarah Tuttle, Isak G. B. Wold, Gregory R. Zeimann, Yechi Zhang   +22 more
doaj   +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

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

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

The Lyα Reference Sample. XIV. Lyα Imaging of 45 Low-redshift Star-forming Galaxies and Inferences on Global Emission

The Astrophysical Journal Supplement Series, 2023
We present Ly α imaging of 45 low-redshift star-forming galaxies observed with the Hubble Space Telescope. The galaxies have been selected to have moderate to high star formation rates (SFRs) using far-ultraviolet (FUV) luminosity and H α equivalent ...
Jens Melinder, Göran Östlin, Matthew Hayes, Armin Rasekh, J. Miguel Mas-Hesse, John M. Cannon, Daniel Kunth, Peter Laursen, Axel Runnholm, E. Christian Herenz, Matteo Messa, Daniel Schaerer, Anne Verhamme, T. Emil Rivera-Thorsen, Lucia Guaita, Thomas Marquart, Johannes Puschnig, Alexandra Le Reste, Andreas Sandberg, Emily Freeland, Joanna Bridge   +20 more
doaj   +1 more source

The Lyman Alpha Reference Sample. VIII. Characterizing Lyman-Alpha Scattering in Nearby Galaxies

, 2017
32 pages, 51 figures, accepted to ...
Bridge, Joanna S., Hayes, Matthew, Melinder, Jens, Östlin, Göran, Gronwall, Caryl, Ciardullo, Robin, Atek, Hakim, Cannon, John M., Gronke, Max, Guaita, Lucia, Hagen, Alex, Herenz, Edmund Christian, Kunth, Daniel, Laursen, Peter, Mas-Hesse, J. Miguel, Pardy, Stephen A.   +15 more
openaire   +2 more sources

Constraints on the z  ∼  6−13 intergalactic medium from JWST spectroscopy of Lyman-alpha damping wings in galaxies

Astronomy & Astrophysics
Context. JWST provides a unique dataset for studying the earliest stages of reionisation at z > 9, promising insights into the first galaxies. Many JWST/NIRSpec prism spectra of z > 5 galaxies have revealed smooth Lyman-alpha breaks, implying damping ...
Mason Charlotte A., Chen Zuyi, Stark Daniel P., Yi Lu Ting, Topping Michael, Tang Mengtao   +5 more
doaj   +1 more source