Results 31 to 40 of about 5,863 (203)
The Astrophysical Journal, 2023 We use large simulations of Ly α emitters with different fractions of ionized intergalactic medium to quantify the clustering of Ly α emitters as measured by the void probability function (VPF), and how it evolves under different ionization scenarios. We
Lucia A. Perez +3 more
doaj +1 more source
Early Results from GLASS-JWST. XXIII. The Transmission of Lyα from UV-faint z ∼ 3–6 Galaxies
The Astrophysical Journal, 2023 Ly α emission from galaxies can be used to trace neutral hydrogen in the epoch of reionization, however, there is a degeneracy between the attenuation of Ly α in the intergalactic medium (IGM) and the line profile emitted by the galaxy.
Gonzalo Prieto-Lyon +20 more
doaj +1 more source
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 +5 more
openaire +2 more sources
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 +22 more
doaj +1 more source
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 +4 more
openaire +1 more source
Transfert radiatif Lyman-alpha dans les galaxies
, 2008 Pour étudier la formation et l'évolution des Galaxies, nous avons développé un code de transfert radiatif des photons Lyman-alpha à travers le milieu interstellaire d'une galaxie, MCLya. Emise par les atomes d'hydrogènes excités, cette raie de résonnance
Verhamme, Anne
core +1 more source
Lyman-continuum galaxies and the escape fraction of Lyman-break galaxies
, 2014 Lyman-break galaxies (LBGs) at z ̃ 3-4 are targeted to measure the fraction of Lyman-continuum (LyC) flux that escapes from high-redshift galaxies. However, z ̃ 3-4 LBGs are identified using the Lyman-break technique which preferentially selects galaxies
C. Gonzalo Diaz (19100915) +3 more
core +1 more source
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 +20 more
doaj +1 more source
Astronomische Nachrichten, EarlyView.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 +3 more
wiley +1 more source
The relationship between Gas and Galaxies [PDF]
, 2009 We have investigated the 2D 2-point correlation function, ƐAG, between low column density Lya absorbers and galaxies at a redshift z ~ 1 for the first time.
Shone, Allen Maurice
core