Results 41 to 50 of about 8,408 (187)
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
The Dynamical Masses, Densities, and Star Formation Scaling Relations of Lyman Alpha Galaxies
, 2013 We present the first dynamical mass measurements for Lyman alpha galaxies at high redshift, based on velocity dispersion measurements from rest-frame optical emission lines and size measurements from HST imaging, for a sample of nine galaxies drawn from ...
Finkelstein, Steven L. +6 more
core +1 more source
Hubble Space Telescope Imaging of Lyman Alpha Emission at z=4.4 [PDF]
, 2010 We present the highest redshift detections of resolved Lyman alpha emission, using Hubble Space Telescope/ACS F658N narrowband-imaging data taken in parallel with the Wide Field Camera 3 Early Release Science program in the GOODS CDF-S.
Abhijit Saha +62 more
core +2 more sources
On the Diffuse Lyman-alpha Halo Around Lyman-alpha Emitting Galaxies
, 2015 Ly$ $ photons scattered by neutral hydrogen atoms in the circumgalactic media or produced in the halos of star-forming galaxies are expected to lead to extended Ly$ $ emission around galaxies. Such low surface brightness Ly$ $ halos (LAHs) have been detected by stacking Ly$ $ images of high-redshift star-forming galaxies.
Lake, Ethan +5 more
openaire +2 more sources
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
Lyman-alpha and CIII] Emission in z=7-9 Galaxies: Accelerated Reionization Around Luminous Star Forming Systems? [PDF]
, 2016 We discuss new Keck/MOSFIRE spectroscopic observations of four luminous galaxies at z~7-9 selected to have intense optical line emission by Roberts-Borsani et al. (2016). Previous follow-up has revealed Lyman-alpha in two of the four galaxies.
Belli, Sirio +11 more
core +7 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 +4 more
openaire +1 more source
, 2008 We present the faintest spectroscopically confirmed sample of redshift four and five Lyman break galaxies to date. The sample is based on slitless grism spectra of the Hubble Ultra Deep Field region from the GRAPES (Grism ACS Program for Extragalactic ...
Amber Straughn +50 more
core +1 more source
, 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 +3 more
core +1 more source
Damped Lyman alpha absorber and the faint end of the galaxy luminosity function at high redshift
, 1999 We combine predictions for several hierarchical cosmogonies with observational evidence on damped Lyman alpha systems to establish a correspondence between the high redshift galaxy population and the properties of damped Lyman alpha systems.
Haehnelt, Martin G. +2 more
core +1 more source