Results 51 to 60 of about 5,863 (203)

LESSER: a catalogue of spectroscopically selected sample of Lyman-alpha emitters lensed by galaxies

, 2020
We introduce the LEnSed laeS in the Eboss suRvey (LESSER) project, which aims to search for lensed Lyman-alpha emitters (LAEs) in the Extended Baryon Oscillation Spectroscopic Survey (eBOSS).
Mao, Shude, Cao, Xiaoyue, Gao, Liang, Li, Ran, Kneib, Jean-Paul, Shu, Yiping   +5 more
core   +1 more source

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

HOW LYMAN ALPHA EMISSION DEPENDS ON GALAXY STELLAR MASS [PDF]

The Astrophysical Journal Letters, 2016
ABSTRACT In this work, we show how the stellar mass (M *) of galaxies affects the 3 < z < 4.6 Lyα equivalent width (EW) distribution. To this end, we design a sample of 629 galaxies in the M * range from the ...
Grecco A. Oyarzún, Guillermo A. Blanc, Valentino González, Mario Mateo, John I. Bailey III, Steven L. Finkelstein, Paulina Lira, Jeffrey D. Crane, Edward W. Olszewski   +8 more
openaire   +3 more sources

Two Micron‐Size Dark Dimensions

Fortschritte der Physik, Volume 73, Issue 8, August 2025.
Abstract Two extra dimensions of micron scale might simultaneously address the gauge and cosmological hierarchy problems. In this paper various observational bounds in scenarios with one and two large extra dimensions are examined, to see if they are compatible with the micron scale.
Luis A. Anchordoqui, Ignatios Antoniadis, Dieter Lüst   +2 more
wiley   +1 more source

The physics of Lyman-alpha escape from disc-like galaxies

, 2022
Hydrogen emission lines can provide extensive information about star-forming galaxies in both the local and high-redshift Universe. We present a detailed Lyman continuum (LyC), Lyman-alpha (Ly{\alpha}), and Balmer line (H{\alpha} and H\b{eta}) radiative ...
Lars Hernquist, Mark Vogelsberger, Torrey, Paul, Rahul Kannan, Laura V Sales, Jessica Y-C Yeh, Paul Torrey, Li, Hui, Kannan, Rahul, Sales, Laura V., Jia Qi, Vogelsberger, Mark, Tacchella, Sandro, Yeh, Yuan-Chen, Qi, Jia, Hernquist, Lars, Marinacci, Federico, Federico Marinacci, Smith, Aaron, Aaron Smith, Sandro Tacchella, Hui Li   +21 more
core   +1 more source

Analysis of carbohydrates and glycoconjugates by matrix‐assisted laser desorption/ionization mass spectrometry: An update for 2021–2022

Mass Spectrometry Reviews, Volume 44, Issue 3, Page 213-453, May/June 2025.
Abstract The use of matrix‐assisted laser desorption/ionization (MALDI) mass spectrometry for the analysis of carbohydrates and glycoconjugates is a well‐established technique and this review is the 12th update of the original article published in 1999 and brings coverage of the literature to the end of 2022.
David J. Harvey
wiley   +1 more source

The Magellan M2FS Spectroscopic Survey of High-redshift Galaxies: The Brightest Lyman-break Galaxies at z ∼ 6

The Astrophysical Journal
We present a study of a sample of 45 spectroscopically confirmed, UV luminous galaxies at z ∼ 6. They were selected as bright Lyman-break galaxies (LBGs) using deep multiband optical images in more than 2 deg ^2 of the sky, and subsequently identified ...
Shuqi Fu, Linhua Jiang, Yuanhang Ning, Weiyang Liu, Zhiwei Pan   +4 more
doaj   +1 more source

The gaseous extent of galaxies and the origin of Lyman alpha absorption systems. IV: Lyman alpha absorbers arising in a galaxy group

, 1999
We present new GHRS observations of Lyman alpha absorption lines associated with a group of galaxies towards the QSO 1545+2101. We have identified eight distinct Lyman alpha absorption features in the spectrum of QSO 1545+2101 at a mean redshift of z=0.2648 with a velocity dispersion of 163 km/s.
Ortiz-Gil, A., Lanzetta, K. M., Webb, J. K., Barcons, X., Fernandez-Soto, A.   +4 more
openaire   +2 more sources

Comparison of Interannual Oscillations in the F, E, and D‐Region Ionosphere Using Longterm Ground‐Based Measurements

Journal of Geophysical Research: Space Physics, Volume 130, Issue 5, May 2025.
Abstract This comprehensive study focuses on interannual oscillations from 1 to 25 years in the F, E, and D region ionosphere. By leveraging longterm (1960–2018) continuous ground‐based ionosonde and phase height measurements in northern Germany, we have identified the peak periods and temporal variations of these oscillations using advanced analysis ...
Mani Sivakandan, Dieter H. W. Peters, Jens Mielich, Toralf Renkwitz, Ralph Latteck, Jorge L. Chau   +5 more
wiley   +1 more source

Relation between ionized gas kinematics and Lyman-alpha observables in galaxies

, 2023
In the early universe, galaxies can be detected via their Lyman-alpha emission, which is redshifted in the optical wavelength range (1215:7 Å, 2p to 1s transition of hydrogen). However, not all galaxies in the early universe show Ly-alpha emission.
Schaible, Anna Lena
core   +1 more source