Results 101 to 110 of about 8,368 (167)
The Open Journal of AstrophysicsThe hydrogen Lyman-alpha (Ly$\alpha$) emission line, the brightest spectral feature of a photoionized gas, is considered an indirect tracer of the escape of Lyman continuum (LyC) photons, particularly when the intergalactic medium is too opaque for ...
Erik Solhaug +9 more
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CECILIA: Ultradeep Rest-optical Spectra of Faint Galaxies at Cosmic Noon
The Astrophysical Journal LettersIntrinsically faint galaxies at z ∼ 2–3 offer critical insights into early galaxy formation, tracing low-metallicity, low-mass systems during cosmic noon and serving as analogs to reionization-era galaxies. We present ultradeep JWST/NIRSpec spectroscopy
Menelaos Raptis +8 more
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Lyman Break Galaxies and the Lyman-alpha Forest
, 2002 We use hydrodynamic simulations to predict correlations between Lya forest absorption and galaxies at redshift z~3. The probability distribution function (PDF) of Lya flux decrements shifts systematically towards higher values in the vicinity of galaxies, reflecting the overdense environments in which these galaxies reside. The predicted signal remains
Kollmeier, Juna A. +3 more
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Connecting Lyα and Ionizing Photon Escape in the Sunburst Arc
The Astrophysical JournalWe investigate the Ly α and Lyman continuum (LyC) properties of the Sunburst Arc, a z = 2.37 gravitationally lensed galaxy with a multiply imaged, compact region leaking LyC and a triple-peaked Ly α profile indicating direct Ly α escape.
M. Riley Owens +20 more
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Giant disk galaxies, dwarfs and Lyman alpha clouds
Physics Reports, 1999 Abstract If one omits early-type galaxies and high-density regions, disk galaxies form a one-dimensional sequence, characterized by galaxy mass (or rotation velocity). This sequence has a top and a bottom end. Three stages are involved in the formation of a galaxy and the complexities explain why the sequence has these two distinct ends. The numerous,
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Chasing Lyman alpha-emitting galaxies at z = 8.8
, 2018 Submitted to A&A, comments are ...
Laursen, Peter +4 more
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CLASSY. XI. Tracing Neutral Gas Properties Using UV Absorption Lines and 21 cm Observations
The Astrophysical JournalRest-frame far-ultraviolet (FUV) observations from JWST are revolutionizing our understanding of the high- z galaxies that drove reionization and the mechanisms by which they accomplished it.
Kaelee S. Parker +17 more
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Lyman Alpha Driven Outflows Around Star Forming Galaxies
, 2008 We present accurate Monte-Carlo calculations of Lyman Alpha (hereafter Lya) radiation pressure in a range of models which represent galaxies during various epochs of our Universe. We show that the radiation force that Lya photons exert on hydrogen gas in the neutral intergalactic medium (IGM), that surrounds minihalos that host the first stars, may ...
Dijkstra, Mark, Loeb, Abraham
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The Lyα and Continuum Origins Survey. I. Survey Description and Lyα Imaging
The Astrophysical Journal Supplement SeriesUnderstanding the mechanisms driving the escape of ionizing or Lyman continuum (LyC) emission from the interstellar medium of galaxies is necessary to constrain the evolution of reionization and the sources responsible for it.
Alexandra Le Reste +27 more
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On the Physical Nature of Lyα Transmission Spikes in High-redshift Quasar Spectra
The Astrophysical JournalWe investigate Lyman-alpha (Ly α ) transmission spikes at 5.2 < z < 6.8 using synthetic quasar spectra from the “Cosmic Reionization on Computers” simulations.
Hanjue Zhu +2 more
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