2013/03/07 by Nils Bergvall, N. Bergvall, Elisabet Leitet +4 · 2 citations
Physics and Astronomy · #Astronomy #Astrophysics #Biology #Context (archaeology) #Dark Ages #Galaxies: Formation, Evolution, Phenomena #Galaxy #Intergalactic travel #Leakage (economics) #Physics #Radio Astronomy Observations and Technology #Redshift #Reionization #Star formation #Stellar, planetary, and galactic studies #astro-ph.CO
paper · pdf · doi:10.1051/0004-6361/201118433
Accepted for publication in Astronomy & Astrophysics
arxiv created 2013/03/07 · openalex publication_date 2013/04/17 · arxiv updated 2015/06/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Context. Star-forming dwarf galaxies may have played an important role in the reionization of the Universe, provided that some fraction of their ionizing radiation were able to escape into the intergalactic medium. Local galaxies exhibiting such Lyman-continuum (LyC) leakage could potentially shed light on the escape mechanisms involved, but only two low-redshift cases of LyC leakage have been identified so far. Here, we argue that this meager harvest may be caused by unsuitable selection criteria. Candidates for LyC leakage are normally selected by indicators of starburst activity, one of which is a high equivalent width in Hα. Such a criterion will guarantee a high production of LyC photons but will also bias the selection in favour of a high column density in the neutral gas, effectively ruling out LyC escape.