Title: Discovery of strong Lyman continuum emitting galaxies: Cosmic "ionizer"?
Author(s): Akio K. Inoue, Ikuru Iwata
Abstract:

Young star-forming galaxies should be a main source of ionizing radiation which caused
the cosmic reionization. Nevertheless, our knowledge of the galactic Lyman continuum
emissivity is still quite poor. Direct detections of the Lyman continuum are challenging
but have particular importance. We made Subaru/Suprime-Cam deep narrow-band
imaging to search the Lyman continuum from z~3 LBGs and LAEs and found that
~10% of the obserbed galaxies emit a strong Lyman continuum which cannot be explained
with a standard population synthesis model with a normal IMF. This new population of
galaxies could play an important role on the ionizing background and the cosmic reionization.