Hubble captures multiply-imaged ionizing radiation from strongly lensed galaxy at z=2.4. (arXiv:1904.08186v1 [astro-ph.GA])
<a href="http://arxiv.org/find/astro-ph/1/au:+Rivera_Thorsen_T/0/1/0/all/0/1">T. Emil Rivera-Thorsen</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Dahle_H/0/1/0/all/0/1">H&#xe5;kon Dahle</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Chisholm_J/0/1/0/all/0/1">John Chisholm</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Florian_M/0/1/0/all/0/1">Michael K. Florian</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gronke_M/0/1/0/all/0/1">Max Gronke</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gladders_M/0/1/0/all/0/1">Michael D. Gladders</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Rigby_J/0/1/0/all/0/1">Jane R. Rigby</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Mahler_G/0/1/0/all/0/1">Guillaume Mahler</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sharon_K/0/1/0/all/0/1">Keren Sharon</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bayliss_M/0/1/0/all/0/1">Matthew Bayliss</a>

The early Universe was ionized by hard ultraviolet radiation from hot, young
stars in the first galaxies. These galaxies contain absorbing neutral Hydrogen
which must be configured favorably to allow ionizing escape; only a few dozen
cases have been detected at any redshift. Here we present Hubble observations
of the brightest known lensed galaxy, the Sunburst Arc, revealing bright,
multiply-imaged escape from a compact stellar region through a narrow channel
in an optically thick gas. Gravitational lensing magnification has allowed the
clearest view yet of how ionizing photons escape galaxies, providing a unique
window to the last major phase transition of the Universe, the epoch of
re-ionization. The multiple sight lines to the source probe absorption by
intergalactic neutral Hydrogen on unprecedentedly small scales.

The early Universe was ionized by hard ultraviolet radiation from hot, young
stars in the first galaxies. These galaxies contain absorbing neutral Hydrogen
which must be configured favorably to allow ionizing escape; only a few dozen
cases have been detected at any redshift. Here we present Hubble observations
of the brightest known lensed galaxy, the Sunburst Arc, revealing bright,
multiply-imaged escape from a compact stellar region through a narrow channel
in an optically thick gas. Gravitational lensing magnification has allowed the
clearest view yet of how ionizing photons escape galaxies, providing a unique
window to the last major phase transition of the Universe, the epoch of
re-ionization. The multiple sight lines to the source probe absorption by
intergalactic neutral Hydrogen on unprecedentedly small scales.

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