Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21740705s&link_type=abstract
American Astronomical Society, AAS Meeting #217, #407.05; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
In order for star-forming galaxies to reionize the intergalactic medium (IGM) at z > 6, a significant fraction of the ionizing photons must escape into the IGM. Recently, a subset of galaxies at z=3.1 have been found emitting ionizing radiation, but it is unclear why these galaxies have such large escape fractions. To better understand the mechanisms which allow for large escape fractions, we have obtained a single, 32-orbit image with the WFC3/UVIS camera on HST to obtain resolved images of escaping Lyman continuum (LyC) radiation from 10 galaxies at z 3.1. Seven galaxies are detected with leaking LyC. In many of the galaxies, the LyC flux is only coming from a subset of the star-forming regions. We will present the LyC morphologies, resolved SEDs of the LyC-emitting regions, and rest-frame UV spectra of these galaxies. Together, these data will help us understand how galaxies were able to reionize the universe and subsequently maintain the ionizing background at high redshift.
Shapley Alice E.
Siana Brian D.
Steidel Charles C.
Teplitz Harry I.
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