The Lyman Continuum Escape Fraction at Moderate Redshift

Details The Lyman Continuum Escape Fraction at Moderate Redshift The Lyman Continuum Escape Fraction at Moderate Redshift

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21114306t&link_type=abstract

American Astronomical Society, AAS Meeting #211, #143.06; Bulletin of the American Astronomical Society, Vol. 39, p.996

Astronomy and Astrophysics

Astronomy

Scientific paper

Massive starbursts may have played a dominant role in the reionization of the Universe. Their contribution depends in part upon the fraction of ionizing radiation that escapes from the intrinsic opacity of galaxies below the Lyman limit. Current surveys suggest that the escape fraction is low in all but 15-25% of galaxies, even among young starbursts. We present new HST ultraviolet imaging of moderate redshift starbursts to constrain how close to zero the escape fraction is in galaxies that are similar to those which may have reinoized the Universe. We targeted 15 bright, blue galaxies at z 1.3 in the GOODS fields for 5 orbits each using the Solar Blind Channel of the ACS, achieving the deepest limits to date on the escape fraction in individual sources.

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