Probing the Escape Fraction of Ionizing Radiation from Starburst Galaxies with Spitzer and GALEX

Details Probing the Escape Fraction of Ionizing Radiation from Starburst Galaxies with Spitzer and GALEX Probing the Escape Fraction of Ionizing Radiation from Starburst Galaxies with Spitzer and GALEX

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21530901o&link_type=abstract

American Astronomical Society, AAS Meeting #215, #309.01; Bulletin of the American Astronomical Society, Vol. 42, p.306

Astronomy and Astrophysics

Astronomy

Scientific paper

Starburst galaxies show reduced fractions of the diffuse, warm ionized medium relative to normal star-forming galaxies (Oey et al. 2007). We use Spitzer/MIPS mid-IR data and GALEX UV archive data to evaluate whether this "missing" luminosity is re-radiated in the mid and far-IR by dust. The multi-wavelength SEDs of our 20 galaxies show large variations between individual targets in our sample. Our preliminary results confirm a slight tendency for starburst galaxies to be more IR-luminous than non-starbursts, when normalizing by Hα flux, but the trend is much smaller than the galaxy-to-galaxy variation. We will evaluate whether the difference can explain the low fraction of warm ionized medium in starbursts.

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