Resolved H alpha star formation in two lensed galaxies at z=0.9

Details Resolved H alpha star formation in two lensed galaxies at z=0.9 Resolved H alpha star formation in two lensed galaxies at z=0.9

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008hst..prop11678r&link_type=abstract

HST Proposal ID #11678. Cycle 17

Computer Science

Scientific paper

We will obtain H alpha narrow-band images of two galaxies at z=0.912 that have been gravitationally lensed by the galaxy cluster Abell 2390. H alpha falls squarely into the F126N filter, and both galaxies fit in a single WFC3 field of view. Because these two galaxies are magnified by factors of 6.7 {+-0.4} and 12.6 {+-0.8}, WFC3 IR pixels probe spatial scales of 150 and 80 pc. {Without lensing, the WFC3 pixels probe 1 kpc scales at these redshifts.} Thus, these two galaxies provide a rare chance to examine, in detail and at high S/N, the spatial distribution of star formation in average galaxies at z=1. After lensing deprojection, we will study the spatial distribution of star formation, the star-forming disk properties and nuclear contribution, as well as the distributioin of extinction {from the archival F55W to H-alpha ratio map}. We will also compare integrated extinction-corrected H alpha to Spitzer-derived diagnostics of star formation rate.;

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