WFC3 Infrared Spectroscopic Parallel Survey {WISP}: A Survey of Star Formation Across Cosmic Time

Details WFC3 Infrared Spectroscopic Parallel Survey {WISP}: A Survey of Star Formation Across Cosmic Time WFC3 Infrared Spectroscopic Parallel Survey {WISP}: A Survey of Star Formation Across Cosmic Time

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009hst..prop12283m&link_type=abstract

HST Proposal ID #12283. Cycle 18

Computer Science

Scientific paper

We will use the unique power of WFC3 slitless spectroscopy to measure cosmic star formation across its peak epoch. The broad, continuous, spectral coverage of the G102 and G141 grisms provides the best currently feasible measurement of the star formation rate continously from 0.55.5.Our primary science goals are: {1} Measure ratios of bright emission lines {[OII], [OIII], Ha, and Hb} in a substantial fraction of these galaxies, thereby estimating dust and metallicity evolution in a sample of galaxies that is not biased by photometric selection. {2} Derive an extinction-corrected Ha luminosity function, with a 20 times larger sample than our previous NICMOS results. {3} Measure the mass-metallicity relation at crucial intermediate redshifts, with the support of our ongoing ground-based, follow-up, observing program {4} Determine the spectroscopic close pair fraction in this sample, in order to constrain hierarchal merging models {5} Uncover a new sample of obscured AGN at these redshifts and, {6} Use the Balmer break diagnostic to constrain the ages of continuum detected sources down to H = 25.As a bonus, these observations will be sensitive to Lya emission at z>5.5, taking advantage of continuous spectral coverage to observe large volumes for luminous galaxies at the highest redshifts. Over Cycles 17 and 18, we expect to detect 5-20 LAEs over redshifts spanning 5.5 < z < 7.5. These observations will likely place the most stringent constraint on the numbers of z>6.5 Lya emitters until JWST. We are waiving all proprietary rights to our data and will make high-level data products available through the ST/ECF.;

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