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- W2000288619 abstract "Shull et al. have asserted that the contribution of stars, relative to quasars, to the metagalacticbackground radiation that ionizes most of the baryons in the universeremains almost completely unknown at all epochs. The potential todirectly quantify this contribution at low redshift has recently becomepossible with the identification by GALEX of large numbers ofsparsely distributed faint ultraviolet galaxies. Neither STIS norFUSE nor GALEX have the ability to efficiently survey these sparsefields and directly measure the Lyman continuum radiation that may leakinto the low redshift (z < 0.4) intergalactic medium. We presenthere a design for a new type of far ultraviolet spectrograph, one thatis more sensitive, covers wider fields, and can provide spectra andimages of a large number of objects simultaneously, called theFar-ultraviolet Off Rowland-circle Telescope for Imaging andSpectroscopy (FORTIS). We intend to use a sounding rocket flight tovalidate the new instrument with a simple long-slit observation of thestarburst populations in the galaxy M83. If however, the long-slitwere replaced with microshutter array, this design could isolate thechains of blue galaxies found by GALEX over an ~30' diameterfield-of-view and directly address the Lyman continuum problem in along duration orbital mission. Thus, our development of the soundingrocket instrument is a pathfinder to a new wide field spectroscopictechnology for enabling the potential discovery of the longhypothesized but elusive Lyman continuum radiation that is thought to leak from low redshift galaxies and contribute to the ionization of the universe." @default.
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- W2000288619 date "2004-10-11" @default.
- W2000288619 modified "2023-09-23" @default.
- W2000288619 title "FORTIS: pathfinder to the Lyman continuum" @default.
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- W2000288619 doi "https://doi.org/10.1117/12.552799" @default.
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