UV Imaging and Spectroscopy of Luminous Blue Compact Galaxies from z=0 to z=1

Details UV Imaging and Spectroscopy of Luminous Blue Compact Galaxies from z=0 to z=1 UV Imaging and Spectroscopy of Luminous Blue Compact Galaxies from z=0 to z=1

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000hst..prop.8590l&link_type=abstract

HST Proposal ID #8590

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Hst Proposal Id #8590 Galaxies

Scientific paper

Are Lyman Break Galaxies {LBGs} at redshift z 3 centrally- concentrated, massive starbursts at the bottoms of deep potential wells of dark matter, or isolated, irregular, low- mass starburst galaxies? One significant barrier to deeper understanding of LBGs is the lack of available UV data on local star-forming galaxies for comparison. To address that lack, we propose STIS FUV imaging and spectroscopy of two well-defined samples of low-mass starburst galaxies, one in the local universe {z<0.1} and another at intermediate redshifts {0.2 < z < 0.7}. Both samples show optical sizes, morphologies, emission line widths, and luminosities comparable to those of LBGs at z=3, and are therefore probably the best local analogs and testbeds for further study of LBGs. Our main goals are to: {1} explore the morphologies, surface brightness distributions, and half-light radii of nearby starforming galaxies in the FUV, near Ly-alpha; {2} search for systematic differences among UV, optical, and near-IR morphologies and structural parameters; {3} investigate the intrinsic emission and absorption spectra near Ly-alpha of starbursting dwarf galaxies, with special attention to Ly- alpha profiles and interstellar and stellar photospheric absorption from Si II, O I, C II, Si IV, and C IV; {4} measure their FUV-optical colors and dust extinction properties; and {5} test the hypothesis that low-mass starbursts are the local counterparts of LBGs.

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