Other
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...201.3205s&link_type=abstract
American Astronomical Society, 201st AAS Meeting, #32.05; Bulletin of the American Astronomical Society, Vol. 34, p.1154
Other
Scientific paper
We present new results about z 3 Lyman Break Galaxies (LBGs) and their impact on the intergalactic medium (IGM). We place particular emphasis on what can be learned from LBG rest-frame UV spectra. Previously, the spectra of LBGs have been used primarily as redshift indicators for the purpose of describing large-scale properties such as clustering and luminosity functions. However, our knowledge of LBG UV spectral properties is now advancing along two complementary fronts. First, by using very high-quality spectra of a small sample of exceptionally bright objects, we derive detailed information about their interstellar abundance patterns, outflow kinematics and geometry. Second, by drawing from our database of ~ 1000 spectra, and constructing higher S/N composite spectra from galaxies grouped according to properties such as Lyman-alpha profile, kinematics, luminosity, and extinction, we show how the rest-frame UV spectroscopic properties systematically depend on other galaxy parameters. One of the basic properties indicated by LBG UV spectra is the large-scale outflow of interstellar material accelerated by the mechanical energy input from supernovae explosions. By comparing the large-scale distributions of LBGs, and intergalactic HI and metals, we show how these outflows may have a profound influence on the state of the IGM at z 3.
Adelberger Kurt Ludvig
Pettini Marco
Shapley Alice E.
Steidel Charles C.
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