Galactic winds from primeval galaxies |
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Authors: | Masao Mori Masayuki Umemura |
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Institution: | (1) Institute of Natural Sciences, Senshu University, Kawasaki 214-8580, Japan;(2) Center for Computational Sciences, University of Tsukuba, Tsukuba 305-8577, Japan |
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Abstract: | Ultra-high resolution hydrodynamic simulations using 10243 grid points are performed of early supernova burst in a forming galaxy, with properties similar to those inferred for Lyman
α emitters (LAEs) and Lyman Break Galaxies (LBGs). We show that, at the earliest stages of less than 300 Myr, continual supernova
explosions produce multitudinous hot bubbles and cooled H(I) shells in-between. The H(I) shells radiate intense Lyman α (Lyα) emission like LAEs. We found that the bubbly structures produced are quite similar to the observed features in the Lyα surface brightness distribution of the extended LAEs. After 1 Gyr, the galaxies are dominated by stellar continuum radiation
and then resemble the LBGs. At this point, the abundance of heavy elements appears to be solar. After 13 Gyr, these galaxies
resemble present-day ellipticals. |
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Keywords: | Galaxy formation Chemical evolution Hydrodynamics |
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