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- W1998861584 abstract "We present the results of the observations of the line profiles of 91 emission-line galaxies at z=3.1 with the spectral resolution of lambda/deltalambda (FWHM) = 1700, or 180 km/s. A significant fraction, ~50% of the observed objects show the characteristic double peaks in their Lyalpha profile. The red peak is much stronger than the blue one for most of the cases. The red peaks themselves also show weak but significant asymmetry and their widths are correlated with the velocity separation of the red and the blue peaks, which implies that the peaks are not isolated multiple components with different velocities but the parts of the single line which is modified by the absorption and/or scattering by the associated neutral hydrogen gas. The characteristic profile can be naturally explained by the scattering in the expanding shell of neutral hydrogen surrounding the emitting region while the attenuation by the inter-galactic medium should also be considered. Our results suggest that the star-formation in these emitters are dominated by the young burst-like events which produce the intrinsic emission as well as the gas outflow." @default.
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- W1998861584 date "2012-03-16" @default.
- W1998861584 modified "2023-09-27" @default.
- W1998861584 title "Profiles of Lymanalpha Emission Lines" @default.
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