Other
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..380...97v&link_type=abstract
At the Edge of the Universe: Latest Results from the Deepest Astronomical Surveys ASP Conference Series, Vol. 380, proceedings o
Other
1
Scientific paper
To understand the diversity of Lyα line profiles observed in star forming galaxies and related objects, a 3D Monte Carlo Lyα radiation transfer code was developed tep{AV_06}. This code allows for prescribed arbitrary hydrogen density, ionisation, temperature structures, and dust distributions, and arbitrary velocity fields and UV photon sources. Here we present results from the first modelling of the Lyα line with our code of a sample of z˜ 3 Lyman break galaxies taken from tet{AV_p02} and tet{AV_t06}. A simple model of an expanding neutral shell surrounding a starburst region reproduce the whole variety of spectra ranging from double-peaked profiles to asymmetric emission lines, P-Cygni profiles, and broad absorption. If observational constraints give us the outflow velocity and the dust content, other parameters such as the hydrogen column density, the intrinsic Lyα emission and hence SFR, and the intrinsic Lyα line widths, can be determined consistently taking all radiation transfer effects into account.
Atek Hakim
Schaerer Daniel
Tapken Christian
Verhamme Anne
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