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Simple Models of Metal-Line Absorption and Emission from Cool Gas Outflows | | J. Xavier Prochaska
; Daniel Kasen
; Kate Rubin
; | | Date: |
16 Feb 2011 | | Abstract: | Because the FeII lines are connected by optically-thin transitions to
fine-structure levels, their profiles more closely reproduce the intrinsic
opacity of the wind. Together these results naturally explain the absorption
and emission-line characteristics observed for star-forming galaxies at z<1. We
also study a scenario promoted to describe the outflows of z~3 Lyman break
galaxies and find prfiles inconsistent with the observations due to scattered
photon emission. Although line-emission complicates the analysis of
absorption-line profiles, the surface brightness profiles offer a unique means
of assessing the morphology and size of galactic-scale winds. Furthermore, the
kinematics and line-ratios offer powerful diagnostics of outflows, motivating
deep, spatially-extended spectroscopic observations. | | Source: | arXiv, 1102.3444 | | Services: | Forum | Review | PDF | Favorites | |
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