Lyman Alpha spectra from rotating outflows
February 2018 »
Abstract:
Outflows and rotation are two ubiquitous kinematic features in the gas distributions of galaxies. Here we perform Monte Carlo radiative transfer simulations of outflowing gas with additional solid body rotation to understand how these two features impact the morphology of the Lyman-Alpha emission line. One of the most notorious results is that rotation increases the detected flux at the line’s center in comparison with the non-rotational case. Rotation also induces a line broadening and a dependency with the viewing angle. We present a semi-analytic model that modifies the spectra of non-rotational that manages to reproduce the main features of these Monte Carlo simulations. As an application example we contraint the rotation parameters to the observed Lyman-Alpha profile of a high redshift LAE, providing the first a constraint on the rotational velocity of a high redshift galaxy based on its integrated Lyman-Alpha emission.
Authors:
- Maria Camila Remolina-Gutiérrez
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