Influence of Galaxy Rotation and Outflows in the Lyman-Alpha spectral line

19 Nov 2016 . category: projects . Comments

What? Physics Undergraduate Thesis

When? Fall 2015

Where? Universidad de los Andes, Bogotá, Colombia

Advisor? Dr. Jaime Forero-Romero

Young galaxies in the Universe have a strong Ly- emission caused by the ionized Hydrogen atoms in their interstellar medium. When the spectrum of a galaxy has an intense peak around the Ly- natural frequency (2:46  1015 Hz) it is called a Lyman Alpha Emitter (LAE). Typical LAEs are very distant (z & 2). This makes that all the data astronomers can obtain from them is their spectra, and from there all the physical information of the galaxy must be derived. Trying to solve this task requires the creation of a simplifi ed and solid model. In this monograph I propose to consider LAEs as a spherical distribution of Hydrogen atoms that undergoes a solid body rotation and a radial expansion. I simulate the eff ect of rotational velocity, outflow velocity and optical depth of the LAE in the outgoing spectra. The main conclusion is that this new model reproduces LAEs observed features in a clear way and with consistent physical parameters. However, proper observational fi ts are left for future work. This monograph accomplishes the objective of extracting as much information as possible from a LAE’s Ly- line.


Maria Camila is in love with traveling, living new experiences and meeting new friends. She doesn't like trying new food tho, but she compensates it in ice-cream eating!