Absorption lines observed in quasar spectra allow us to study the evolution of gas and galaxies in a way that is independent of imaging techniques. The presenter will describe their work on a catalog of absorption lines due to singly ionized magnesium (MgII) atoms, seen in quasar spectra. Magnesium is produced during nucleosynthesis in massive stars, and enriches the gas of a galaxy when it is ejected in supernova explosions. MgII is an indicator of low-ionization and neutral gas, and is therefore an excellent tracer of galaxies. The goal of this project is to complete a catalog of all the MgII systems contained in the quasar spectra of the Sloan Digital Sky Survey. This year, ~3000 spectra have been found and searched, adding to the ~15,000 spectra searched during summer 2010. Confirmed systems are measured to determine their positions and absorption strengths. Once the measurements are complete it will be compared with results of earlier work done at the University of Pittsburgh.
|Presenter:||Jacob Beyer (Undergraduate Student)|
|Location:||Seymour Union Main Lounge|
|Time:||1:15 pm Session III|
Poetry Out Loud Recitation Competition
6 pm - 8 pm
American Democracy Project Lecture: Janet Poppendieck
5 pm - 5:45 pm