Joint UVA/NRAO Colloquium
|Date & Time||Tuesday May 15, 2012|
|Title||The End of a Galaxy’s Star Formation|
|Speaker||Charles Liu, American Museum of Natural History|
|Abstract||What causes a galaxy to cease its star formation, and what happens in the final stages of that cessation? These questions figure prominently in current efforts to understand galaxy evolution as a whole. One way to study these questions is to examine E+A galaxies, also known as “k+a” or “post-starburst” galaxies. One of the best examples of a low-redshift field E+A galaxy is J152426.5+080907, also known as “G515” or “Flagellan,” which shows clear evidence of vigorous star formation a billion years ago and zero star formation today. I present multiwavelength data that has been gathered over twenty years in an effort to (1) decipher the temporal and spatial propagation of the quenching of star formation in this galaxy and (2) probe the possible presence and role of an aging AGN.|
Refreshments will be served at 3:45.