Apr 20, 2017 4:00 pm - Nielsen Hall 170 - Colloquium
Katherine Alatalo - Carnegie Observatories
Shining light on the hidden pathways of galaxy transformation

The morphological and color bimodalities displayed by modern-day galaxies suggest that a galaxy must have rapidly transformed from one class to the other. In the modern universe, this transition is one-way, which makes it essential to gain a census of initial conditions capable of catalyzing this metamorphosis. Classical searches that capture transitioning galaxies via signatures of intermediate-aged stars and lack of nebular ionized gas emission exclude the very gas physics that are often fundamental to understanding the galaxy's transition. I will present the Shocked POststarburst Galaxy Survey (SPOGS), a novel method for finding previously-missed transitioning galaxies using their ionized gas line ratios. I will discuss early results suggesting my SPOGS criterion pinpoints objects at an earlier phase of transformation, when more signs of transition triggers still exist.  Our exquisite case study, NGC1266, demonstrates the success of this method. These new observations shed light on the fundamental role gas plays in the ultimate quenching and transformation of a galaxy.



CMP Journal Club

Mar 29, 2018 1:30 pm

Nielsen Hall 103 - Kieran Mullen


Mar 29, 2018 4:00 pm

Nielsen Hall 170 - BG Andersson
Status of, and science with, the Stratospheric Observatory For Infrared Astronomy (SOFIA)

Astronomy Journal Club

Mar 30, 2018 12:30 pm

Nielsen Hall 103 - Maria Schutte and BG Andersson