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2017 Fall Science Colloquia Webcasts
Wednesday Sep 6, 2017
2017 Fall Science Colloquia
Geronimo Luis Villanueva (Goddard Space Flight Center)
We recently established that Mars lost an ocean’s worth of water, while the Curiosity rover has recently detected organics on the Martian surface and in the atmosphere. If Mars had a rich chemical and diverse past, how much of these biomarkers were l ...
Wednesday Sep 13, 2017
2017 Fall Science Colloquia
Mark Devlin (University of Pennsylvania)
Researchers have been utilizing the measurements of the Cosmic Microwave Background (CMB) for the last several decades to study the birth and evolution of our Universe. I will review the science behind the CMB and describe how we extract cosmologica ...
Wednesday Sep 20, 2017
2017 Fall Science Colloquia
Raffaella Margutti (Northwestern University)
Observations are drawing a complex picture of the latest stages of massive stars evolution and their explosions. In this seminar I concentrate on two among the least understood aspects of stellar evolution, adopting an observational perspective: How ...
Wednesday Sep 27, 2017
2017 Fall Science Colloquia
Bruce Draine (Princeton University)
The anomalous microwave emission (AME) is emission in the 20-60 GHz range that is correlated with interstellar dust. Discovered in 1996 by the COBE DMR experiment, the AME is a "foreground" that needs to be removed to study the CMB, but it is also a ...
Wednesday Oct 4, 2017
2017 Fall Science Colloquia
Megan Donahue  (Michigan State University )
One of the biggest challenges to understanding how galaxies work is decoding the role of the central supermassive black hole. Without feedback from the black hole (“AGN feedback”), galaxy evolution models fail to produce realistic massive galaxies an ...
Wednesday Oct 11, 2017
2017 Fall Science Colloquia
Caitlin Casey (University of Texas)
Although rare in the nearby Universe, galaxies with extraordinary star-formation rates (100-1000x the Milky Way at >100 Msun/year) represent the typical massive galaxy in the early Universe ~10 billion years ago. These galaxies’ high star-formation ...
Wednesday Oct 25, 2017
2017 Fall Science Colloquia
Ian Roederer (University of Michigan)
: NASA's Cosmic Origins program aims to address the question, "How did we get here?" My work addresses this question through three broad themes: the nature of the first stars, the formation and evolution of the Milky Way and Local Group, and the ori ...
Wednesday Nov 1, 2017
2017 Fall Science Colloquia
Blakesley Burkhart (Harvard-Smithsonian Center for Astrophysics)
Our current view of the interstellar medium (ISM) is as a multiphase environment where turbulence affects many key processes. These include star formation, cosmic ray acceleration, and the evolution of structure in the diffuse ISM. It is therefore es ...
Wednesday Nov 8, 2017
2017 Fall Science Colloquia
Mariska Kriek (University of California-Berkeley)
In past years, large and deep photometric and spectroscopic surveys have significantly advanced our understanding of galaxy growth, from the most active time in the universe (z~2) to the present day. In particular, the evolution in stellar mass, star ...
Wednesday Nov 29, 2017
2017 Fall Science Colloquia
Victoria Kaspi (McGill University)
Fast Radio Bursts (FRBs) are a newly discovered astrophysical phenomenon consisting of short (few ms) bursts of radio waves. FRBs occur roughly 1000 times per sky per day. From their dispersion measures, these events are clearly extragalactic and p ...
Wednesday Dec 6, 2017
2017 Fall Science Colloquia
Mark Vogelsberger (Massachusetts Institute of Technology)
In my talk I will describe recent efforts to model the large-scale distribution of galaxies with cosmological hydrodynamics simulations. I will focus on the Illustris simulation, and our new simulation campaign, the IllustrisTNG project. After demon ...
Wednesday Dec 13, 2017
2017 Fall Science Colloquia
Gilles Fontaine (University of Montreal)
A few years ago, Charpinet, Fontaine, & Brassard (2009, Nature, 461, 501) developed a new approach to test for solid body rotation (and deviations thereof) in pulsating stars. The method was successfully applied to the prototype of the GW Vir class o ...