Past Colloquia
The Dynamics of the Local Group in the Era of Precision Astrometry
Cody Hall, AB 107, University of Toronto
Gurtina Besla
September 18, 2019
3:00 pm - 4:00 pm
Our understanding of the dynamics of our Local Group of galaxies has changed dramatically over the past few years owing to significant advancements in astrometry and our theoretical understanding of galaxy structure. New surveys now enable us to map the 3D structure of our Milky…
NIRCam on the James Webb Space Telescope:Targets Near and Far
Cody Hall, AB 107
Marcia Rieke, University of Arizona
April 24, 2019
3:00 pm - 4:00 pm
The Near Infrared Camera for JWST plays multiple roles for the mission as it is both the wavefront sensor used to align the telescope, and a science camera with a broad range of capabilities. The NIRCam Instrument Team observing program includes targets ranging from solar…
How to Reionize the Universe – Clues from the Low-Redshift “Green Pea” Galaxies
Cody Hall, AB 107
Anne Jaskot (University of Massachusetts)
April 17, 2019
3:00 pm - 4:00 pm
The reionization of the intergalactic medium at z>6 is one of the major transformations in the universe’s history, and yet, we know little about how it occurred. The most likely explanation is that Lyman continuum (LyC) radiation escaped into the intergalactic medium from early star-forming…
The Origin and Demographics of Long-Period Giant Planets
Cody Hall, AB 107
Brendan Bowler (University of Texas at Austin)
April 10, 2019
3:00 pm - 4:00 pm
Observations of exoplanets over the past quarter century have shown that the demographics and architectures of planetary systems exhibit a remarkable diversity spanning over five orders of magnitude in mass, separation, and age. Direct imaging has opened up much of this landscape, enabling a powerful…
A look into the birth cradles of planets with ALMA: signatures of planet formation in protoplanetary disks
Cody Hall, AB 107
Nienke van der Marel, Herzberg Institute for Astrophysics in Victoria, BC
April 03, 2019
3:00 pm - 4:00 pm
In the last two decades thousands of exoplanets have been discovered, showing that planets are ubiquitous throughout the Milky Way. However, the formation of planets itself remains a mystery. Protoplanetary disks of gas and dust around young stars are the birth cradles of planets, and…
The Past, Present, and Future of 21cm Cosmology
Cody Hall, AB 107
Adrian C. Liu (McGill University)
March 27, 2019
3:00 pm - 4:00 pm
Despite tremendous recent progress, gaps remain in our knowledge of our cosmic history. For example, we have yet to make direct observations of Cosmic Dawn or the subsequent Epoch of Reionization. Together, these represent the important period when the first stars and galaxies were formed,…
Dark Matter, First Light
Cody Hall, AB 107
Katie Mack (NC State University)
March 20, 2019
3:00 pm - 4:00 pm
Dark matter forms the foundation for all cosmic structure, and its fundamental nature is one of science’s most pressing enigmas. As we search for the most distant galaxies in the universe with radio and infrared observations, we are in a position to explore the particle…
Making Sense of Stellar Rotation Observed with Kepler: Gyrochronology, Magnetism, and a Sun in Transition
Cody Hall, AB 107
Jennifer van Saders (University of Hawaii)
March 13, 2019
3:00 pm - 4:00 pm
Stellar rotation carries a wealth of information about stellar populations. In particular, the technique of gyrochronology was developed to utilize the spin-down of stars as a function of time as an indicator of stellar age. Gyrochronology has the potential to yield precise ages for large samples of stars, providing…
Neutron Star Mergers Across Cosmic Time
Cody Hall, AB 107
Wen-fai Fong (Northwestern University)
March 06, 2019
3:00 pm - 4:00 pm
Multi-messenger astronomy coupling gravitational waves and light was born with the detection of the first neutron star merger, GW170817. This discovery signaled a wealth of firsts in physics and astronomy and represents only the tip of the iceberg of the discovery potential we can achieve…
Feb 27 – Colloquium Cancelled
Cody Hall, AB 107
Sarah Burke-Spolaor (West Virginia University)
February 27, 2019
3:00 pm - 4:00 pm
Unfortunately this event has been cancelled. Our apologies for any inconvenience. Original Posting: “Binary supermassive black holes: the hunt is on” We are seeking both light and gravitational waves from binary supermassive black holes, the biggest, meanest discrete binary systems in the Universe. When two…