Past Colloquia
Terrestrial Aftermath of Moon-forming Impact to Plate tectonics and habitability
Reichman Family Lecture Hall (ES1050)
Norman Sleep (Stanford)
January 24, 2014
14:00 - 15:00
Earth’s mantle was mostly molten after the Moon-forming impact. We assume that Earth had total CO2 and water inventories comparable to the modern ones. These volatiles entered the atmosphere, which soon became opaque and radiated at the runaway greenhouse threshold. The Moon caused strong Earth…
Assessing the Role of Stellar Feedback from Small to Large Scales
Cody Hall
Laura Lopez (MIT)
January 22, 2014
14:00 - 15:00
Stellar feedback has a profound influence in many astrophysical phenomena, yet it is often cited as one of the biggest uncertainties in galaxy formation models today. This uncertainty stems from a dearth of observational constraints as well as the great dynamic range between the small…
Galaxy Kinematics through Integral Field Spectroscopy
Cody Hall
David Law (Dunlap Institute)
January 15, 2014
14:00 - 15:00
In the young universe, galaxies were blobby conglomerations of stars whose irregular structures were products of their dynamically violent environments. Over time, star formation in these systems declined as the gas fraction dropped, and galaxies evolved into the spiral and elliptical structures with which we…
Radio Polarimetry and the Magnetic Universe
Cody Hall
Bryan Gaensler (CAASTRO / The University of Sydney)
January 10, 2014
14:00 - 15:00
A remarkable discovery made by 20th century astronomers was that the Universe is threaded with magnetic fields. Furthermore, these magnetic fields typically do not have a random, tangled, morphology, but are surprisingly organised and coherent. However, the processes that create and then sustain this large-scale…
Resolving Black Holes with the Event Horizon Telescope
Cody Hall
Shep Doeleman (MIT Haystack & Harvard-Smithsonian CfA)
December 20, 2013
14:00 - 15:00
A convergence of high bandwidth radio instrumentation and newly accessible mm and submm wavelength facilities are enabling assembly of the Event Horizon Telescope (EHT): a short-wavelength Very Long Baseline interferometry (VLBI) array with the capability of observing the nearest supermassive black holes with Schwarzschild Radius…
Karl W. Kamper Memorial Lecture – Nearby Galaxy Mergers Seen with Adaptive Optics: A Sharper Image
Cody Hall
Claire E. Max (CfAO, UC Observatories)
December 06, 2013
14:00 - 15:00
Adaptive Optics is a technology that detects and corrects changing distortions in optical systems. It has been applied to great effect during the past decade for correcting astronomical telescopes for blurring due to turbulence in the Earth’s atmosphere. This talk will describe how Adaptive Optics works,…
CMB Polarization with the South Pole Telescope
Cody Hall
Duncan Hanson (McGill)
November 29, 2013
14:00 - 15:00
Measurements of polarization in the Cosmic Microwave Background (CMB) are our best hope to measure the amplitude and scale of gravity waves in the early Universe. They also have the power to provide an (astrophysical) determination of the absolute neutrino mass scale. For the past…
A Thermometer for Goldilocks: Accurate Temperatures of Kepler M Dwarfs and Their Planets
Cody Hall
Eric Gaidos (Hawaii)
November 22, 2013
14:00 - 15:00
M dwarf stars are especially attractive targets in the search for Earth-like planets because small planets are easier to detect around such stars, and the “habitable zone” is closer to the star where planets are more readily detected. The Kepler mission has discovered Earth-size planets…
Extragalactic Archeology
Cody Hall
Charlie Conroy (UC-Santa Cruz)
November 15, 2013
14:00 - 15:00
One of the main avenues for understanding the formation and evolution of galaxies is through studying their present day stellar populations. A new generation of population synthesis tools that we have been developing are now capable of extracting an unprecedented amount of information from high…
Higher Education Today: Outstanding Training for the Last Century
Cody Hall
David Helfand (Quest U)
November 08, 2013
14:00 - 15:00
Canada has the highest post-secondary participation rate among OECD countries, and yet one of the lowest innovation rates. Why? I will offer an irreverent critique of “modern” universities and provide a description of a provocative alternative in Canada’s first independent, not-for-profit secular institution, Quest University…