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Past Colloquia

The Future of Astronomy is Super(conducting): Microwave Kinetic Inductance Detectors for UVOIR Astronomy

Cody Hall

Ben Mazin (UC Santa Barbara)

April 10, 2015
14:00 - 15:00

In the last five years we have made remarkable progress in turning superconducting lumped element microwave resonators into the most powerful UV, optical, and near-IR detectors in the world.  In this talk I will describe in detail the operating principles of these detectors, called Microwave Kinetic Inductance Detectors, and…

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A Half-Century of Astronomy Outreach: Stories, Reflections, and Lessons Learned

Cody Hall

John Percy (University of Toronto)

March 27, 2015
14:00 - 15:00

Outreach has always been valued in our department, and the university as a whole shows signs of making it a higher priority — not just because it supports recruitment, alumni relations, fundraising, and our public image, but also because we are accountable to the public,…

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Mass assembly in star-forming clouds from filaments to disks

Cody Hall

Rachel Friesen (University of Toronto)

March 20, 2015
14:00 - 15:00

Recent surveys of dust continuum emission of Galactic star-forming regions have revealed the ubiquity of filamentary structures in molecular clouds. The prevalence of filaments within star-forming regions raises the tantalizing possibility that the star formation efficiency in molecular clouds is strongly dependent on how these…

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Revealing the gas-star formation connection over cosmic time

Cody Hall

Jacqueline Hodge (NRAO)

March 13, 2015
14:00 - 15:00

Thanks to deep surveys in the rest-frame optical/UV and color-selection techniques, the star formation history of the universe has now been constrained through the era of galaxy assembly at z~1-3 and all the way out to the epoch of reionization. Yet despite such advances, little…

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New Insights into the Interstellar Medium in our Neighbor M31

Cody Hall

Karin Sandstrom (University of Arizona)

March 06, 2015
14:00 - 15:00

As the nearest metal-rich, star-forming galaxy to the Milky Way, M31 plays a key role in understanding the interstellar medium (ISM) and star formation at z~0. Because of its proximity, we can study the properties of the ISM on the scale of individual star-forming molecular…

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Double Feature: “SZ with AGN” and “The Cosmology Large Angular Scale Surveyor”

Cody Hall

Tobias Marriage (Princeton)

February 13, 2015
14:00 - 15:00

Part 1: Evidence is mounting that Active Galactic Nuclei (AGN) are responsible for the lack of star-formation in the most massive galaxies. Attention has been drawn to the role of energetic radio-mode feedback from the AGN in heating the gas around massive halos and preventing…

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Exotic Supernovae and Tidal Disruption Events from the Pan-STARRS1 Survey

Cody Hall

Ryan Chornock (Ohio University)

February 06, 2015
14:00 - 15:00

The Pan-STARRS1 (PS1) project was a five-band optical survey of the northern sky that recently finished operations after taking data for more than four years. One of the primary scientific drivers was to perform a deep time-domain survey of ten 7 sq. deg. fields. Our…

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Extrasolar Weather and Dust: on the Occurrence of Great Red Spots and Asteroid Belts

Cody Hall

Stanimir Metchev (The University of Western Ontario)

January 30, 2015
14:00 - 15:00

The detection of global weather phenomena in irradiated extrasolar hot Jupiters has provided tremendous insights into their atmospheric structure. Non-irradiated substellar atmospheres probe weather in an entirely different regime, where global atmospheric flows result primarily from a combination of rapid rotation and internal convection –…

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Variable Stars as Precision Distance Indicators: From the Local Group to the Hubble Constant

Cody Hall

Vicky Scowcroft (Carnegie Observatories)

January 23, 2015
14:00 - 15:00

Variable stars have been used as distance indicators for the past 100 years, but it is only in the last few years that we have truly reached the era of “precision” distance indicators. In this talk, I will discuss my work using mid infrared observations…

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The Dynamical Mass in Spiral Disks

Cody Hall

Matthew Bershady (University of Wisconsin-Madison)

January 16, 2015
14:00 - 15:00

A small fraction of the universe’s energy-density is comprised of normal matter. A still smaller fraction is bound into stars and gas that we can see and are responsible for life. This talk examines what we know about the baryon content in galaxies thought to…

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