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Past Colloquia

The Panchromatic Hubble Andromeda Treasury: 0.1 Billion Stars, and Lots and Lots of Dust

Cody Hall

Julianne Dalcanton (University of Washington)

September 25, 2015
14:00 - 15:00

Abstract: The Panchromatic Hubble Andromeda Treasury is an HST multicycle program to image the north east quadrant of M31 to deep limits in the UV, optical, and near-IR. The HST imaging has resolved the galaxy into over 150 million stars (comparable to ~1/2 the number…

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Probing the Secrets of Supernovae through their Spectra and Light Curves

Cody Hall

John Hillier (University of Pittsburgh)

September 18, 2015
14:00 - 15:00

The discovery of thousands of supernovae (SNe) by modern survey telescopes is allowing us to define the statistics of SN occurrence as a function of class and host galaxy properties, and is helping to facilitate the direct identification of SN progenitors. Further, we are able…

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Current status and future plans of the W. M. Keck Observatory

MP137

Hilton Lewis (Keck Observatory)

August 19, 2015
15:00 - 16:00

The W. M. Keck Observatory operates the largest, most scientifically productive telescopes on Earth. The two, 10-meter optical/infrared telescopes near the summit of Mauna Kea on the Island of Hawaii feature a suite of advanced instruments including imagers, multi-object spectrographs, high-resolution spectrographs, integral-field spectroscopy and…

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The Virgo Cluster of Galaxies

MP134

Laura Ferrarese (National Research Council)

July 17, 2015
14:00 - 15:00

At a distance of 16.5 Mpc and with a gravitating mass of 4.2×10^14 solar masses, the Virgo Cluster is the dominant mass concentration in the local universe, the centre of the Local Supercluster, and the largest concentration of galaxies within ~35 Mpc. With thousands of…

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Listening for the Echoes of Inflation from Antarctica

Cody Hall

Jeffrey Filippini (University of Illinois at Urbana-Champaign)

April 17, 2015
14:00 - 15:00

Our modern account of cosmic history begins with inflation, a moment of rapid expansion that established the large-scale geometry of our universe and sowed the quantum seeds of structure formation. Inflation should further have imprinted the universe with primordial gravitational waves on cosmological scales. The…

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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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