title

Past Colloquia

Early Science Results from The Pan-STARRS Wide Field Imaging Survey (Karl W. Kamper Memorial Lecture)

Cody Hall

Nick Kaiser (U of Hawaii)

October 05, 2012
14:00 - 15:00

Pan-STARRS is a distributed aperture wide-field optical/NIR imaging system featuring 1.8m diameter telescopes with 1.4 billion pixel detectors.  The first telescope PS1 has been fully operational and relentlessly surveying the sky for almost 3 years and is delivering median image quality of 1.1″ FWHM.  By…

Read More »

Exploring 10 Gyr of galaxy evolution using CANDELS

Cody Hall

Eric Bell (U of Michigan)

September 28, 2012
14:00 - 15:00

Models of galaxy formation in a cosmological context correctly predict, at least qualitatively, the existence of disk-dominated and spheroid-dominated galaxies at the present day.  The same models, including prescriptions for gas cooling, star formation and stellar feedback incorrectly predict that all galaxies should be forming…

Read More »

Gas and Star Formation in Nearby Galaxies: New Results From the Herschel Space Observatory

Cody Hall

Christine Wilson (McMaster U)

September 21, 2012
14:00 - 15:00

The availability of new instruments and telescopes is making it possible to study large, well-selected samples of nearby galaxies at millimeter and submillimeter wavelengths. These observations trace the cold, dense gas and dust which is the fuel for star formation. I will discuss new results…

Read More »

Exploring the Dark Side of the Universe

Cody Hall

Chris Fassnacht (UC Davis)

September 14, 2012
14:00 - 15:00

In this talk I will show how the powerful combination of gravitational lensing and sensitive, high-resolution imaging can provide direct observational tests of galaxy formation scenarios under the cold dark matter paradigm as well as interesting constraints on cosmology.  In particular, I will discuss the…

Read More »

Beyond Bulge-Disk Decomposition: The True Nature of S0 Galaxies

Cody Hall

Michael Merrifield (University of Nottingham)

September 14, 2012
14:00 - 15:00

Perhaps the most basic defining feature of a galaxy is that its starlight is typically divided between disk and spheroidal components.  From the earliest studies, the way the light was split between these components formed a key element of the way in which galaxies were…

Read More »

Magnetized Atmospheres of Hot Exoplanets

Cody Hall

Kristen Menou (Columbia U)

September 04, 2012
15:00 - 16:00

Comparative planetology now encompasses a large set of extrasolar planets. Direct observational constraints on the atmospheres of several very hot exoplanets have become available. I will report on various efforts to interpret these observations in terms of atmospheric responses to unusual forcing conditions. In particular,…

Read More »

The first steps of planet formation across the stellar mass range

Cody Hall

Gijs Mulders (University of Amsterdam)

June 18, 2012
14:00 - 15:00

Protoplanetary disks are thought to be the main sites of planet formation, and to understand how planets form we need to understand the physical processes in these disks. One of these physical processes is turbulent mixing, which is the main driver of disk accretion. It…

Read More »

Characterizing super-Earths and mini-Neptunes

Cody Hall

Diana Valencia (MIT)

June 13, 2012
14:00 - 15:00

We have formally entered the era of super-Earths as masses and/or radii are being measured routinely for planets with a mass of less than ~10 earth-masses. The composition of these planets reflects their initial chemical inventory and early formation processes, such as giant impact collisions and…

Read More »

The influence of tectonics and magnetic field on the early evolution of Earth and Venus

Cody Hall

Peter E. Driscoll (Yale University)

June 08, 2012
14:00 - 15:00

Over much of Earth history the geomagnetic field has provided a unique protective boundary by balancing the erosive solar wind well above the top of the atmosphere.  On the contrary, the lack of evidence for a large scale magnetic field at Venus has been cited…

Read More »

How Distant Binary Stars Reshape Their Planetary Systems

MP 134

Nathan Kaib (Queen's University)

June 06, 2012
11:00 - 12:00

Although ~1/3 of all known planet-hosting binary stars are very wide (average stellar separations beyond 1000 AU), there are very few dynamical studies that consider planetary systems within such binaries.  Contrary to previous assumptions, we show that many of these distant binaries will have dramatic…

Read More »