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O-star formation triggered by cloud-cloud collision; From super star clusters to Spitzer bubbles

Mon, Jul 6, 2015 at 12:00 pm

131A Campbell Hall

Yasuo Fukui (Nagoya University)

We find the following sentence in Zinnecker and York “Toward Understanding Massive Star Formation” in Annual Review of Astronomy and Astrophysics 45, (2007), “Rapid external shock compression (i.e., supersonic gas motions) generating high column densities in less than a local free-fall time rather than slow quasi-static build-up of massive cores may be the receipt to set …

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Quasistatic Equlibrium Models of Galaxy Formation and the Consequences of Stochasticity: The Central Limit Theorem, Memory, and Precision Galaxy Evolution from First Principles

Tue, May 12, 2015 at 1:00 pm

131A Campbell Hall

Dan Kelson (Carnegie)

Incomplete knowledge of fundamental aspects of astrophysics severely limits the realism and accuracy of star-formation histories in simulations, resulting in poorly modeled correlations of galaxy properties with mass and environment, hampering our understanding of how galaxy populations have evolved for the past 13 Gyr. We have now derived new insights from the observed correlation of …

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Black Holes in Low Mass Galaxies

Mon, May 11, 2015 at 12:00 pm

131A Campbell Hall

Anil Seth (University of Utah)

Supermassive black holes are ubiquitous in massive galaxies, but it remains unclear how many sub-Milky Way mass galaxies host black holes.  The demographics of black holes in lower mass galaxies provide the only currently observable test of how supermassive black hole form in the early universe.  I will discuss my work to find and measure the mass of black holes in lower mass …

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Longitude-resolved VLA Radio Maps of Jupiter

Wed, May 6, 2015 at 3:00 pm

131A Campbell Hall

Imke de Pater (UC Berkeley)

Visible light and 5-micron infrared images of Jupiter reveal the familiar zone-belt structure, where the brown belts appear as warm regions at 5 μm. As clouds are a major source of opacity at this wavelength, the high 5 μm temperatures are indicative of no or relatively thin cloud decks so that deeper warmer layers are probed. In the mid-eighties microwave images at 1 – 6 …

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Resolving the intergalactic medium with tomographic reconstructions

Tue, May 5, 2015 at 1:10 pm

131A Campbell Hall

Casey Stark, UCB

Despite keen interest in how clusters form, the study of early cluster formation is observationally limited: clusters are rare and surveying large volumes is expensive. Today, there are only a handful of known z > 2 protoclusters. At the same time, cosmic voids have received renewed interest as tracers for an AP test and testing modified-gravity models, but current void samples are limited …

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