Colloquia Schedule Fall 2012
Colloquia are on Tuesdays (unless otherwise indicated) at 3:30 pm in RLM 15.216B
"Finding and Characterizing the Sources of the Ionizing Background with Keck and HST" University of California, Riverside host: Steve Finkelstein |
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1. "Investigating the Early Universe with Lyman-alpha Emission: Galactic Winds and Stellar Populations at z ~ 3.1" 1. Emily McLinden, 2. Stefano Meschiari, and 3. Michael Pavel University of Texas at Austin host: Sarah Tuttle |
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"Star Formation, Near and Far (y un anyo en Ame'rica del Sur)" University of Texas at Austin host: Steve Finkelstein |
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"Measuring Galaxy Evolution from Modern Near-IR Surveys" Texas A&M University host: Steve Finkelstein |
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"Carbon Stars and Dust Production in the Local Group" Cornell University host: Harriet Dinerstein |
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"Peering Through the EoR Window with the Murchison Widefield Array" University of Washington host: Neal Evans |
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"HETDEX Status" University of Texas at Austin host: Steve Finkelstein |
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"Stellar Feedback and the Ecology of the Galactic ISM" Large-scale surveys of the Milky Way complemented by high-resolution studies of small fields are revolutionizing our understanding of the Galactic interstellar medium (ISM) and star formation. There are no "initial conditions" for star formation. Every state of the ISM is dynamic and an evolutionary consequence of a prior state in the Galactic Ecology powered by galactic processes and super-bubbles created by massive star-clusters and OB associations. Most stars form in transient clusters produced by the gravitational collapse and fragmentation of dense clumps in giant molecular clouds (GMCs). I will describe the feedback ladder - a chain of increasingly powerful mechanisms regulating cloud properties, stellar mass, the star formation efficiency, and on its highest rung, responsible for the Galactic ecology. A cautionary tale for extra-galactic studies: In the ultra-dense clouds surrounding our Galactic center, the predictive power of the Schmidt-Kennicutt relations appears to fail. Yet, star formation may limit the growth of the central black hole and limit its influence on our Galaxy's ISM. I will discuss the feedback mechanisms by which star formation is self-regulated and the formation, evolution, and destruction of GMCs in the Solar vicinity, including protostellar outflows, FUV and EUV radiation, and the relationship of the nearby star-forming complexes to the local super-bubbles such as Orion, Sco-Cen, Per OB2, and the even older "fossil" bubble associated with the Gould's Belt / Cas-Tau fossil OB association. University of Colorado, Boulder host: Keely Finkelstein |
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"Obesity in the Universe: Why Did Early-Type Galaxies Grow in Size?" California Institute of Technology host: Paul Shapiro |
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"The Gaseos Environment of Distant Galaxies" University of California, Santa Cruz host: Chris Sneden |
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"Cassini-Huygens explores the Saturn System: Recent Discoveries and Science Highlights" Jet Propulsion Laboratory host: Bill Cochran |
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"Exploring Galactic Chemical and Dynamical Evolution: Pre and Post SDSS-III/APOGEE" Texas Christian University host: Chris Sneden |
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"Understanding Galaxy Clusters, the Most Massive Objects in the Universe" University of Texas, Dallas host: Karl Gebhardt |
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"Galaxy Formation: Physics and Numerics" University of California, San Diego host: Karl Gebhardt |
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"Ultrahigh Energy Cosmic Rays, Pulsars, and Supernovae" Institut d'Astrophysique de Paris host: Milos Milosavljevic |
Visitors to the Department of Astronomy can find detailed information and maps on our Visiting Austin Page.
Please report omissions/corrections to: G. Orris at argus@astro.as.utexas.edu.
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